"Ventral" Quotes from Famous Books
 ... skin-colour by sexual selection, since it would have produced races sharply defined by their colour and not united to other races by transition stages, and this, it is well known, is not the case. Moreover, the fact established by me,[109] that in all races the ventral side of the trunk is paler than the dorsal side, and the inner surface of the extremities paler than the outer side, cannot be explained by sexual selection ...
— Evolution in Modern Thought • Ernst Haeckel
... have undoubtedly skeletal properties, and as it also has topographical relations with the mouth, it has been designated in English by the non-committal term stomochord. It is not a simple diverticulum of the collar-gut, but a complex structure possessing paired lateral pouches and a ventral convexity (ventral caecum) which rests in a concavity at the front end of the body of the nuchal skeleton (fig. 3). In some species (Spengelidae) there is a long capillary vermiform extension of the stomochord in front. The nuchal skeleton is a non-cellular laminated ...
— Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 2 - "Baconthorpe" to "Bankruptcy" • Various
... Templeton; Fig. 159, side view, see also Fig. 161, where the mouth-parts are greatly enlarged, the lettering being the same, md, mandibles; mx, maxillae; mp, maxillary palpus; lb, labium; lp, labial palpus; lc, lacinia; g, portion ending in three teeth; l, lobe of labium; sp, ventral sucking disk; the dotted line's passing through the body represent the course of the intestine; b, end of tibia, showing the tarsus, with the claw, and two accessory spines; a, third joint of the spring. ...
— Our Common Insects - A Popular Account of the Insects of Our Fields, Forests, - Gardens and Houses • Alpheus Spring Packard
... asymmetrical bodies. They rest on one side—in the greater number of species on the left, but in some on the right side; and occasionally reversed adult specimens occur. The lower, or resting-surface, resembles at first sight the ventral surface of an ordinary fish; it is of a white colour, less developed in many ways than the upper side, with the lateral fins often of smaller size. But the eyes offer the most remarkable peculiarity; for they are both placed on the upper side of the head. During early youth, however, ...
— On the Origin of Species - 6th Edition • Charles Darwin
... Pains ventral, subventral, In stomach or entrail, Think no longer mere prefaces For grins, groans, and wry faces; But off to the doctor, fast as ye can crawl! 5 Yet far better 'twould be not to have them ...
— The Complete Poetical Works of Samuel Taylor Coleridge - Vol I and II • Samuel Taylor Coleridge
... and in like manner the spinal cord in the human vertebrae at no period agrees with the corresponding part of the lower kind of animals. The moment it becomes visible in the human embryo, it is entirely dorsal in position; while in mollusks and articulatas a great part, or nearly the whole, is ventral. The same is true of the heart, or centre of the vascular system, which has always a different relative position in the great nervous centre in the human embryo from what it has in any articulate animal, and ...
— An Expository Outline of the "Vestiges of the Natural History of Creation" • Anonymous
... away into the grass and effaces itself. Any one who has the nerve to look it between the eyes may uncover its pretense. For by this token may be known the real Crotalids from the mock: a small but distinct pit between eye and nostril. Lacking this mark, no ventral crawler in the land of the free need cause a flutter in the most timid breast, with ...
— Stories from Everybody's Magazine • 1910 issues of Everybody's Magazine
... passage of the organism into them. (2) Again, it may advance by a sort of rolling: the lower surface, or that in contact with the substratum over or under which it is passing, is viscid and adheres to the substratum, the superficial dorsal layer passing forward and bending over to the ventral side; whilst the converse action takes place at the hinder end; (3) or again, the pseudopodia, when long, well marked and relatively permanent, may serve as actual limbs on which the body is supported and on which it moves. In the outgrowth of a pseudopod the process may take place gradually, ...
— Project Gutenberg Encyclopedia
... broad as long. The back fin rises behind the centre of the back; it is comparatively small, falcate, curved over the top to a blunt point, and concave behind. The line of the back is sharp from this fin down to the tail. The ventral line is the same for some inches behind the anus. The colour is dark slaty-blue above, almost black, a little paler below, without any streaks or marks, such as in O. fluminalis ...
— Natural History of the Mammalia of India and Ceylon • Robert A. Sterndale
... filled with water. They generally, but by no means always, contain bubbles of air. According to the quantity of the contained water and air, they vary much in thickness, but are always somewhat compressed. At an early stage of growth, the flat or ventral surface faces the axis or stem; but the footstalks must have some power of movement; for in plants kept in my greenhouse the ventral surface was generally turned either straight or obliquely downwards. ...
— Insectivorous Plants • Charles Darwin |
