. Cold-blooded vertebrates: part I. Fishes. Fishes; Amphibians; Reptiles. Fig 87. Snake skulls showing the three types of poison fangs, and one skull with nonpoisonous dentition. A, rattlesnake, fangs solidly fixed in movable maxillary; B, cobra, fangs solidly fixed in immovable maxillary; C, tree snake Jioiga, grooved fangs in back part of upper jaw, not dangerous to man; D, solid- toothed snake, no fangs and nonvenomous The poison comes from a gland back of the eye and passes through a canal to the base of each fang. Though the fangs are immovable, the maxillary turns, permitting them to be
. Cold-blooded vertebrates: part I. Fishes. Fishes; Amphibians; Reptiles. Fig 87. Snake skulls showing the three types of poison fangs, and one skull with nonpoisonous dentition. A, rattlesnake, fangs solidly fixed in movable maxillary; B, cobra, fangs solidly fixed in immovable maxillary; C, tree snake Jioiga, grooved fangs in back part of upper jaw, not dangerous to man; D, solid- toothed snake, no fangs and nonvenomous The poison comes from a gland back of the eye and passes through a canal to the base of each fang. Though the fangs are immovable, the maxillary turns, permitting them to be folded back when the jaw closes. In the group of poisonous snakes which includes the cobras and their allies (family Elapidae) as well as some of the sea snakes, we find a pair of short fangs in the forward part [341]. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Hildebrand, Samuel F. (Samuel Frederick), 1883-1949; Gilmore, Charles Whitney, 1874-; Cochran, Doris M. (Doris Mable), 1898-1968. [New York, Smithsonian institution series, inc. ]
Size: 2216px × 1127px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, booksubj, booksubjectfishes, booksubjectreptiles
