. On the anatomy of vertebrates. Vertebrates; Anatomy, Comparative; 1866. DEVELOPEMENT OE KEPTILIA. 637. tfllirlc i)f a Viper at a more advanced period, showing the yulk partially taken into tlie abdominal cavily. XLiii. 448 Tn figure 447, the vitel- liclc of a Viper, at a more advanced period, shows part of the food-yolli entering the abdominal cavity, at u: the ductus vitello-intesti- nalis, d, is reduced to a thread: g is the intestine, and /{ the kidney. Figure 448 shows the body of a Viper just before the period of extrication Irora the egg - coverings ; the parictcs of the abdomen are pa
. On the anatomy of vertebrates. Vertebrates; Anatomy, Comparative; 1866. DEVELOPEMENT OE KEPTILIA. 637. tfllirlc i)f a Viper at a more advanced period, showing the yulk partially taken into tlie abdominal cavily. XLiii. 448 Tn figure 447, the vitel- liclc of a Viper, at a more advanced period, shows part of the food-yolli entering the abdominal cavity, at u: the ductus vitello-intesti- nalis, d, is reduced to a thread: g is the intestine, and /{ the kidney. Figure 448 shows the body of a Viper just before the period of extrication Irora the egg - coverings ; the parictcs of the abdomen are partly removed to show the vitellicle, b, which has now become inclosed in that cavity, with almost complete obliteration of the umbilical cicatrix: a, the remains of amnios and al- lantois: d, the much short- ened ductus vitello-intesti- nalis: g, the liver: ff, the stomach : f, the duodenum: n, the small intestine : the other letters indicate the same parts as in the pre- ceding fio'ures. The gravid Viper is more than usually sluggish, and loves to bask in the hot sunshine, turning her belly as if to court the aid of the extraneous warmth in ac- celerating the internal in- cubation of her eggs. Figure 449 shows the Q(i-(y and embryo of the jMonitor Lizard near the iieriod of extrication: a is Bodyoi;a\ .\liii. tlie remnant of the food-yolk: b the amnion laid open to show the embryo, d; its long tru'nk aud tail arc packed in spiral folds as. 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 Owen, Richard, 1804-1892; Cornell University. College of Veterinary Medicine. Flower-Sprecher Veterinary Library. fmo. London, Longmans, Green
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Keywords: ., bookauthorowenrichard18041892, bookcentury1800, bookdecade1860
