Identifier: b20416039_001 Title: On the anatomy of vertebrates [electronic resource] Year: 1866 (1860s) Authors: Owen, Richard, 1804-1892 Subjects: Anatomy, Comparative Vertebrates Fishes Reptiles Mammals Birds Publisher: London : Longmans, Green Contributing Library: Wellcome Library Digitizing Sponsor: Wellcome Library

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Text Appearing Before Image: inthe Iguana. In the Crocodile the pan-creas is divided into two elongated lobes,and sometimes sends its secretion into theduodenum by two ducts. In Chelydraserpentina the pancreas extends from thepylorus some inches along the duodenum,dividing and again uniting, forming a loop,and giving off a process which extends tothe spleen. In the Turtle ( Chelone Midas)the pancreatic duct terminates on a pa-pilla, which projects into the terminal ex-pansion, or (ampulla, of the bile-duct.The pancreas in carnivorous Terrapins {Emys) is more bulkyand compact in form than in the fucivorous Turtles ( Chelone). Thus in the vegetable-feeding Gopher the pancreas is -^qq ofthe total weight of the animal: whilst in the carnivorous Snapperit is q-Iq of the total weight of the animal. As the proportionof fat consumed by Carnivora must be greater than that byHerbivora, the results of the above comparative observationsaccord with the view of the use of the pancreas in preparingfatty matters for absorption.2

Text Appearing After Image: Liver, pancreas, and spleen ofthe Frog (Rana). ccxxxi. 1 xx. vol. i. p. 235, no. 778. 2 Dr. Jones, ccxlv. p. 107, ascertained the weight of the body and of the pancreasin several American Reptilia, and gives the relative weight of the latter in the sub-joined form. Number of times the weight of its pancreas. Rana Catesbiana (Bull-frog) 1088 Heterodon niger (Black viper) ....... 537 Psammophisflagelliformis (Coachwhip snake) .... 1353 Coluber guttatus (Corn snake) ....... 1371 Coluber constrictor (Black snake) M 472 Crotalus durissus (Banded rattlesnake) , 965 Chelone caretta (Loggerhead turtle) . , . . . 518 Chelydra serpentina (Snapping turtle) ..... 630 Emys terrapin (Salt-water terrapin) ....... 994 Emys reticulata (Chicken terrapin) . . . . 763 Emys serrata (Yellow-bellied terrapin) 1067 Testudo Polyphemus (male Gopher) 3500 455 CHAPTER VI. ABSORBENT SYSTEM OF HiEMATOCRYA. § 78. All the definite structures of soft parts — acini andsimpler gland-follicles, their prolonged outlet

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