H E R P E T O L O G Y. 



41 



Explua- 



FLATC 

 CCXCY. 



Fig. 3. The jaws of the Nilotic crocodile extended, 

 shewing the mode of their articulation. 



Fig. 4. Stomach of the common land tortoise, 



Fig. 5. Stomach of the Ga vial crocodile, with a portion 

 of the intestinal canal commencing at a, the pylorus. 



Fig. 6. Stomach of the Nilotic crocodile partly laid 

 open ; a, a pouch into which the aliment* pass before 

 proceeding out at b, the pylorus. 



Fig. 7. Stomach and intestines of the Chameleon ; 

 a, the pytonu ; from a to b, the small intestine ; b, the 

 oommencempnt of the large intestine. 



Fig. 8. Part of the intestines of the land tortoise ; 

 a 6, a part of the small intestine; b, the commencement 

 of the large intestine. 



Fig. 9- The rectum of the Nilotic crocodile insensibly 

 commencing from the small intestine ; a , a valve be- 

 tween the two. 



Fig. 10. lUclum of the Gavial ; a, the termination of 

 the small intestine; b, the rectum; c, a projection from 

 the small intestine into the large for acting es a valve. 



Fig. II. Stomach and intestines of the Siren ; a the 

 pylorm ; b, the termination of the hepatic duct. 



Fig. 12. The heart of the crocodile seen on it* lower 

 surface; aa, the right auricle ; c, the common trunk of 

 the right carotid and right brachial arteries; d. the com- 

 mon trunk of the seme arteries on the left eide;?e, the 

 continuation of the right posterior aorta ; ff. the left 

 posterior aorta : g A, the left and right pulmonary ar- 

 teries ; i *, the pulmonary veins ; o, the opening by 

 which the right auride communicates with the inferior 

 compartment of the ventricle; />, an orifice I 



cavity of the ventricle ; <j, r, two valve* at the i 

 mencement of the left aorta ; *, I, the trunks of the two 

 arteries c and a* laid open ; v, the trachea ; **, it* sub- 

 divisions into brenchi ; v y, situation of the lungs. 



Fig. 13. The heart of the crocodile viewed on its in- 

 ferior surface, bat a little more to the left side. 



\ Irre the letters a. e. d, r, f, g, A, refer to the seas* 

 parts as in the preceding figure. 6, the left or niihsfl 

 nary auricle ; m, a row of tubercles behind ; i. y, the 

 valves guarding the entrance of the left pulmonary ar- 

 tery ; r, the commi-nicstion trtween the inferior and 

 pmtmminj compartments of the ventricle. 



Fig. 14. The crocodile* bent seen on its upper sur- 

 face ; where the letter* , *, e, d, e.f. g. A, Ck, refer 

 to the same pen* a* in the former ngnrea. /, the up- 

 per eosBpetUMnt of the ventricle laid 



Fig. 1 5. The general appearance of the ova of frog, 

 as extruded from the oviduct. 



Fig. 16. The tadpole of the frog, when only a few 

 days old. 



Fig. 1 7. The tadpole of the Surinam frog in that 

 stage called frog-fuh. 



fig. 1 8. is the under surface of one of the toes of the 

 Gecko Efyptiaau, of the natural size. See p. 29- 



Fig 19. Is a toe dissected to shew the appearance of 

 the pockets on its under surface, their serrated cuticular 

 edge, the depth of the pockets, and the small muscles 

 by which they are drawn open, the parts being highly 

 magnified : a a are the two muscles which lie on the 

 sides of the bones of the toe, with thi-ir tendons inserted 

 into the last bone, close to the root of the claw. The mus- 

 cles belonging to the pocket go off from these tendons. 



PLATE CCXCVI. 



Fig. 1. Ckehnia mydat. Green turtle. 



Fig. 2. TfttuJo Grata. Common land tortoise. 



Fig. 3. Crocodiles \iloticut. Crocodile of the Nile. 



Fig. 4. Dracmna. Dragon lizard. 



Fig. 5. Tni>nu>m6itornatus. Ornamented tupinambK. 



Fig 6. Batiluetu mitraltu. Mitred basilisk. 



Fig. 7. Iguana dtlicatittima, Common guana. 



Fig. 8. Draco volant. Flying dragon. 



Pr.ATE 



CCXCVI. 



PLATE CCXCVI I. 



Fig. 9. Arama et 

 Fig. 10. A 



Galeot Agama. 

 tete. Short-tailed stellio. 

 K.ic II Ckamtito sutpsru. Common chameleon. 



ccxcm. 



anolis. 

 lizard. 

 Six-striped Uky- 



Fig. 12. Geceo Eryp&cmt. 

 Fig. 13. Aneiu timamlattu 

 Fig. 14. I^certa Itmnitemtm. 

 Fig. 15. Takydromnu 



llrr.niiv 



Fig. 16. Seine** tffdnmUt. 



PLATE CCXCVIII. 



Fig. 1 7. Stp* penladfici if/Hi. Five-toed eft. 

 Fig. 18. Ckalctdu tridacl<tl*t. Three-toed chalcide*. 

 Two-coloured tree-frog. 



PLATE 

 CCIcriii. 



Fig. I!'. Hylm bicolor. 

 Fig . 80. Rtua fwrdoj-a. 

 SI. Bwfolortifer. 



Surinam fr 



Fig. SI. ArfbeWper. Surinam taedT 

 Fig. tt. SeZnMeVe temttrit. Common salamander. 

 Fig. 23. Prolrtu augMouu. Common proteu*. 

 > *4b Sinn lecerlne. Leceitine siren. 



INDEX. 



AUTHORS NAMES. 



Pltay. t 

 K-T- "> 



I 



.< 



r.s 



.40 

 . t 



Indtx. 



^ <>.'<: r 



IM)EX OF GENERA, AND REMARKABLE CIRCUMSTANCES. 



Afsasa fhsclau. ib. 



aspen. Ik. 

 vou >t. f*T I. 



i atrm.ltk< 

 awfta. M 

 atom, n 



Afrnm* beUostapa. f 

 namonu, tt 



n 



