;^40 



ZOOLOGY 



SECT. 



the row oi neural plates. The neural jjlates are absent in some 

 cases (Cheloch'na). 



y?p 



Fifi. fiS5.— Anterior vortebn* of yomig Crocodile. A. atlas; Ep. axis; IS. iiitervortcbval 

 disos ; 0. pro-atlas; 0?/. neural arclies-; J'o. odontoid bone; Ps. ■ spinous ijrocesses ; PI. 

 transverse pi-ocesses ; Ji. RA J{.~ libs ; s. arch of -atlas ; v. median piece of atlas : If'A'. centra. 

 (From ^Yiedersheinl's Comimrtii/rc Aiuilomv.) 



Fir;. 0S6.— Cistudo lutaria. Skeleton seen from below ; the plastron lias been removed and 

 is represented on one side. C. costal plate ; Co. coraeoid ; e. entoplastron (epistennnn): 

 ^}i. epijilastron (clavicle?); F. fibula; Fe. femur; H. Inimerus ; 7////>. liyoi>lastron ; Hp-p; 

 liypoplastron ; Jl. ilium ; y.<. ischium ; M. marginal plates ; Nu. nuchal jplate ; Vh. pubis ; 

 Pro. procoracoid or process of scainila ; /';/. pygal plates ; R. radius ; -SV.-. scapula ; T. tibia ; 

 U. ulna ; Xp. xiphiplastron. (From Ziftel.) 



The bony elements of the plastron of the Chelonia are an 

 anterior and median plate, or ento^yhtstron, and four pairs of plates 



