UST 



artb 



AST 



FIG. 8. A, skeleton of Frog from the dorsal aspect ; B, anterior face of the fourth 

 vertebra. (X i|.) In A the left half of the shoulder-girdle and. the left fore- 

 and hind-limbs are removed, as also are the investing bones of the left side of 

 the skull. Cartilaginous parts are distinguished by dotting. The names of 

 replacing bones are in thick capital letters, those of investing bones in italic 

 capitate, other references in small italics. 



a. c. hy. anterior horn of hyoid ; actb. acetabuluin ; AST. astragalus ; a. zyg. 

 anterior articular processes, or zygapophysis ; b. Ay. basi-hyal ; C. calcar ; 

 CAL. calcaneum ; en. centrum ; EX. OC ' exoccipitai : FE. femur ; /on, /on'. 

 fontaneUes ; FR. PA. fronto-parietal ; HU. humerus : II*. ilium ; Im. roof of 

 neural arch ; MX. maxilla ; n. sp. neural spine ; off. cp. olfactory capsule ; 

 at. pr. otic process ; p. c. ky. posterior horn of hyoid ; pd. base of neural arch ; 

 P.U.V. premaxilla : "PR. OT. pro-otic : QL'.JC. quadrato-jugal ; RA. TJL. 

 radio-ulna ; SP. ETH. sphenethmoid ; SQ. squamosal ; S. SCP. supra-scapula ; 

 sus. suspensorium : TI. FI. tibio-fibula ; tr . pr. transverse process ; DST. urc- 

 style ; V. I, cer\ical vertebra; V. 9, sacral vertebra; VO. vomer ; / V 

 digits. (From Parker and Haswell's Zoology, after Howes, slightly altered.) 



