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PHYLUM CHORDATA 



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Fic!. 922.— Rana temporaiia. A, the skeleton from the dorsal aspect ; the left half of the 

 shoulder- girdle and the left fure- and hind-limbs are removed, as also are the investing bones 

 on the left side of the skull. Cartilaginous parts dotted. Names of replacing bones in thick?, 

 those of investing bones in italic .capitals, other references in small italics, a, c. hy. 

 anterior cornu of hj-uid ; actb. acetabulum; AST. astragalus; h. h/i. basi-hyal ; C. calcar ; 

 CAIa. calcaneuni ; EX. OC. exoccipital ; FE. femur ; /oh. /on', fontanelle.s ; FR. I' A. 

 fronto-parietal ; HIT. humerus ; IIi. ilium ; MX. maxilla ; olf. cp. olfactory capsule ; ot. pr. 

 otic process ; p. c. Ivj. posteric^r cornu of hj-oici ; PMX. jiremaxilla ; FR.OT. pro-otic ; 

 Qu. Ju. quadrato-jugal ; RA.UIi. radio-ulna ; SF.ETH. sphenethmoid ; HQ. para- 

 quadrate ; S.SCF. supra-scapula ; sus. suspensorium ; TI.FI. tibio-fibula ; <)■.?»•. trans- 

 verse process ; XJST. urostyle ; V. 1, cervical vertebra ; V. 9, .sacral vertebra ; VO. vomer ; 

 / — V, digfits. B, the fourth vertebra, anterior face. a. zyy. anterior zygapophysis ; en. 

 centrum ; ?»i. lamina ; n. sp. neural spine ; pii, pedicle ; </•. pv, transverse process. (After 

 Howes, slightly altered.) 



