I —Anterior, external, and posterior ampullae of the semicircnlar 



234 



Explanation of Plates. 

 Reference Letters. 



^_ car. — Internal carotid arteries (the two outer ones). 



A. car' .—External carotid artery. 



A. Cm. — Coeliaco — mesenteric artery. 



A. coe. — Coeliac artery. 



A. ep. — Right epihranchial artery. 



A.F. — Anal fin. 



Af. Br. 1 — 4. — First to fourth afferent branchial arteries 



A. gen. — Common genital artery. 



A. gen' — Right genital artery. 



A. hep. — Hepatic artery. 



A. hxj. — Hyoidean artery. 



Al. S. — Alisphenoid. 



nmp. a 



«"*^- '■ I canals 



amp. p. ] 



An. — Angular. 



a. nos. ] , , . 



— Right and left anterior nostrils. 

 a. iios' . j 



ant. cr. — Crista acustica ampullae anterioris. 



Ao. d. — Dorsal aorta. 



A. (e. ^Oesophageal artery. 



A. op. — Ophthalmic artery. 



Ao. V. — Ventral aorta. 



A. pe. — Pelvic artery. 



Ar. — Articular. 



A.B. — Accessory ribs or intermuscular bones, numbered from before back- 

 wards. 



A.R.* — Tubercle on fourteenth and many of the succeeding vertebrae' 

 representing probably a fused accessory rib. 



a. s. c. — Anterior semicircular canal. 



A. scl. — Right and left subclavian arteries. 



A. sp. — Splenic artery. 



Aur. — Auricle. 



Ax. — Axonosts or interspinous bones, numbered from before backwards. 



Ax." — Transverse ligament connecting axonost with skin. 



Ax.>' — ^Triangular plug of cartilage occurring in the head of every 



axonost. 

 A. Zij. — Anterior zygapophysis. 



