378 transactions liverpool biological society. 



Explanation of Plates. 

 Reference Letters. 



A. 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 epibranchial 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. hy. — Hyoidean artery. 



Al. S. — Alisphenoid. 



amp. a.\ 



n [ — Anterior, external, and posterior ampullae of the semicircular 

 amp. e. v cana i s . 



amp. p. ) 



An. — Angular. 



a. nos. ) 



— Right and left anterior nostrils.. 

 a. nos' . 1 



ant. cr. — Crista acustica ampullae anterioris. 



Ao. d. — Dorsal aorta. 



A. ce. — Oesophageal artery. 



A. op. — Ophthalmic artery. 



Ao. V. — Ventral aorta. 



A. pe. — Pelvic artery. 



Ar. — Articular. 



A.R. — 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. a — Transverse ligament connecting axonost with skin. 



Ax. b — Triangular plug of cartilage occurring in the head of every 

 axonost. 



A. Zy. — Anterior zygapophysis. 



