TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



Tb. 1—5. — The five tuberosities seen externally on the ocular side passing 

 backwards from between the two eyes. 



Thm. — Thymus gland. 



t. liin. — Truncus hyomandibularis facialis. 



t. inf. — Truncus infraorbitals (trigemini et facialis). 



Tr. P. — Transverse process. 



U. -\- Hp. S. — Urostyle and third hypural fused together. 



U. H//. — Basi-hyal. 



up. in. hue. — Upper division of the R. buccalis interims facialis. 



Ur. — Urostyle. 



Uret. — Ureter. 



Ur. pp. — Urinary papilla. 



- — Central and vertical chambers of the utriculus. 



iitr.' 



2 — 6. — Ventral roots of spinal nerves 2 to G. 

 V. — Vertebral centra numbered from before backwards. F 1 is the atlas. 

 v. b.' \ 



v. b. I — Ventral roots of the first spinal nerve. 

 v. c. J 



V. card. — Cardinal vein. 

 Yen. — Ventricle. 

 V. gen. — Genital vein. 

 V. hep. — Hepatic vein. 



* . ' L — Superior and inferior iu^ular veins. 

 V.jug.' ] 



To. — Vomer. 



Yp. — Portal veins. 



V. pc. — Right precaval vein. 



Plate I. 



Fig". 1. Dorsal surface of an undried skull of a 65cm. 

 Plaice. Natural size. The dotted line indi- 

 cates the departure from the symmetry. The 

 anterior extremity is somewhat schematic, 

 and is drawn as if seen a little from behind. 

 The fenestra in the ethmoid cartilage is only 

 partially visible in a strictly dorsal view. 



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