SEA-FISHERIES LABORATORY. 379 



B. A. — Bulbus arteriosus. 



B. Br. 1-4. — Basi-branchials 1 to 4. 



Bd.— Bile duct. 



B. 0. — Basi-occipital. 



Br. 1. — First holobranch. 1, the first visceral arch. 



Br. B. — Branchiostegal rays, numbered from before backwards. 



Bs. — Baseosts, numbered from before backwards. 



C. — Centrum. 



C. Br* 



, — Cerato-branchials of the first and fourth branchial arches 

 C. Br.* 



C. F. — Facet on atlas for paroccipital condyle. 



C. Fn. — Caudal fin. 



C. Hy. — Cerato-hyal. 



cil. b. — Ramus ciliaris brevis. 



cil. g. — Ciliary ganglion. 



cil. I. — Ramus ciliaris longus. 



Cir. c. — Circulus cephalicus. 



CI.— Clavicle. 



Co. — Coracoid. 



com. 1—vii.. — RR. communicantes between the sympathetic and the first 

 seven spinal nerves. 



com. v. 1 — R. communicans between the sympathetic and the N. 

 trigeminus. 



Cr. C. — Cranial cavity. 



d. 2—6. — Dorsal roots of the spinal nerves 2 to 6. 

 D. — Dentary. 

 d. b. 



-Dorsal roots of the first spinal nerve 

 d. c ' 



d. end. — Vestigial ductus endolymphaticus, with two minute utriculo- 

 saccular canals opening into its base. 



D. F.— Dorsal fin. 



E. Br.i 



_ ._- . [ — Epibranchials of the first and fourth branchial arches. 



Mi. Br.* 



Ef. Br. 1 — 4. — First to fourth efferent branchial arteries. 



Ep. 1 



-First and second epural bones. 

 Ep. 2 ' 



Ep. Hy.— Epi-hyals. 

 Ep. O. — Epiotic. 



