235 
B. A.—Bulbus arteriosus. 
B. Br. 1-4.—Basi-branchials 1 to 4. 
Bd.—Bile duct. 
B. O.—Basi-occipital. 
Br. 1.—First holobranch. 1, the first visceral arch. 
Br. R.—Branchiostegal rays, numbered from before backwards. 
Bs.—Baseosts, numbered from before backwards. 
C.—Centrum. 
C. Bri 
Cy Br4 
C. F.—Facet on atlas for paroccipital condyle. 
C. Fn.—Caudal fin. 
C. Hy.—Cerato-hyal. 
cil. b, Ramus ciliaris breyis. 
| —Corato-bwnchia of the first and fourth branchial arches. 
cul. g.—Ciliary ganglion. 
cil. 1.—Ramus ciliaris longus, 
Cir. c.—Circulus cephalicus. 
Cl.—Clavicle. 
Co.—Coracoid. 
com. 1—vii..—RR. communicantes between the sympathetic and the first 
seven spinal nerves. 
com. v.i1—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 
d. ¢ 
d. end.—Vestigial ductus endolymphaticus, with two minute utriculo- 
saccular canals opening into its base. 
D. F.—Dorsal fin. 
‘}—Dorsal roots of the first spinal nerve. 
E. Br. 
i | —Epibranchials of the first and fourth branchial arches. 
H. Br.4 ) 
Ef. Br. 1—4,—First to fourth efferent branchial arteries. 
Ep. 1 
= 48 Fin and second epural bones. 
Ep. Hy.—pi-hyals. 
Ep. O.—Epiotic. 
