436 
ACTlNOPTEETGir. 
Vomeropsis longi^pi^s (Agassiz). 
1796. Zeu8 vomer, G. S. Volta, Ittiolit. Veronese, pi. xxxv. fig. 3 
{errore). 
1796. Zeus triurus, G. S. Volta, ihid. p. clxxxi. pi. xliv. fig. 2^en\)i l). 
18S6-44. Vomer longispinus, L. Agassiz, Poiss. Foss. yol. v. pt. i. pp. 4, 
28, pis. V., yi. 
1854. Vomeropsis longispinus, J. J. Heckel, Sitzungsb. k. Akad. Wiss., 
matb.-naturw. Cl. yol. xi. p. 135. 
Type. Imperfect, partly distorted fish; Museum of Natural 
History, Paris. 
The type species, attaining a length of about 0’2. Length of 
head with opercular apparatus slightly less than maximum depth of 
trunk, which is contained twice in the total length to the base of 
the caudal fin. Pectoral fin with about 13 rays; dorsal fin with 
nearly 40 rays, of which the foremost 2 or 3 are rudimentary spines; 
anal fin slightly more extended than the dorsal, arising just in 
adyance .of the latter, with about 30 rays, of which the foremost 
1 or 2 are rudimentary spines; caudal fin slightly rounded. 
Form. ^ Log. Upper Eocene : Monte Bolca, near Verona. 
36200. Imperfect large specimen with traces of scales. 
Purchased, 1861. 
P. 1990. Fine small specimen, in counterpart, labelled by Agassiz. 
The head is well shown, with its great supraoccipital 
crest, small upturned mouth, and traces of minute teeth. 
There are about 8 branchiostegal rays. The yertebrse are 
eyidently 10 +14 in number; the centra are much con¬ 
stricted, and some show a single sharp lateral keel; the 
hinder four or fiye neural spines in the abdominal region 
curye forwards at their upper end. The clayicle is slender 
and sigmoidally bent, with a long rod-like postclayicle 
extending to the yentral border of the fish. The coracoid 
extends downwards to the clayicular symphysis by a 
falciform process from its postero-inferior angle. The 
pelyic fin-support is somewhat expanded, forked an¬ 
teriorly, and is in contact with the clayicle at the two 
extremities of this bifurcation. The anterior spine of 
the pelvic fin is very small; the length of the two (or 
possibly three) next rays equals at least half the depth of 
the trunk at their insertion; while both these and the 
succeeding diminutive rays are finely divided distally. The 
rays of the dorsal and anal fins are not very satisfactorily 
displayed, but all except two or three anterior rudimentary 
