394 
ACIINOPTEPvYGlI. 
Naples University Museum, described as the type specimen of 
Imogaster auratus by 0. G. Costa (Mem. E,. Accad. Sci. Napoli, 
vol. ii. 1857, p. 103, pi. i. lig. 2), is referable to Pycnosterinx 
discoides. According to P. Bassani (communicated MS.), the 
specimen exhibits about 26 vertebrae, of which 16 are caudal. 
The dorsal fin comprises 5 spines and about 23 divided rays, the 
anal fin 2 or 3 spines and about 18 rays. The scales are too 
imperfectly j)reserved to decide whether or not they are ctenoid. 
Form. Log. Upper Cretaceous : Sahel Alma, Mt. Lebanon. 
P. 4760. Pine specimen about 0’095 in length, apparently very 
little distorted, and exhibiting the true proportions of this 
species. Lewis Coll. 
49578. Another fine specimen, slightly distorted, so that the mouth 
is opened and the pelvic and anal fins are displaced 
backwards ; figured by Davis, loc. cit. pi. xxviii. fig. 2, as 
P, dorsalis. ' Lewis Coll. 
47811-12, 48114, 48118, 49573, P. 4861. Six specimens, more or 
less imperfect, shortened and deepened by distortion. 
Lewis Coll. 
P. 1955 a, P. 4156. Two small specimens shortened and deepened 
by distortion. Egerton Ennislcillen Colls. 
Pycnosterinx gracilis, Davis. 
1887. Pycnosterinx gracilis, J. 'VY. Davis, Trans. Eoy. Dublin Soc. [2] 
vol. hi. p. 539, pi. xxix. fig. 1. 
Type. Imperfect fish ; British Museum. 
A rather elongated species, attaining a length of about 0'15. 
Length of head v ith opercular apparatus about equal to the 
maximum depth of the trunk, which is contained two and a half 
times in the total length of the fish to the base of the caudal fin ; 
caudal pedicle as in the type species. Dorsal fin with 5 slightly 
ribbed spines and about 24 divided rays ; anal fin not much less 
extended, with 4 slightly ribbed spines and 18 or 19 divided rays, 
arising opposite the foremost divided rays of the dorsal fin. 
Form. Loc. Upper Cretaceous : Sahel Alma, Mt. Lebanon. 
48131. Type specimen described and figured by Davis, loc. cit. 
Minute teeth are observable on the extended premaxilla 
and on the dentary. The preoperculum is very narrow, as 
usual, and not larger than the operculum. The trunk is 
obliquely distorted, so that the dorsal fin is crushed 
