BERYCIDJ!. 
393 
origin, 3 longitudinally ribbed spines and 14 divided rays, arising 
opposite the middle of the dorsal fin. 
A careful study of the specimens enumerated below suggests that 
*he supposed differences between the various named forms here 
included in P. russegqeri are due to imperfections in tho preservation 
°f the specimens. The shape of the fish and the arrangement of its 
dorsal and anal fins conduce to very variable distortion ; while the 
longitudinal ribbing of the fin-spines frequently affords a false 
impression of their number. 
Form, Loc. Upper Cretaceous : Sahel Alma, Mt. Lebanon. 
47820, 49579. Two fine large specimens exhibiting the principal 
characters of the genus and species. Lewis Coll. 
9143. Large specimen. 
Presented by A. S. Woodward, Esq., 1900. 
figurod bv Davis, loc. cit. pi. xxvm. 
Lewis Coll. 
49577. Imperfect specimen 
fig. 2 a. 
46399, 46541, 47375, 47818, 49576. Five imperfect and distorted 
small specimens, the second in counterpart. Lewis Coll. 
1953 b. Small well-preserved fish, partly in impression. 
Eyerton Coll . 
Pycnosterinx discoides, HeckeL 
1849. Pycnosterinx discoides , J. J. Heckel, in Russeggers Rei.en, 
vol. ii. pt. iii. p. .340, pi. xxiii. fig. 3. T 
I80O. Pycnosterinx disco ides, F. J. Pictet, Poiss. Foss. • 1 an > 
p. 14. .p . 
1866. Pycnosterinx discoides, Pictet & Humbert, Nouv. Rech. Po 
Foss. Mt. Liban, p. 38, pi. iii. figs. 1, 2. G 
1887. Pycnosterinx discoides, J. W. Davis, Trans. Roy. Dublin Soc. 
[2] vol. iii. p. 632, pi. xxvii. fig. 3. ...... , 
1887. Pycnosterinx dorsalis, J. W. Davis, ibid. pi. xxvm. fig. - (err ore). 
Type. Imperfect fish. T , f 
A deep-bodied species, about as large as the tjpe. en B 
head with opercular apparatus considerably less than the maximum 
depth of the trunk, which much exceeds one half the total leng. 
of the fish to the base of the caudal fin ; width of caudal pedicle 
equalling one quarter of the maximum depth. Fins as in the type 
species, except that the dorsal and anal each comprise one or two 
additional divided rays, while the anal may arise slightly further 
forwards. 
It seems probable that the imperfect fish from Sahel Alma in the 
