SaTJATlNH)^. 
r.9 
Squatina crassidens, sp. nov. 
Type. A nearly complete fish, figured (one half nat. size) in 
Plate II. fig. 1. 
Head and branchial region short ; the pectoral propterygium ex- 
tending almost or quite as far forwards as the first branchial arch. 
The pectoral fins much elongated, with very long metapterygium. 
Pelvic fins also elongate, with at least twenty basal cartilaginous 
rays. Skin covered with numerous very minute prickles, but appa- 
rently without larger spinous tubercles ; series of strong rounded 
dermal tubercles upon the anterior border of the head and each of 
the paired fins, and upon the lateral aspect of the tail. Teeth with 
very low crowns. 
Form. ^ hoc. Upper Cretaceous (Turonian) ; Sahel Alma, Mount 
Lebanon, Syria. 
P. 4017. Type specimen, figured in Plate II. figs. 1, 4. Except 
the median fins, almost the whole of the fish is preserved, 
though in most parts much defaced by crushing and ex- 
trication from the matrix. The total length of the fossil 
is 0'42 metre, and the maximum breadth between the 
outer margins of the pectoral fins would probably be 
about 0’25 metre. The vertebras are of the usual type, 
and strong ribs occur posterior to the pelvic girdle. In 
the right pectoral fin the propterygium (pr.p) and meso- 
pterygium (ms.p) are seen ; and there are indications of a 
preaxial thickened ray in the pelvic fins. The teeth are 
well shown in a portion of the mouth, and are remarkable 
for the extreme lowness of the crown. An anterior view 
of one of these teeth, enlaiged seven times, and an upper 
view, on the same scale, are given in fig. 4; there are 
radiating striations upon the posterior portion of the crown. 
The dermal tubercles are very minute, and are better 
shown in No. 48105 (fig. 5). There are also fossilized 
remains of the muscles, and a portion of those of the 
caudal region (mu) is so displaced as to have the false 
appearance of being a fin. Purchased, 1883. 
49518. Middle portion of fish, shown five ninths nat. size in Plato II. 
fig. 2. The metapterygium of the pectoral fin is weU 
displayed, with its cartilaginous rays ; and there is a 
distinctly thickened preaxial cartilaginous ray in the pelvic 
fin. Very singular is the fossilization of the muscles, not 
