RUIN OB ATIDiE. 
81 
the nasal capsule, which may probably be interpreted as 
pre-palatine. This is shown in PL III. fig. 3, pr.pa .; 
and the antorbital or post-palatine ( pt.pa .) is also seen, of 
much larger size. Purchased , 1878. 
49512. Left side of disk, ventral aspect, shown, of two thirds nat. 
size, in PI. III. fig. 2. The specimen is slightly distorted, 
and the extremity of the snout is broken away, though the 
form of this is distinctly traceable by the stain in the 
matrix. The first dorsal fin is seen, of the ordinary pro¬ 
portions, in the usual situation, at a considerable distance 
behind the pelvic fins. Purchased , 1878. 
49513. Imperfect large example, pectoral fin measuring CblS m. in 
length. Purchased, 1878. 
P. 4013, P. 4012. Two imperfect large examples, the pectoral fins 
measuring 0*24 m. in length. The former is described as 
R. grandis by J. W. Davis, loc. cit. p. 484; but neither of 
the specimens appears to exhibit specific differences from 
R. maronita, and the snout of the type specimen of 
R. grandis as figured, loc. cit., is evidently erroneously 
restored. Purchased , 1883. 
49510. Half of disk, doubtfully referable to a variety of R. maronita . 
This fossil is very imperfect, but appears to differ from the 
typical specimen in its greater breadth and the relatively 
larger size of the pelvic fins. Purchased , 1878. 
Rhinobatus tenuirostris, Davis. 
1887. Rhinobatus tenuirostris, J. W. Davis, Trans. Roy. Dublin Soc. 
[2] vol. iii. p. 487, pi. xix. fig. 1. 
Type. Nearly complete disk; British Museum. 
Snout extremely elongated and slender, its length in advance of 
the nasal capsule being twice as great as the breadth at the latter 
position. Rostral ridges separated by a narrow groove. Pectoral 
fins relatively broad, rapidly widening to the maximum breadth 
opposite their insertion. Body covered with fine, dense shagreen, 
apparently without large tubercles. 
Form. Loc. U. Cretaceous (Turonian) : Sahel Alma, Mt. 
Lebanon, Syria. 
P. 4770. Type specimen. Purchased , 1884. 
Gr 
