FISHES. CHONDROPT. 
172 
Raia. 
dark brown ; beneath, dusky grey, with dark spots. Snout conical. Teeth 
sharp, with a broad base. 
3 25. R. aspera. Shagreen Ray. — Skin rough. Ridge of the 
tail destitute of spines ; those in the row on each side projecting 
outwards and recurved. 
Will. Ich. 78 — Shagreen Ray, Penn. Brit. Zool. iii. 87 R. chagrinea, 
Mont. Wern. Mem. ii. 420. tab. xxi — JE', White horse, Duncow, French 
Ray. — On the English coast. 
Length about 3 feet. Snout long, spinous. Colour, above, cinereous- 
brown with black spots; beneath, white. The whole upper surface very 
rough. Spines near the eyes. A short row of spines on the dorsal ridge, 
immediately behind the eyes. 
26. R. oculata. Mirror Ray. — Skin smooth above and be- 
low, except on the margin of the pectorals. Three rows of 
spines on the tail, the mesial one reaching a short way up the 
back. 
R. Isevis oculata, Will. Ich. 72. — R. miraletus, Don. Brit. Fishes, tab. 
ciii — On the English coast. 
Length about 10 inches. In form resembling the skate. Aculeated near 
the eyes. A large ocellated spot on the pectorals. Colour, above, brown, 
with distant large dark spots. IVIontagu included this species and R. rubus 
under the title R. maculata. 
< 27. R. marginata. Bordered Ray. — Belly white^ surround- 
ed with a black margin, except at the head. 
La Raie bordee, Lacepede., Hist. Poiss. v. 663, t. xx. f. 2. Liv(^|gl and 
Brighton, Noel. ^ 
This species, of which a description was communicated by M. Noel to the 
ichthyologist quoted, seems to be of a small size. The snout is pqjqted and 
translucent. Skin of the back yellow. Three rows of spines on the tail. A 
spine behind each eye ; a single dorsal tin on the tail, and a caudal tin. 
.j 28. R. Cuvieri. Cuvierian Ray. — The first dorsal fin on the 
middle of the back. 
Lacepede., Hist. Poiss., i. tab. vii. f. 1. Neill, Wern. Mem. i. 554. 
Snout pointed. Tail slender, armed with three rows of spines, the middle 
one reaching to the tin on the back. This tin is longer than broad, suboval, 
and contracted at the base. Teeth blunt. This species was first procured from 
the Seine by Baron Cuvier in 1792, who communicated a drawing and descrip- 
tion of it to Lacepede. It has once occurred on the Scottish coast in the 
Frith of Forth in 1808, according to Mr Neill, who examined a putrescent 
specimen, which had been detected among a cargo of thornbacks, and who has 
since presented to me the remarkable dorsal fin, the only portion which was 
preserved. 
Gen. XVI. CHIMiERA. Rabbjt-Fish.^ — Snout conical. 
Two broad incisors in each jaw. 
29. C. monstrosa. — Colour silvery-white, marbled with 
brown. 
