1818.) NEW SPECIES OF FISHES. 223 



Body elongated, with a slight elevation, and narrow at 

 the tail; spiracles distant from the eyes, and more elevated; 

 eyes small, round, and situated laterally; the pectoral fins, 

 which were larger than the others, except the caudal, were 

 four inches at the base, and at most five inches in length. 

 This individual, from the end of the snout to that of the 

 tail, was six feet five inches long; and we may regard it 

 as a sliark with very small fins, whence its motion must 

 be slow, and confined to the bottom, there sluggishly 

 seeking its prey. 



Skin rough, beset with triangular, curved, striated 

 and pointed asperities. 



Colour of the entire body a pale lead gray, somewhat 

 darker on the back. 



SQUALUS, or Shark. 

 Spiracles none. With anal fins. 



Sc^UALUs obscurus. Dusky Shark. 

 Plate IX. 



Tail with a carina undulated above, and slightly 

 emarginated at the base; pectorals long, narrow, and fal- 

 ciform; dorsals and anals projecting backwards in a point; 

 second dorsal opposite to the anal, the latter bilobed. A 

 white spot on each side of the neck. 



Head flat and broad; snout sharp -edged, rounded and 

 wide at the end; eyes lateral, large, orbicular, pupil trans- 

 verse^ narrow, with a nictitant membrane originating be- 

 low: Z>rfl'72c/izfl/ apertures five, unequal, the first very large, 

 the ^last very small^ and situate above the origin of the 

 pectoral fins; nostrils oblique^ and partially covered by a 

 hhort, pointed appendage on the margin, near the end of 



