520 SQUALID/E. 



lence as to become a difficult as well as a dangerous capture. 

 This species has the smallest teeth in proportion to its size 

 of any of the Sharks. No remains of fish have been found 

 in its stomach. One examined by Mr. Low contained a red 

 pulpy mass, like bruised crabs, or the roe of Echini. Mr. 

 Low adds, that this Shark's appearance, manners, and wea- 

 pons do not indicate it to be a ravenous fish. Linnseus says 

 that its food is Medusa, and Pennant considered that it sub- 

 sisted on marine plants. 



The body is thickest about the middle, and diminishes 

 towards both extremities ; when afloat the form is nearly cy- 

 lindrical ; the skin thick and rough, of a brownish black 

 colour, with tints of blue. The head conical, the muzzle 

 short, rather blunt, smooth, and pierced with numerous circu- 

 lar pores ; eyes near the snout, small, oval, the elongation 

 horizontal, the irides brown ; half-way between the eye and 

 the first branchial opening is the temporal orifice, oblique and 

 small ; branchial openings five on each side, of great vertical 

 length, each set including the whole side of the neck, and 

 leaving only a small space above and below ; nostrils oval, 

 small, placed rather laterally, and opening on the edge of 

 the upper lip, pectoral fins of moderate size for so large a 

 fish, perhaps, as before stated, the largest of the true fishes, 

 the form somewhat triangular, placed close to the last bran- 

 chial orifice, convex anteriorly and thick, slightly concave 

 and much thinner behind ; the ventral fins also of moderate 

 size, rather elongated at the base, placed behind the middle 

 of the whole length of the fish, convex in front, concave be- 

 hind, the inner and posterior half free, exhibiting in the 

 figure chosen the cylindrical appendages peculiar to the male. 

 The first dorsal fin, placed before the middle of the whole 

 length of the fish, is much the larger of the two, forming an 

 elevated triangle ; anterior edge but slightly convex, posterior 

 edge concave, with an elongated point at the base directed 



