GENERA AND SPECIES. 135 



Scyllium. Plates xxix. and xxx. SCYLLIID&. 



230. canicula, ROUGH HOUND. Anal ends under space between 



dorsals. 



231. catulus, NURSE HOUND. Anal ends under middle of second 



dorsal. 



The Rough Hound has the first dorsal in the middle of the back, 

 nearly half way between the ventrals and anal. The ventrals are 

 wide apart ; in the male their inner edges are united nearly all along, 

 but in the female for only two-thirds of their length. The nostrils 

 are nearer to mouth than to end of snout ; the nasal flap is single. 

 The colour is greyish or yellowish red, with blotches and spots ; the 

 length reaches 42 inches. This shark feeds on fishes and molluscs, 

 and keeps mainly to the bottom in sandy ground. When caught it 

 turns its tail in a half coil round the object that holds it, and uses 

 its rough skin as a rasp. Its egg-case is rather slender, with 

 slender arms and filaments. 



The Nurse Hound has the dorsal farther back; the ventrals are 

 close together, and the nasal flap is double. The colour is a brownish 

 or reddish grey, with large spots arid blotches ; the length reaches 5 

 feet. This is a deeper-water species than the other, and more frequent 

 in rocky ground. Its egg-case is stouter, with broader, stronger 

 arms and filaments. 



Sebastes. Plate iii. SCORP&NIDJE 



19. norvegicus, BERGYLT. Body and fins bright orange red. 



The dorsal is in two distinctly curved portions, the first with 15 

 spines, the second with 15 rays. In the anal are three spines and 8 

 or 9 rays, in the caudal 13 rays, in the pectorals 20, in the ventrals 

 one spine and 5 rays. The caudal is cut square. The gill covers 

 are spiny ; the lower jaw is the longer ; the mouth extends to the 

 middle of the eye, or beyond. This is a rare fish, reaching 4 feet in 

 length, frequenting rocky ground in deep water, feeding on crusta- 

 ceans and flat fishes. It is stated to be viviparous. Its colour 

 makes it easy of identification. 



Selache. Plate xxix. LAMNID&. 



221. maxima, BASKING SHARK. Snout porous and projecting like a 

 beak. 



This large shark is of large girth. The second dorsal is small, but 

 larger than the anal, the first dorsal is halfway between the pectorals 

 and ventrals. There is a pit at the base of the caudal, and the tail 

 is keeled. The teeth are in 4 or 6 rows, small and conical, and have 

 smooth edges. The gill-slits are long and of almost equal length. In 

 colour it is dark brown or blue above, lighter below, the long snout, 

 which begins behind the eye, and projects for some distance beyond 

 the upper lip, being of a red tint on its upper half. The specimen at 

 South Kensington is 29 feet 10 inches long. It is said to feed on 

 seaweed and other soft stuff, including eggs ; in fact it is mainly a 

 vegetarian shark, and looks as though it did well on its diet. 



