lib GENERA AND SPECIES. 



stripes along the sides above and below the lateral line. The 

 caudal is often banded. This is the common Red Mullet which 

 comes in with the mackerel in shoals in the summer, but spends 

 most of the year out at sea. It reaches the same size as the other, 

 but is generally smaller. 



Mursena. Plate xxii. MUR&NID&. 



168. helena, MURRY. Purplish brown with yellow markings. 



The vertical fins of this brightly-coloured Eel are continuous, and 

 together have about 550 rays. The snout is pointed; the month 

 ends in a black spot, and extends behind the eye, the upper jaw 

 being the longer. The gill opening is in a black spot. In length 

 this species reaches 52 inches. It is of very rare occurrence in 

 British waters. 



Mustelus. Plate xxviii. CARCHARIIDJE. 



225. vulgaris, SMOOTH HOUND. Dorsals far apart ; anal under second 

 dorsal. 



The pectorals are under the last three gill slits ; the first dorsal 

 is behind the pectorals ; the ventrals are halfway between the 

 pectorals and the anal, and the anal is under, but begins rather 

 behind, the second dorsal ; caudal notched at tip. The colour is 

 bluish, with or without spots, lighter below. The length is from 

 3 to 6 feet. It swims near the ground, and comes in-shore in the 

 summer months, retiring to deep water in the winter. Though not 

 sought after this shark is not wasted, as it is used up among the 

 " snacks " in fried-fish shops. 



Myliobatis. Plate xxxiii. MYLIOBATID&. 



250. aquila, WHIP RAY. No horns ; tail very long, with serrat. d 

 spine near the roc t 



The disk is diamond-shaped, nearly twice as broad as long, with 

 undulating edges. On the tail is a small square dorsal, the serrated 

 spine being just behind it. The tail is like a whip. The teeth are 

 hexagonal and in 7 rows. The colour is white below, greenish 

 above ; the head and backbone being clearly shown. This fish, 

 often known as the Eagle Ray, from its appearance when swimming, 

 has been found as much as 50 inches in length. It is active in its 

 habits, and swims much faster than would be supposed. 



Naucrates. Plate iv. CARANGIDJE 



25. ductor, PILOT FISH. Body blue, with 5 or 6 broad dark vertical 

 bands. 



The Pilot Fish has from 3 to 6 spines representing the first 

 dorsal, and a spine and from 26 to 28 rays in the second dorsal ; the 

 anal has 2 isolated spines in front, and then from 26 to 28 rays ; the 

 caudal has 17 rays, the pectorals from 19 to 21, and the ventrals a 



