0. scoPKr.Fs. 405 



The species may be referred to the following subgenera : — 



A. The anal fin has more rays than, or as many as, the dorsal. 



a. Eye large, one-third or more than one-tliird of the length of the 



head ; no spine above the orbit. 

 a. Scales smooth : Mi/ctophum, m., p. 405. 

 ^. Scales denticulated : Dasyscopelm, ni., p. 411. 



b. Eye large ; a horizontal spine above the orbit : Ceratoscopelm, m., 



p. 412. 



c. Eye of moderate size, less than one-third of the leng-th of the head. 



a. Scales smooth, those of the lateral line much larger than the 



others : Alysia, Lovre, p. 41;J. 

 /3. Scales smooth, subequal in size : Lantpamjctus, Cocco, p. 414. 

 y. Scales covered with minute spines : Ncoscopelus, Johnson, p. 414. 



B. The dorsal fin has more rays than the anal. 



a. Scales of the lateral line considerably larger than the others, p. 415. 



b. Scales of the lateral line not nmch larger than the others : Noto- 



scopelus, m., p. 415. 



A. The anal fin has more rays than, or as many as, the dorsal. 



«. Eye large, one-third or more than one-third of the length of the head ; 



no spine above the orbit. 



a. Scales smooth. 



1. Scopelus rissoi. 



Scopelus rissoi, Cocco, in Giorn. SIcil. fasc. 77. p. 144, and Lett. s. 

 Salmon, p. 15. tab. 2. fig. 5 ; Bunup. Faun. Ital. Peso. c. fig. ; Cuv. 

 fy Val. xxii. p. 440. 



D. 13-14. A. 17-18. V. 8. L. lat. 32. L. transv. 2/4. 



The height of the body is contained thrice in the total length (with- 

 out caudal), the length of the head twice and two-thirds ; the least 

 depth of the tail is one-third of the height of the body ; the depth 

 of the head equals the distance between the anterior margin of the 

 orbit and the end of the gill-opening. Eye very large, its diameter 

 being contained twice and two-thirds in the length of the head ; 

 the distance between the posterior margin of the orbit and the pric- 

 opercular edge is one-fourth of the diameter of the eye. Snout very 

 short and obtuse, its upper and lower profiles being nearly equally 

 curved. Cleft of the mouth oblique, \\-ith the lower jaw scarcely 

 prominent beyond the upper ; the maxillary reaches to the angle of 

 the pneoperculum and terminates in a triangular dilatation. The 

 origin of the dorsal fin is a little nearer to the root of the caudal than 

 to the extremity of the snout, and behind the base of the ventral : its 

 last ray is in the vertical from the fourth or fifth anal ray. Tlie 

 pectoral fin extends to the anal. Scales smooth, those of the lateral 

 line being much elevated, but short ; there are six scales between tlie 

 adipose and caudal fins. No pearl-coloured spot on the back of the tail. 



Mediterranean ; Madeira. 



n-b. From one to two inches long. Mediterranean. 



