THE FISHES. 



199 



Their condition does not permit of a figure or detailed description being given, but 

 they may conceivably be referable to Scopelus rafinesqul *. 



" Periscope " Larva. (Fig. 5.) 



Fig. 5. 



'• Periscope " larva 12 mm. in length, with view of head seen from above, and views from above and the 

 side of head of a smaller example 9 mm. long. Diagrammatic camera luoida sketch, x 9 ca. 



This larva occurred as follows : — 



25 k. One, 6"5 mm. 



30 h. One, 5 mm. 



30 /. Two, 9 and 12 mm. 



31 b. One, 7 mm. 



32 m. One, 8"5 mm. 



32 0. One, 4'5 mm. 



33 c. One, 5 mm. 

 35 b. One, 4 mm. 



Other specimens, possibly referable to the same form, were present in two other 

 hauls. 



It is a larva of the same type as that described by Lo Bianco (Mitth. Zool. Stat. 

 Neap. xvi. p. 109 [1903]), and a comparison with Holt's figures {loc. cii.) of Scopelus 

 glacialis and the larva termed by us " R 2 " suggests that it certainly belongs to 

 the family Scopelidae, and not improbably to some species of Scopelus. 



Our smaller material shows no diagnostic characters beyond the form of the head and 

 eyes, and is not in good condition. 



Our diagrams of a specimen 12 mm. long and of the head of a smaller specimen of 

 9 mm. sufficiently show its characteristics at these sizes. The pedunculate character of 

 the eyes in the younger examples has probably no exact value in classification, as we 

 meet with exactly the same character in another larva (not taken by the ' Research '), in 

 which the abdomen extends almost to the posterior exti-emity. 



* S. punclatiis, being very abundant at times off the south-west of Ireland, may not improbably be the 

 ])aront of one of the species of larvae. 



34,< 



