LEPTOCKPIIALlDiE. 140 



anus not being in the middle of the total length, and by the dis- 

 tance from the tip of the snout to the anus being contained twice 

 and seven-tenths in the whole length of the fish. Two rows of 

 dots run along the edge of the belly, more crowded towards the 

 anus and surrounding that orifice. One row of black dots also 

 extends along the roots of the anal rays. This is a slender, nearly 

 linear fish. 



Total length 3-31 in. 



From the point of the snout to the small gill-opening 0-39 „ 



„ „ anus . . . 1*2Q „ 



Length of the pectoral fin .... . 0-08 ,, 



,, caudal fin . . . . . . 005 „ 



From the point of the snout to the dorsal fin, 0-63 to 007 „ 



10. Leptocephalus Gegenbauei, Kaup, fig. 11. 



Difiipi. Teeth scarcely perceptible. No rows of dots on the 

 lateral line. Anus situated nearly in the middle of the total 

 length. Caudal fin blunt, with distinct rays. 



Descr. This species was also discovered at Messina by Professor 

 Kolliker, who had the goodness to send me a specimen. It nearly 

 resembles Bibroni, but is more slender, and the anus is in the 

 middle of the length, which is not the case with Bibroni. From 

 diaphanus it is distinguished by its higher body, longer snout, 

 and the more developed blunt caudal fin. 



Total length 4 2 5 in. 



Distance to the anus ...... 2'21 ,, 



Height of the body 0-43 „ 



11. Leptocephalus Bibroni, Kaup, fig. 12. 



Diagn. Without visible teeth, and no rows of dots on the lateral 

 line. The distance to the anus goes once and three-quai'ters in the 

 total length. Caudal fin blunt, with distinct rays. 



Descr. For an example of this species, also, my thanks are due 

 to Professor Kolliker, as well as for Yarellii and Gegenbauri. It is 

 a little more slender than Gegenbauri, and its anus is conspicuously 

 farther back. 



Total length . . . . . 4-14 in. 



Distance to the anus ...... 2-30 „ 



Height of the body 0-51 „ 



12. Leptocephalus Yarellii, Kaup, fig. 13. 



Diagn. Short, visible teeth ; blunt caudal fin ; and anus in the 

 distal third of the length. 



Descr. This species, named after my highly-esteemed friend, 

 Mr. Yarrell, has much likeness to Bibroni, but is distinguished 

 from it by the presence of teeth, and the more distal anus. L. 



