Fishes of the Family Stromateiclge. 201 



^Lirus rotundlcauda. 



Centrolophus rotundicauda, Costa, Anu. Mus. Zool. Xap, vi. 1806, p. 84, 

 tab. i. 



Depth of body 3 times in total length, length of head 3f 

 times. Snout as long as the eye, the diameter of which is 4 

 times in the lengtli of head. 1). VIII 28, the rays gradually 

 increasing in length to the last, which is equal in length to | 

 the depth of the body below, and when laid back extends to 

 the base of the caudal. A. Ill 18. Pectorals as long as 

 ventrals, f the length of head. Caudal slightly emarginate, 

 with rounded lobes. Sc. 85/30. Dull greenish above, silvery 

 below, with obscure darker patches. 



Total length 300 millim. 



A single specimen from tlie Bay of Naples. 



It seems chiefly to differ from L. ovalis in the form of the 

 dorsal fin. 



*Lirus japonicus. 



Centrolojihttsjapomcus, Ste'ind. Denk. Ak. Wien, xlix. 1885, p. 183. 



Depth of body about equal to the length of head, about 3 

 times in the total length. Snout | of the eye-diameter, which 

 is 3 times in the length of head and equal to the iuterorbital 

 width. Maxillary extending to below the middle of the eye. 

 Prseoperculum denticulated. D, VIII 22, the spines short 

 and weak, the last the highest and ^ the length of head ; 

 anterior soft rays highest, 2| times in the length of head. 

 A. Ill 19. Pectorals reach the anus. Ventrals inserted 

 behind the pectorals, reaching halfway to the anal. Scales 

 small, rather deciduous, 98-100 in a longitudinal series. 

 Lateral line decurved, becoming straight above the origin of 

 the anal. Grey-brown, dark above, clear below. 



Total length 420 millim. 



Seas of Japan. 



Lirus paucidens. 



Lirus paucidens, Qiiuther, ' Challenger ' Pelagic Fishes, p. 11, pi ii, 

 (1888). 



Depth of body 2 to 2;^- times in total length, length of head 

 2^ times. Snout shorter tlian eye, the diameter of which is 

 about 3 times in length of head, less than iuterorbital width. 

 Maxilla reaches to nearly below middle of eyo. Caudal 

 peduncle as long as deep. D. VII 23-24 ; the spines in- 

 crease in length to the third, the rest subequal, tiie first soft 

 ray much higher than the last spine, the soft fin rounded, 



