68 THE VOYAGE OF H.M.S. CHALLENGER. 



in four small hooks, tlu^ee of which are directed upwards, the fourth being on the outer 

 side of the spine and pointing forward. The females have the first dorsal spine prolonged 

 into a much shorter filament than the males, but all have the large black sublunate spot 

 between the third and fourth dorsal spines. Caudal fin with rather distant small black 

 drops arranged longitudinally ; caudal fin but little longer than the head, obtusely 

 rounded. In the males the dorsal spines and caudal rays are much prolonged, and the 

 greater portion of the first dorsal fin is whitish, with large ovate black spots, Length 

 of specimens, 2 to 6 inches. Inland Sea, Japan. Yokohama Bay ; 1 5 fathoms. Kobe. 



Chirus liexagrammus, Pall., Inland Sea, Japan, Market of Yokohama. 



Agram^mus schlegeli, Gthr., Market of Yokohama. 



Centronotus nebulosus, Schleg., Inland Sea, Japan, Market of Yokohama. 



Mugil joyneri, Gthr. (Ann. and Mag. Nat. Hist., 1878, vol. i. p. 486). 



D. 4/-J, A. f, L. lat. 40, L. transv. 14. The height of the body is less than the 

 length of the head, which is two-ninths of the total (without caudal). Eye small ; its 

 diameter is one-seventh, the width of the interorbital space more than one-third of the 

 length of the head. Adipose eyelid none ; prseorbital emarginate and denticulated ; 

 snout longer than the orbit ; extremity of the maxillary visible. There are eighteen 

 scales between the snout and the origin of the spinous dorsal ; no elongate scale in the 

 axil. Dorsal fins equal in height ; the sjoines are rather slender, the length of the first 

 being rather more than three-fourths of the postorbital part of the head ; it is much 

 nearer to the end of the snout than to the base of the caudal fin. _ The first two rays of 

 the soft dorsal are scaly, the rest of the fin being devoid of scales ; anal scaly anteriorly, 

 as high as the soft dorsal, and commencing in advance of that fin. Caudal notched, 

 one-seventh of the total length. Pectoral two-thirds of the length of the head. Axil 

 without spot. 



This species was not contained in the Challenger collection, but may be enumerated 

 here for completeness' sake. It was discovered by Mr H. B. Joyner at Tokei. The 

 specimens are 12 inches long. 



Fistularia serrata, Cuv. (PL XXXII. fig. C). 



Fistulana serrata, Cuv., Gthr., Fish., vol. iii. p. 533. 



Dr Steindachner has recently directed my attention to certain diff"erences in the 

 sculpture of the head which he observed in a small series of examples from Japan, and 

 the constancy of which I have been able to confirm in the series in the British Museum. 

 It appears that two species were confounded by previous authors, and none of the various 

 names used by them were given with the intention of distinguishing those two species ; 



