58 THE VOYAGE OF H.M.S. CHALLENGEE. 



Zygcena ^malleus, Eisso, (stuffed), Tongatabii. 

 Trygon kuhli, M. and H., Tongatabu. 

 Serranus disjxir, Playf., Tongatabu. 

 Mesoprion fulvijiamma, Forsk., Tongatabu. 

 Dules niarginatus, C. V., Papeuriri, Otaheiti. 

 CcBsio tile, C. V., Tongatabu. 

 Gerres oyena, Forsk., Tongatabu. 

 Holocentrum spiniferum, Forsk., Tongatabu. 



Caranx hippos, L., brackish water near Papiete, Tahiti. 



Caranx hippos, L. : Gthr., Fish., vol. ii. p. 449, and Fisch. d. Siidsee, p. 131, taf. Ixxxiv. 



Acantliurus (?), sp., young {Acronurns), brackish water near Papiete, Tahiti. 

 Eleotrisfusca, BL, Schn., streams and brackish water near Papiete, Tahiti. 

 Mugil helaarti, Gthr., Tongatabu. 



Mugil tongcB, n. sp. 



D. 4/-|-, A. f, L. lat. 45, L. transv. 16. The height of the body is one-fourth of the 

 total length (without caudal), the length of the head two-sevenths ; the snout is very 

 broad, the width of the interorbital space being a little more than two-fifths of the 

 length of the head. Eye with a broad adipose membrane. Lips thin ; the maxillary is 

 nearly entirely covered by the i3r8eorbital, only a narrow strip of its extremity being- 

 visible ; cleft of the mouth nearly twice as broad as deep ; the angle made by the 

 anterior margins of the mandibles slightly exceeding a right one. Anterior dorsal spines 

 half as long as the head, occupying the middle of the distance between the snout and the 

 root of the caudal. There are about twenty-six scales l)etween the snout and the spinous 

 dorsal fin ; the eleventh, thirteenth, and twenty- seventh scales of the lateral line corre- 

 spond to the extremity of the pectoral fin, and to the origins of the two dorsals. Colora- 

 tion uniform. Length of specimen, 6-| inches. Tongatabu. 



Gomphosus tricolor, Q. and G., Harbour of Tahiti. 



Anguilla aneitensis, Gthr., Lake Waihirra, Tahiti. A malformed specimen from 



Eiver near Lake Waihirra. 

 Anguilla mauritimia, Benn., Lake Waihirra, Tahiti. 

 OpMchthys maculosus, Cuv., Tongatabu. 

 Murcena nehulosa, Ahl., Tahiti. 

 Murcena richardsoni, Blkr., Tahiti. 

 Diodon hystrix, L., Tahiti. 



