ON THE FISHES FROM THE MALDIVE ISLANDS. 279 



PLECTOGNATHI. 

 Fam. Sclerodermi. 



58. Balistes niger, Mungo Park. Haddumati, 40/ 



59. Monacanthvs nasicornis, Schleg. Suvadiva, 37/ 



60. Monacanthus oculatus, Gthr. S. Nilandu, 30/. 



61. Monacanthus choirocephalus, Blkr. Suvadiva, 43/, and Mulaku, 27/ 



62. Monacanthus sp. Suvadiva, 45/ 



D. 24; A. 24. Dorsal spine barbed. Ventral spine moveable. The specimen is too small 

 for determination of the species. 



63. Ostracion cornutus, Linn. N. Male, 35/ 



The specimen is 24 mm. long, and differs from the adult in having a well-developed 

 spine on the back, in the lesser development of the antorbital and ventral spines, and in 

 having a more projecting snout. A similar specimen in the British Museum Collection is 

 labelled Ostracion cornutus. 



Fam. Gymnodontes. 



64. Tetrodon sp. S. Nilandu, 36/ 



D. 8 or 9; A. 6 or 7. The back is broad, snout equal in length to the diameter of the 

 eye and also to the interorbital width. A simple perforate nasal tentacle on each side. Body 

 covered with three-rooted spines, except on the tail. Purplish brown above, lighter beneath ; 

 small brown spots on the back. The single small specimen almost certainly belongs to a 

 hitherto undescribed species. 



65. Tetrodon valentini, Blkr. Haddumati, 40/ 



II. FISHES TAKEN IN FRESH-WATER POOLS. 



There are 14 specimens belonging to 6 species, two of which have not been described 

 before. They are mostly marine fishes which are known to ascend estuaries into fresh-water, 

 or are allied to fishes with this habit, only one being a true fresh-water fish. A list of 

 the species follows. 



ACANTHOPTERYGII. 



Fam. Percidae. 

 1. Gerres maldivensis, n. sp. 

 D. IX. 10, A. III. 8 ; Sc. 40^^^. 



Depth of body 2^ times in the total length, length of head 2f times. The length of 

 the snout is equal to the interorbital width and f the diameter of the eye, which is con- 

 tained 2| times in the length of the head. The maxilla extends to below the first third 



G. - 36 



