228 BURifA, ITS PEOVLE AND PRODUCTIOXS. 



SympliTsial lower canines. Dorsal fins usually equal in heij^lit. Colour brown, 

 witli small black spots. Fins blackish. Caudal wholly white or a white base only. 

 The Andamans and Nicobars. 



G. cmuxus, lliipp. 



D. 6 tV; p. 20; Y. i; A. ^i, ; C. 13. 



Teeth in a single row above. A posterior enlarged row in the mandible, the 

 external of which is a recurved canine-like one. Dorsals of equal height. Colour 

 yellow. A blue-edged horizontal streak goes along the bases of the dorsal and anal 

 fins. There are four similar vertical bands, two descending from the eye, one from 

 the head to the opercles, and a fourth in front of the pectoral fins. A black spot on 

 the opercle. 



The Andamans and Nicobars. 



SicYDiuii, C'mier ct Valcnci'nnes. 



Branchiostegals 4. Pseudobranchia;, a slit behind the fourth gill. Upper jaw 

 rather prominent, containing a single row of small teeth, implanted in the gums. 

 Two dorsal fins. Veutrals united, forming a disk, more or less adherent to the belly. 

 Air-vessel absent. 



S. FASCIATUM. 



B. iv.; D. 6 tV; p. 17; V. 0; A. 11 ; C. 13. 



Snout overhangs. No barbels. The inner teeth in the mandible large, recurved, 

 distant, with two symphysial canines and a minute row of sharp teeth on the lower 

 lip. Colour reddish-brown, with six dark vertical bands on the body, and some dark 

 spots. Below dirty yellowish brown. Fins blacUish, pale-edged. Grows to 2;^ inches. 



Burma. 



ArocRrnts, Ciivier et Valenciennes. 



Branchiostegals 4. Pseudobranohire rudimentary. Teeth conical in a single 

 fixed row in either jaw, and usually a p;iir of lower symphysial canines behind the 

 fixed row. Ventrals united, forming a tlisk. Two dorsals. 



A. BATOiDEs, Day. 



B. iv. ; D. 6 : 23 ; P. 21 ; Y. i ; A. 23 ; C. 13. 



Eight or ten pointed brown teeth on either side of both jaws. Two moderate 

 posterior canines in the mandible. Dorsals of equal height. Caudal lanceolate. 

 Colour greyish above, wliitish below. Fins without marks. 



Maulmain. 



This species differs from A. bato (which has notched teeth) by its sharp ones. 



ArocRTPiicnTHTs, Day. 



Branchiostegals 5. Symphysial canines in the upper jaw only. 



A. Cantoris, Day. 



B. v.; D. 6-27; P. 19; Y. J; A. 26; C. 17. 



An angular pendulous flap of skin from tlie preorbital falls down below the 

 teeth on the side of tlie upper jaw. No barbels. Thirteen elongated and curved 

 teeth on either side of both jaws. The two upper central ones curving down beyond 

 the lips. Head scaleless. Colour greyish olive ; first dorsal dark and longitudinally 

 banded. Caudal dark, superiorly spotted. 



The Andamans. 



PERIOPHTnALMUS, Bl. Schl. 



Branchiostegals 5. Pseudobranchia3 rudimentary. Body elongated, subcylin- 

 drical in front. Profile above the eyes very steep. Eyes close together, jirominont, 

 with well-developi'd lids. Two dorsal fins. Yentrals partly united. Caudal obliquely 

 truncated below. Air-vessel absent. 



The I'eriophihalmi are capital climbers and walkers on the mud l/y means 



