irilTllYOLOUY. 279 



M. Scnui.TZEi, Elccker. 



UpptT jaw soiufiwhat tlio lonijor. Teeth in jaws, in (lirce rows, pointed, tlus 

 inner the larger. I'alatine teeth in two rows, obtuse, lirownish above, yellowibU 

 green below. 



The Andamans. 



OpnrcuTnYs, Ahl. 



Snout produced. Teeth in jaws and on vomer. Nostrils labial. Tongue not 

 free. No scales. 



0. COLUBIlINfS, Bddd. 



Eyes rather small, behind the gape. Snout pointed. Teeth in two rows, 

 obtuse. 2.5 to 35 brown rings encircle the body, sometimes with a spot in the inter- 

 space between each ring. 



The Andamans. 



11. liriiiuhial o^xniiir/^ in (lir pliarynx, narrow slits. 



MOKJENA, Artoili. 



Body elongatcil. (iill openings narrow. A tubular nostril on either side of the 

 npper surface of tlic snout. The posterior nostril with or without a tube, and 

 between or in fnjut of the eyes. Pectoral liu absent. 



a. Teeth pointed. The posterior nostrils not fiibit/iir. 

 M. Rlppellu, ^lacClelland. 



Teeth in a single row. 20 to 23 in either ramus of mandible. Canines moderate. 

 Yellowish, with 18 to 20 black rings round the head and body, narrower than the 

 intcrispaces. The mouth can be completely closed. 



The Andamans. 



M. EETICULARIS, Blocll. 



Teeth in a single row, some slightly serrated. About 13 in either mandibular 

 ramus. Canines small. The mouth can he completely closed. Head and back 

 spotted, and dotted with brown ; about IG cross bands on the body, wider than the 

 interspaces, and most distinct below, and ou the tail. 



The Andamans. 



M. UNDULATA, Laccp. 



Teeth in a single row, occasionally two inner ones on the maxilla. Pour pairs 

 of canines in the mandible, and 18 or 20 in either ramus. Two canines in the 

 maxilla. Light brownish, with irregular-sized blotches, and light reticulated lines 

 over the body, most distinct behind. No black gill spot. No white edge to fins. 



The Andamans. 



b. I'eefh in Jaws pointed ; on the vomer, globular. 

 M. THTESoiDEA, Ricliards. 



Teeth conical and in two rows on the maxilla, and 23 on either mandibular 

 ramus. No large canines. The mouth cannot be completely closed. Light brown, 

 covered with closely-set purplish spots, with reticulated light lines. No white edge 

 to fins. 



The Andamans. 



c. Teeth obtuse. 



M. KKiKA. 



Teeth in two rows on the maxilla (the inner pointed), and in three rows of 20 

 in each ramus of the mandible. Uniform black. 

 The Andamans. 



