36 1 



a. Maxillary teeth in one series 1 ). . . . M. (.) plcta p. 363. 

 /^.Maxillary teeth in two series M. (CP.) thyrsoidea p. 365. 



B. Mesial teeth on intenna \illary plate depressible^ more or less 

 slender fangs (Fig. 181). 



A. Posterior nostrils with an elevated tubi- 



form rim. Snout long and narrow, gape 



wide, twice in head. 35 40 teeth on 



each side of mandibles. Colour uniform. M. (G*.) schismatorhynchtis p. 366. 

 . Posterior nostrils without elevated rim. 

 I. Maxillary teeth in two or three series, the 

 inner one at least of 5 teeth, generally more. 



1. Cleft of mouth twice to nearly thrice in 

 head. Head 1.7 2.9 in trunk. Peripheral 



teeth of intermaxillary plate in two series. M. ((7.) meleagris p. 367. 



2. Cleft of mouth about ^/. 2 in head. Head 

 4 5 in trunk. Peripheral teeth of inter- 

 maxillary plate in two series M. (.) polyuranodon p. 369. 



3. Cleft of mouth 3.8 4.2 in head. Head 

 thrice or somewhat less in trunk. A single 

 peripheral series of teeth on intermaxillary 



plate M. (.) tile p. 370. 



II. Maxillary teeth in one series, or with an - 

 anterior inner series of I 4 fanglike ones, 

 which disappear with age. 



1. Head, trunk and tail with distinct dark 

 crossbands 2 ). 



a. About 30 irregular crossbands, partly 

 encircling the body, about as broad as 

 the interspaces, which are spotted in 



their dorsal part M. (G^} punctatofasdata p. 371. 



b. 17 24 crossbands, interrupted on the 

 belly, generally larger than the inter- 

 spaces. First band through snout . . . M. (.) petelli p. 372. 



c. 15 20 crossbands, encircling the body, 

 much narrower than the interspaces. 



First band through eye M, (.) ruppelli p. 372. 



2. Gillopenings in a dark brown or black 



patch. Head more than 33.5 in trunk. M. (.) flavimarginata p. 374. 



1) In very young specimens in 2 series. They can however easily be recognised on 

 account of their colour, which is yellowish with rows of dark spots or small circles. 



2) In old specimens the bands are sometimes only distinct on head and 

 dorsal part of trunk and tail. 



