304 MR. S. C. SARKAR ON THE BUCCAL GLANDS 



the length of the tooth. The alternate teeth are hinged and 

 fixed. The mandible contains about thirteen teeth ; they are 

 also larger in front, gradually diminishing behind. The 



Text-figure 6. 

 f, PS 



slg. 



Difsas trigonata. Dissection of head from the right side. f. fang ; i.l.g. inferior 

 labial gland ; ^.g. parotid gland ; s.l.g. superior labial gland. X 3. 



Harderian gland consists of three lobes, two within the orbit 

 and the larger part outside. 



Genus Chrysopelea. 



Chrysopelea ornata. (Text-fig. 17.) 



The poison gland is very small, smaller than in any opistho- 

 glyphous snake I have examined, and it occupies a small area 

 posterior to the eye. The smallness of the gland may be due to 

 the huge growth of the eye. The superior labial gland is well 

 developed, and extends posterioily further than the angle of the 

 jaw and anteriorly to the very end of the maxilla. The lobules 

 of this gland are larger than those of the poison gland. The 

 inferior labial gland is also fully developed, and is broader at the 

 posterior side. The maxilla contains twenty teeth ; the first 

 three are very small, and they increase in size posteriorly ; the 

 last two are grooved. The groove is situated on the outer side 

 and is widely open. It arises almost from the base of the tooth, 

 and ends about one-eighth of the length of the tooth from the 

 apex. In section the teeth are nearly oval in shape. The 

 mandible contains twenty-two teeth : the first is very small ; 

 there is an increase in size up to the seventh, which is the 

 largest, and then a gradual decrease. Both maxilla and mandible 

 show the alternately fixed and hinged ai'rangement of teeth. 



