1(>2 ON THE PHYSIOGNOMY OF SERPENTS. 



on undivided scuta below the tail ; for a circle of small 

 ocular plates ; for a large eye, with a round pupil ; and 

 for very large mental plates. There are several long 

 teeth at the extremity of the lower jaw. S. 154 + 98. 13 

 rows of smooth scales, with the dorsals very large. Above 

 of a grey-puqDle, relieved on the flanks by about twenty 

 broad spots of a rose colour. Inhabits the interior of the 

 Isle of Java. 



17. DiPSAs CARiNATA. Of Small sizc. Head extreme- 

 ly wide and thick ; muzzle rounded and shorter than in 

 any other species ; lips projecting and curved ; eyes sur- 

 rounded by four plates ; geneial plates very voluminous. 

 15 rows of carinated scales, with the dorsals rather broad 

 and truncated at the tip ; teeth delicate and comb-like ; 

 bone of the cranium small. S. 168 + 60. Above of a 

 marrone-brown, with dark close-set bands ; a mark with 

 four points on the neck. From Java. 



18. Dips AS l/evis. Also from Java. Of smaller size 

 than the last, to which it has a resemblance, excejit that 

 it has all its features less marked, the form more heavy, 

 and the tail shorter ; that the body is covered with smooth 

 scales ; that it wants the frenal and inferior ocular plates ; 

 and tliat the occipitals are surrounded with a row of other 

 smaller plates. Of a deep brown colour, relieved on the 

 upper parts by black transverse bands. S. 158 -}- 37. 



19. DiPSAS LEUCOCEPHALA. Scalcs of almost the 

 same size, slightly truncated at the tip, and disposed in 

 19 rows ; abdomen faintly angular. Above of a gi'ey- 

 purple, marbled w^th bro^^Ti, and varied by about 50 dark 

 transverse bands ; form very slender. S. 244 + 108. 

 From Brazil. 



20. DipsAS MACRORHiNA. Of a Considerable size. 

 Form thin, yet robust ; head very thick ; muzzle very 

 broad, ahnost of equal diameter with the trunk, rounded ; 

 nostrils extremely open ; rostral plate advancing on the 

 top of the muzzle; anterior frontals small; 19 rows of 

 scales strongly carinated. S. 271 + 118. There are 

 grooved posterior maxillary teeth. Body marked with 

 alternate rings of black and white ; a white collar. Native 

 of Cayenne. 



