180 PROCEEDINGS OF THE ACADEMY OF [April, 



Dendrophis formosus Boie. 

 One, Kapuas river. 



Dendrelaphis caudolineatus (Gray). 



Eight speciineus; Kapuas river, Kuchiug, Baram. 



Ko. 2,378, from Baram, 1,160 mm. (tail 300), ventrals 183, 

 subcaudals 97, is dark bluish-black with obscure lateral stripes; 

 belly slate color. 



Simotes octolineatus (Sclin.t. 



Due, Sarawak ; two, Baram ; one, Borneo. 

 Ablabes tricolor (SchL). 



One, Borneo. 

 Calamaria vermiformis T>. and B. 



Two, Borneo. 



No. 5,816 has the body completely encircled by alternating rings 

 of brownish-black and pale-yellow, the dark rings being widest on 

 the back and the light ones exactly the reverse ; whole head ])a\e- 

 yellow; length 172 mm. (tail 13). This corresponds to the form 

 described by Guuther as C. flaviceps. 



Hypsirhina enhydris (Schn.). 



Two, Kapuas river. 



No. 2,561 has ventrals 157; subcaudals 31. 

 Hypsirhina dorise (Peters). 



No. 2,311, Kapuas river. 



The example which I refer to this species corresponds nearly to 

 Peters' description and plate. It has, hoAvever, but 27 rows of 

 scales. The head shields are quite anomalous ; the left internasal 

 is divided, as is also one of the parietals, and the anterior temporal 

 on one side. Length 810 mm. (tail 95); ventrals 160; sub- 

 caudals 44. The yellow of the ventral surface extends to the four 

 outer rows of scales, where it becomes reddisli, as it does ou botli 

 .series of labials. 

 Dipsadomorphus dendrophilus (Boie). 



Three, Borneo. 

 Dipsadomorphus cynodon (Boie). 



Two, Baram; one, Kapuas river; one, Borneo. 

 Psammodynastes pulverulentus (Boie). 



No. 2,569, Kai)uas river, length 625 nun. (tail 128); ventrals 



