820 MR. G. S. WEST ON THE BUCCAl GLAKDS AND [Nov. 19, 



(JPl. XLV. fig. 11) possesses 14 teeth. The 3 anterior ones are of 

 small size and separated by moderately large diastemata, then 

 follow 8 closely-set teeth of slightly larger size, and after a small 

 interspace the 3 posterior teeth. These latter do not form a 

 continuous series with the others, but are set along the edge of 

 the posterior expanded end of the maxilla. The first two are 

 large and grooved, but the third is very small and solid. This is 

 the only case I have yet met with in Opisthoglyphous Snakes 

 where a solid tooth follows the grooved ones. 



The poison-gland of L. annulata is clearly defined from the 

 superior labial gland, and is of the more usual form. The 

 Harderian gland is not externally visible on removal of the skin 

 as in L. rufescens (PI. XLV. fig. 13). The maxilla (PI. XLV. 

 fig. 14) has 9 small, rather stort teeth of uniform size, followed 

 by 2 posterior large and rather straight grooved fangs. There 

 are 9 mandibular teeth. 



Genus Homalopsis. 



Species examined : — H. buccata. 



The poison-gland in this Snake is very clearly defined and 

 somewhat sigmoid in form. The superior labial gland does not 

 extend so far back as usual, but is otherwise rather extensive. 

 The inferior labial gland is also of considerable bulk, and all three 

 glands exhibit a marked lobulation (PL XLV. fig. 20). The 

 Harderian gland is of a most unusual form, only a small anterior 

 lobe being mthin the orbit, whilst a large irregularly lobulated 

 posterior portion lies under cover of the poison-gland (PI. XLV. 

 fig. 24). The maxilla has altogether 12 teeth (PI. XLV. fig. 21). 

 The first 11 are solid and of equal size, set very close together, and 

 possess a character which is quite unique amongst the Snakes that 

 I have examined. In transverse section, the anterior face of the 

 tooth is seen to be quite plane, and there are two lateral cutting- 

 edges ; the posterior surface (which is in section about two-thirds 

 of the arc of a circle) is longitudinally ridged (PL XLV. fig. 22). 

 There are eight or nine of these ridges near the base of the tooth, 

 but they run out towards the apex, near to which the tooth 

 becomes almost triangular. The posterior tooth is much larger 

 than the rest and is grooved ; it is somewhat irregular in trans- 

 verse section and the gi-oove is widely open (PL XLV. fig. 23). 



Genus Ceebeeus. 



Species examined : — C, rhynchops. 



The only specimen of this Snake examined had the head 

 considerably damaged, and one maxilla was all that could be 

 isolated in an uninjured condition (PL XLV. fig. 25). It possessed 

 17 teeth, which were in one continuous series, the posterior one 

 being a little larger than the rest and grooved. 



This and the preceding genus belong to the Homalopsince or 

 Freshwater Snakes. 



