320 



MR. S. C. SARKAR ON THE BUCCAL GLANDS 



3. Tropidonotus stolatus. 

 A greater portion of tlie gland in the region of the maxilla is differentiated to form 

 the parotid or poison gland (p.ff.). The hinder tooth (_/) is much bigger 

 than those in front. The cutting-edge (c.e.) is more marked. It is also 

 enclosed within a special sac (f.s.). The duct of parotid glands {duct p.g.) 

 enlarges at the end to form a cavity (ves.) which becomes confluent with 

 the tooth sac before opening into the mouth. Sac is kept filled with the 

 secretion and the tooth dipped into it. 



c/uct.p.y. 

 cfuct.s.l.^. 



4. Tiycodon aulicus. 

 The parotid gland is much enlarged, and almost extends up to f of maxilla. 



The 



duct {duct p-ff-) is similar to Tropidonottis, except that it opens a little 

 higher. The tooth is like a lancet, with a cutting-edge on each side. 



Text-figure 26. 



cfuct.s.ig. 



duct.s.l.£. 



5. OxijheJisftdgida. 



The poison gland ip-g.) well developed. The arrangement of the duct is similar to 

 that of Lycodon and Tropidonotus, i. e. enlarges to form vestibule {ves) 

 before opening into the mouth (Aglyphous condition). The fang {f) is 

 laterally compressed. Has almost lost cutting-edges, but has acquired a very 

 shallow groove like Opisthoglypha. 



