Dr. J. E. Gray on the Uropeltidse. 



377 



II. The tail subtruncate ; end convex, rounded, covered with a 

 single horny tubercular shield. 



3. Mytilta. Caudal shield many-keeled ; nose more or less 

 acute. 



1. Siloboura Elliott. 



2. Mytilia Templetonii. 



3. Plectrurus Perrotetii. 



4. Mytilia unimaculata. 



5. Mytilia melanogaster. 



III. Tail oblong, compressed, covered with separate 3-keeled scales ; 

 tip covered with a small compressed cap-like spinose shield. 



I. Tail cylindrical, obliquely truncated, with a fiat superior disk. 

 Uropeltina. 



1. Siloboura, Gray. 



Tail obliquely truncated ; disk oblong, covered with rhombic, two- 

 or four-keeled scales, the scales on the lower edge of the disk larger, 

 tubercular above, and having two acute tubercles on its sharp lower 

 edge. 



* Scales of caudal disk four-keeled. 



1. Siloboura Ellioti (fig. 1). 



Siloboura ceylonica, Gray, Cat. Brit. Mus. 142 (notCuvier). 



Caudal disk oblong, elongate ; scales of the disk four-keeled ; brown, 

 with a narrow yellow streak on each side of the neck, a broad yellow 



