— 8 — 



from Korisho, Nansho, Jukirin, Horisha, Urai, and Taihoku. Confined to 

 Formosa. 



19. Trimeresurus elegans (Gray). 



Plate XII, fig. 1-5. 



1849. Craspedocephalus elgens (Gray), Cat. Sn. Brit. Mus., p. 7 (" West coast 

 of (North?) America," probably Ishigakijima). 



One specimen from Loo Choo. 



20. Trimeresurus flavoviridis (Hallo well). 



Plate XIII. 



i860. Bothrops flavoviridis Hallowell, Proc. Philad. Acad. Sci., 1860, p. 492 

 (Keramashima). 



/\ 



Six specimens from Amami-Oshima ; six from Okinawa-shima. 



21. Trimeresusus okinavensis Boulenger. 



Plate XIV. 



1892. Trimeresurus okinavensis Boulenger, Ann. Mag. Nat. Hist., (6), X, p. 302 

 (Okinawa). 



/». 



Two specimens from Amami-Oshima ; four from Okinawa-shima. 

 22. Trimeresurus monticola Gnenther. 



Plate XV. 



1864. Trimeresurus monticola Guenther, Bept. Brit. India, p. 388, (Nepal and 

 Sikkim). 



Snout very short ; upper head shields smooth and subimbricate. Rostral 

 broader than high barely visible from above ; internasal hexagonal, in con- 

 tact with each other ; three scales including internasal covering the canthus 

 rostralis ; supraoculars broad, about one-third as wide as interocular space ; 

 8 scales in a line between supraoculars ; nostril pierced just behind the 

 middle of undivided nasal, which is not turned over to the canthus rostralis ; 

 nasal broadly in contact with the internasal and rostral ; one squarish loreal 

 on a line with preoculars ; two long preoculars, of which the lower slightly 

 longer than the upper and half as high as the latter, forming the upper edge 

 of the pit : subfoeveal crescentic, short, separated from the eye by a small 



