HERPETOLOGY OF JAPAN. 305 



1803. Coluber cerberus Daudin, Hist. Nat. Rept., VII, p. 1G7 (based on Russell, 

 pi. xvii). 



1820. Python elapiformis Merrem, Tent. Syst. Amph., p. 89 (substitute for Elaps 

 boaeformis Schneider). 



1820. Python rhynchops Merrem, Tent. Syst. Amph., p. 90 (emendation). — 

 Cerberus rhynchops Guenther, Rept. Brit. India, 1864, p. 279 (East Ind. 

 archipelago, Ceylon, India, Malay peninsula, Siam). — Boulenger, Cat. 

 Snakes Brit. Mus., Ill, 1896, p. 16 (India, Malay peninsula and archi- 

 pelago, Philippines, Peiew Islands). 



1826. Homalopsis molurus Boie, Isis, 1826, p. 213 (type-locality, Moluccas). 



1837. Homalopsis schneidcri Schlegel, Phys. Serp., I., p. 171 (Pondichery, Bengal, 

 Java, Timor, Amboina, New Guinea); II, p. 341 (schneiderii) . 



1837. Coluber obtusatus Reinwardt, in Schlegel, Phys. Serp., II, p. 341. 



1837. Cerberus russelii Cuvier, in Schlegel, Phys. Serp., II, p. 342, footnote 

 (Pondichery). 



1849. Cerberus acutus Gray, Cat. Snakes Brit. Mus., p. 65 (type-locality, Borneo; 

 type in Brit. Mus.). 



1849. Cerberus unicolor Gray, Cat. Snakes Brit. Mus., p. 65 (type-locality, Philip- 

 pines; type in Brit. Mus.; Cuming, collector). 



Description. — Adult male: Cliristiania University Zoological Museum, 

 No. 830; Formosa; Navara collector, 1894. Rostral pentagonal; the 

 large semidivided nasals broadly in contact with each other behind 

 the rostral; nostrils on upper side of snout; internasals small, trian- 

 gular, separated widely from rostral, in contact with loreal; prefron- 

 tals smaller than nasals, in contact with internasals, loreal, prefrontal, 

 supraocular, and frontal; fi'ontal irregularly divided into four smaller 

 scales; parietals broken up into small scales; supraoculars narrow; 

 loreal lozenge-shaped; one high preocular; two suboculars separating 

 eye from labials; one postocular; temporals 2 + 3, second row keeled; 

 supralabials 10 on one side, 9 on the other, very high and narrow, 

 the last three divided horizontally; 11 inferior labials, 4 in contact 

 with anterior chin-shields; two pairs of chin-sliields, the posterior 

 nearly entirely lateral to the anterior; 25 scale rows, all keeled, 

 except outer row; 145 ventrals; anal double; caudals, 63 pairs. 

 Color (in alcohol) above ash gray with narrow blackish crossbands 

 which do not reach the ventrals, about 25 between head and anus; 

 a narrow blackish band from nostril, tlu-ough eye, obliquely back- 

 ward on the side of the neck; underside, including posterior supra- 

 labials and the tlu^ee or four lower rows of scales wliitish with numer- 

 ous large blackish spots on the sides connected with the correspond- 

 ing spot by irregular dark gray blotches across the ventrals; lower 

 labials with a few small dusky spots. 



Dimensions. 



mm. 



Total length 570 



Snout to vent 447 



Vent to tip of tail 123 



26485— No. 58—07 20 



