14 ‘REPTILES. 
beneath whitish; shields 172+ 74. Length 23 inches. Inhab. 
Peru. 
Mus. Berlin. 
II. Head more or less shielded. 
a. Subcaudal plates two-rowed ; tail ending in a spine; cheeks not 
scaly ; head-shield with some small additional plates in front. 
Asia. Trigonocephalina. 
7. TRIGONOCEPHALUS. 
Crown with large subnormal shield; dorsal scales keeled. 
Trigonocephalus, Bote, 1827, 561. Fitz. 1826. Wagler, Amph. 
173,1830. Trigalus, Rafin. A. N. 77. Awnat., Schlegel, Nova Act. 
Leopol. N. C. xiv. t. 16, f. 4, 59, and Phys. Serp. 548. 
* End of nose shielded in front. 
+ Head moderate. Halys. 
1. The Hatys. Trigonocephalus Halys, Bote, Isis, 1827, 568. 
Wagler, Amph. 174. Schlegel, P. S. ii. 552, t. 20, f. 4, 5. Gray, 
Zool. Mise. 50. Licht. EHichw. Faun. Casp. 102, t. 19, J: 3 
Coluber Halys, Pallas, Russ. iii. App. 14. Buran Ree: 146. 
Licht. Cat. 106. Col. Aspis? E. W. Gray, MSS. Brit. Mus. 1800, 
fide Shaw. Echidna Aspis, var. Pallasii, Merrem, Tent. 151. 
a, b. In spirits; rather discoloured. Tartary ? 
2. The Wuiter-LippeD Hatys. Trigonocephalus affinis. 
Olive, marbled with brown, with a series of brown spots on the 
lower part of the sides; head moderate, triangular; scales all elon- 
gate, keeled ; temporal streak broad, dark; lips white. 
a. In spirits; not good state. ——————?_ Presented by Capt. Sir 
Edward Belcher. 
3. Biomuorr’s Hatys. Trigonocephalus Blomhoffii, Boie, 
Isis, 1826, 214. Wagler, Amph. 174. Schlegel, Phys. Serp. ii. 552, 
t. 20, f.8,9. Faun. Japon. t. 6. 
Brown, darker varied and spotted ; temple with a broad dark 
streak from the back of the eye. 
a. In spirits. Japan. From the Leyden Museum. 
