50 
Zoological Miscellany. 
lower series of brown and an upper of white spots, forming together a broad 
band : beneath paler green, chin whitish green. 
Inhabits the Philippine Islands, Mr. Cuming. Brit. Mas. 
5. MegcBm variegata. Green (in spirits) ; head black varied ; back with 
rather narrow black cross bands ; sides with an interrupted series of indis- 
tinct yellow spots ; beneath rather paler : tail yellow, black-banded, com- 
pressed. 
Inhabits the Philippine Islands. Brit. Mus. 
b. End of tail with 4 rows of scales beneath. Lachesina. 
V. Lachesis. Head ovate, crown scaly. 
1. Lachesis muta^ Daud. L. rhombeata, Neuw. Abbild. t. Bothrops 
Surucua, Wagler. Crotalus mutus, Linn. Seba, ii. t. 76, fig. 1, t. 91 & 92. 
Schlegel, 570, t. 20, fig. 19, 20. Boa muta, Lacep. Scytale catenatus and 
S. Ammodytes, Latr. Boa crotalina, Shaw. Col. AlectOy Shaw. Trigo- 
nocephalus rhombifer, Cuv. Cophias crotalinus, Merrem. 
Inhabits South America. Brit. Mus. 
II. Head more or less shielded., cheeks nob scaly P 
a. Subcaudal plates two~rowed : tail ending in a spine : head-shield with 
some small additional plates in front. Trigonocephalina. 
VI. Trigonocephalus, Wagler. Dorsal scales keeled. 
1. Trigonocephalus Halys, Boie. Coluber Halys, Pallas. Col. Aspis, 
E. W. Gray, MSS. Brit. Mus. Echidna Aspis var. Pallasii, Merrem. 
Inhabits Tartary ? Brit. Mus. 
2. Trigonocephalus Blomhoffii, Boie, MS. 1826, 214 ; Fauna Japon. 
Ophid. t. 6 ; Schlegel, 552, t. 20, fig. 8, 9. 
Inhabits Japan. Mus. Leyden. 
Boie and Wagler refer, 1. Trigon. Hypnale, Schlegel, 550, t. 20, fig. 6, 7; 
Cophias Hypnale, Merrem ; Russell, ii. t. 22 ; 2. Trigonocephalus Rhodos- 
toma, Reinw. ; Schlegel, 547, t. 20, fig. 1 — 3 ; 3. Trig, pretextatus, Hempr. 
Seba, ii. t. 68, fig. 6; Vipera pretextata, Gravenh.; Russell, Ind. Serp. ii. 
t. 21 ; to this genus. 
Coluber No. 21, Russell, Ind. Serp. ii. t. 21, from Java, appears to form 
a new genus allied to this, but I have never seen a specimen. 
b. Subcaudal plates one-roived : tail ending in a spine : head shielded. 
Cenchrina. 
VII. Cenchris, Daud. Angkistrodon, Beauv. Tisiphone, Fitz. 
1. Cenchris contortrix. C. Mokeson, Daud. t. 70, fig. 3, 4 ; t. 60, 
fig. 25. Coluber Tisiphone, Shaw. Cenchris marmorata, Boie. Pelias niger, 
Merrem. Col. Cacodcemon, Shaw. Col. constrictor, Linn. Boa contortrix, 
Linn. Trigonocephalus Cenchris, Schlegel, 553, t. 20, fig. 10, 11. Black 
and brown Viper, Catesby, Carol, t. 44, fig. 5. Tisiphone cuprea, Fitz. 
Trigonocephalus contortrix, Holbrook, N. Amer. Erpet. t. 14. Heterodon 
contortrix, Cuv. 
Inhabits North America. Brit. Mus. 
