NINTH ANNUAL REPORT. 179 
FAMILY COLUBRIDAE.* 
Division I. AGLYPHA. 
Both jaws with solid teeth. 
Subfamilies: Acrochordinae ...The non-venomous River 
Snakes. 
Colubrinae ...... The typical harmless 
snakes. 
Rhachiodontinae .A single genus and species. 
Division Ll: ©OPISTHOGE VRE A: 
A pair, or several pairs, of grooved fangs in the rear of the 
upper jaw.T 
Subfamilies: Homalopsinae ....The poisonous River 
Snakes. 
Dipsadomorphinae A large Subfamily repre- 
sented in both the New 
and the Old Worlds and 
comprising 69 genera. 
Elachistodontinae . A single genus and species. 
Division Ill. PROTEROGLY PHA. 
A pair of short, hollow fangs, in the front of the upper jaw. 
Subfamilies: Hydrophiinae.The Sea Snakes. 
Elapimae..... The Cobras and their allies; 
the Coral Snakes. This Sub- 
family comprises 29 genera. 
Ten species of Cobras are recognized, and they are widely distributed, 
as shown in the following list: 
Egyptian Cobra; Asp; Naja haje. | 
Yellow i “flava. | 
Black-Lipped a “ melanoleuca. | 
Black-Necked  “ “ — nigricollis. \ Africa. 
Yellow-Headed “ anchietae. 
Gold’s : e “— goldit. | 
Guenther’s i. “ guenthert. } 
| India, southern 
King ‘““ Hamadryas; “‘ bungarus. { China and ‘the 
Spectacled a “ tripudians. | Malay Archipel- 
| ago. 
Philippine ‘“ samarensts. Philippine Islands. 
Numerous closely allied serpents inhabit Africa, India, the 
Malay Archipelago and Australia, some of which exhibit a ten- 
dency to expand the neck and raise the body from the ground 
when angry, but with none, with the exception of the African 
genus Sepedon, is the character so markedly developed as among 
the species of Naja. It must be understood, however, that not 
all the species of Naja dilate the neck so widely as does the 
N. tripudians. In some the character is but slightly developed. 
+ Boulenger’s classification 1s followed. 
+The Opisthoglyph snakes might be designated as mildly venomous serpents. 
Their bites are seldom attended by symptoms dangerous to man. 
