480 The American Naturalist. 
It will be observed that all of the families include burrowing typ 
and that the Colubride and Xenodontide include also arboreal type 
This result is in accordance with the general rule that adaptations 
present environment are not indications of the deepest affinities. 
the families include glyphodont genera. The genera included in 
families are the following : | 
CALAMARIIDÆ. 
maria gervaisii the plice are well developed. 
formerly referred to Simotes belong here. In Holarchus* (( 
ancorus, the sulcus is undivided, and the distal part of the exi 
side is membranous. In the H. trinotatus the sulcus and hemip 
. shortly bifurcate, for which reason I refer it to a distant genus 
the name of Dicraulax. Ihave had access to very few types of 
group, and consider the present arrangement provisional. 
LYCODONTID&. 
I. Aglyphodont; sulcus spermaticus undivided. 
No palatine or pterygoid teeth. (In Ovigodon subguadratus the only 
the genus examined, there are two robust papilla on the extremity of the he 
ni 
Hemipenis simple; palatine and pterygoid teeth ; Lye 
II. Aglyphodont ; sulcus spermaticus, and generally hemipenis, a, 
III. Glyphodont ; sulcus and hemipenis bifurcate ; 
IV. Glyphodont; sulcus simple; 
To the Lycodontine belong Lycodon and Anoplophallus (= 
ops Hallow.) which has a long loreal and no preocular gene ; 
spines on the hemipenis. To the Boddontine belong Boddo 
COLUBRID. 
The subfamilies are as follows: 
gaer S. Natl. Museum, 82, 1887, p. 54. 
