240 CALIFORNIA ACADEMY OF SCIENCES [Proc. 47H Ser. 
Lygosaurus pellopleurus Hallowell 
This lizard must be rather rare on Okinawa, for only four 
specimens were secured there. They were taken between May 
5 and 11, 1910. Three have scales in twenty-six rows, and 
one in twenty-eight. Their scales are strongly carinate, the 
keels varying from three to five in number. The frontal is 
entire in three specimens, divided in one. If one may judge 
from so small a series and the few specimens recorded by 
authors, it seems probable that larger series may establish the 
fact that the frontal is much less frequently divided in the 
Okinawa than in the Amami specimens, and perhaps that the 
scale rows are on the average more numerous in the Okinawa 
form. 
Lygosaurus pellopleurus browni Van Denburgh 
When one compares directly the lizards of Okinawa with 
those of Amami O shima he is at once struck by the much 
stronger keeling of the scales in the specimens from the former 
island. The Amami O shima specimens appear much smoother, 
and, upon examination, many specimens are found in which 
the laterals and the nuchals are without keels, while the 
majority have at most only the two central rows of nuchals 
keeled. Unfortunately we have only four specimens from 
Okinawa, but upon carefully selecting the most strongly 
keeled specimens (Nos. 21386, 21419, 21509 and 21522) from 
a series of more than one hundred and fifty from Amami it 
appears that even these are somewhat less strongly keeled 
than the Okinawa examples. There seems, therefore, to be 
no doubt that the lizards of these two islands should be 
regarded as distinct subspecies. 
Hallowell, in describing Lygosaurus pellopleurus mentioned 
specimens from both islands without indicating either as the 
type locality, but, since nearly all later definite records refer 
to Okinawa, it seems best to restrict Hallowell’s name to the 
lizards of that island and to make Amami O shima the type 
locality of the new subspecies. It is a pleasure to associate 
with this new lizard the name of the late Arthur E. Brown 
of Philadelphia. 
