1896.] Zoology. 753 
Lygosoma have the usual tough parchment-like shell, with calcareous 
surface deposits, as in. many Reptilia. They have a structure essen- 
tially similar to that described for the egg-shells of Pityophis. They 
are more slender in form than those of Sceloporus, and measure 9.5 x 
4.5 mm. The contained embryos were somewhat younger than those 
of Sceloporus usually are at the time of disposition—that is, the allan- 
toic outgrowth was but just visible. The fertility of this specimen ren- 
ders it probable that the species is a regular habitue of the neighbor- 
hood, but its small size, and retiring and nocturnal habits, render it 
very likely to escape notice.—J. Percy Moore. 
On a New Glauconia from New Mexico.—Nasal entirely 
divided, rostral rounded behind, reaching the line of the eyes. Two 
labials anterior to the ocular, the posterior reaching the eye. Frontal 
and supraorbital scales smaller than those posterior to them. The eye 
is close to the nasal, and distant from the supraocular. Postocular 
reaching last labial, and bounded posteriorly by three sublingual scales. 
Inferior labials five, the second twice as large as any of the others; the 
fourth barely reaching the commissure of the mouth, and the fifth very 
small. Scales in fourteen rows. A large preanal plate. Tail flattened 
below, entering total length about fifteen times. 
Color very light-brown above, whitish below. Total length 235 mm. ; 
tail 12 mm. 
I found the specimen above described in a road at the silver mines 
at Lake Valley, southern New Mexico. 
The appearance of this species is so similar to that of the G. dulcis 
that I originally identified it with the latter. It is, however, very dif- 
ferent, especially in the number of labials, and the scales which adjoin 
the postocular posteriorly. There is no plate comparable to the so- 
called parietal of G. dulcis. I propose that it be called G. dissecta.— 
E. D. Cope. 
On the Habits of Keen’s Deer Mouse, Peromyscus keeni 
(Rhoads).—The following interesting notes were forwarded me by the 
Rev. J. H. Keen, a missionary on the Queen Charlotte Islands. The 
Deer Mouse referred to was originally described in the Proceedings of 
the Academy of Natural Sciences for 1894, from specimens procured 
by Mr. Keen, and forwarded to Philadelphia. The remarks on the use 
of the cheek pouches for the conveyance of food are of particular value. 
It has been known for many years that several species of this genus 
possessed cheek pouches; but I can remember no personal observation 
of their use by the living animal, having been published.—SaAmuEL N. 
Ruoaps. 
Acad. Nat. Sci., Phila., July 16, 1896. 
