446 The American Naturalist. [May, 
any, differences are to be noted when the stalk is cut through at differ- 
ent distances from the eye so as to leave intact different portions of the 
optic ganglia.—F. ©. Kenyon. 
Variability of External Sutures in the Skull of Chelone 
mydas L.—In a paper entitled Bemerkungen über die Systematische 
Stellung von Dermochelys Blainb.,” Baur quotes from Boulanger, as 
follows : 
“ The lower border of the post-frontal joins the jugal and the squamo- 
sal, and cantrary to what exists in the Cheloniidx is separated from the 
quadrato-jugal by the two latter bones.” Baur then adds that he finds 
the same relation in two specimens of Chelone mydas L. 
I have before me three skulls of Chelone mydas L. from the Atlantic 
coast, one from an animal weighing about thirty pounds, and two of 
quite precisely the same size from specimens which weighed from sixty 
to seventy pounds. In the first, or small skull, I find the squamoso- 
jugal separation, as well as in one of the larger skulls. In the third 
there is a distinct squamoso-jugal union. Internally the skulls all agree. 
Further differences in these skulls are slight. There is apparently no 
order for the junction right and left of parietals and frontals, and 
frontals and parietals. These, with the squamoso-jugal union or non- 
union should be recognized as altogether variant characters in the 
osteology of Chelone mydas L.—Gro. R. WIELAND. 
Lists of Mammals of Raleigh, N. C.—The following list of 
the mammals found near Raleigh, N. C., is based on twelve years of 
mammal collecting in this vicinity, and observations made since 1880 
on the mammals of this locality by my brother and myself. We 
have preserved some 1,500 or 2,000 specimens as skins, or alcoholics, - 
besides catching in our- trapping a number of others which were not 
preserved. A number of specimens have been bought from the farm 
hands employed in ploughing, or cutting hay, thus adding considerably 
to our knowledge of several species, notably Zapus hudsonius. The 
country lying immediately southeast of Raleigh, where most of the 
collecting was done, is mostly rolling country, except along Walnut 
Creek, where there are considerable tracts of wet meadow and some 
good sized cat-tailswamps. The drier portion of the country collected 
over is about one-half cultivated, and the other half woodland. 
The commoner mammals are distributed as follows: Sciurus caroli- 
nensis and Seiuropterus volans in woods, the third arboreal species, Pero- 
10 Biologische Centralblatt, Dec., 1889, Erlangen. 
