) 
BBA 
1872. ] : v09 [Chase 
size, varying little to the back of the jaw. The long teeth have sub- 
compressed crowns with opposed cutting edges, and are smooth except 
at their bases. These are distantly sulcate, the separating ridges being 
acute. The smaller teeth are perfect cones and resemble those of Gars 
without their sulci. 
There are more long teeth in the premaxillary bone than below. Pit- 
ting of cranium distinct, elegant. Length of skull about one foot. 
Length of long teeth 1.25 inches ; of small ones .5 inch. 
CROCODILUS SULCIFERUS. _ Cope, sp. Nov. 
A medium sized species with cranium deeply and roughly pitted. The 
chief character is at present visible in the teeth. The larger of these 
are of sub-cylindric and short conic crown, which is superficially grooved 
from basis to near apex ; sulci coarse, open. 
ANOSTIRA RADULINA. Sp. nov. 
Based on two marginal bones one from the front, the other from the 
rear, of the carapace of an animal of twice the bulk of the largest Anostire 
yetfound. Apart from size, the sculpture is peculiar. It consists in the 
anterior of closely packed vermicular ridges which run out flat on the 
posterior and upper edge. In the posterior, it consists of only closely 
placed minute tubercles over the whole surface. 
M. 
Length front one on free edge. ............ 0c cele 0.025 
Width - Sy eee I, Paes -02 
Length posterior on free edge.... 2.32... 02.0050..20.. 025 
Width ay is Ph ee ey -025 
RECENT MONTHLY RAINFALL IN THE UNITED STATES.* 
By Puiny Harte Caasn, 
(Read before the American Philosophical Society, November 1st, 1872.) 
General Myer has kindly favored me with a transcript of the monthly 
reports of rainfall at the several Signal Service Stations, from October: 
1871, to September, 1872, both inclusive. The reports were arranged, at 
my suggestion, in six groups, in order to exhibit the local influence of 
proximity to the great lakes, the gulf, or either ocean, and of situation 
on opposite sides of the Mississippi Valley. In the interpolations (which 
are all enclosed in brackets), for months in which the Bureau received no 
returns, I have usually given more weight to the general rainfall of the 
section than to the local precipitation. The deficient Philadelphia re- 
port, for October, 1871, was supplied from the records at Pennsylvania 
Hospital. 
*Published by permission of Brigadier General Albert J. Myer, Chief Signal Officer, U.S. A, 
