THE NAUTILUS. 59 
in 1822, in the Journ. Acad. Nat. Sci., Phila., ii, p. 317. It re- 
sembles the previous species very closely, but is distinguished from 
it as follows: The shell is much smaller, being only one inch in 
length, half an inch in height, and {in breadth. The valves are 
more convex, thinner and more transparent, the epidermis is pale 
yellowish-brown and the interior purplish-white ; the scalloped edges 
of the epidermis are rounded, while in borealis they have a square 
appearance, very thin at the ends and rolled back. In young speci- 
mens the epidermis is entire (not slit as in the older ones). It is 
not a very common species but is found quite plentifully in March 
and April in Narragansett Bay. They live at and below low water 
in sand and in mud. 
FAMILY CRASSATELLID 2. 
Not represented in North America. 
FAMILY ASTARTIDZ. 
This family is divided into two sub-families, Astartinze and Car- 
ditinze, 
SUB-FAMILY ASTARTINE. 
This family contains fifteen genera, thirteen of which are fossil. 
(To be continued.) 
GENERAL NOTES. 
Mr. W. G. Bryney has in preparation a Third Supplement to the 
Terrestrial mollusks vol. V, in which it is purposed to bring the sub- 
ject up to date, and figure and describe the species discovered since 
the publication of the Second Supplement two years ago. 
Hyarrya Srerkm Dai. A tiny species of Conulus or Hyalina 
discovered by Dr. V. Sterki in Ohio, is described by Dr. Dall in 
Proc. U. S. Nat. Mus. 1889 (separate copy received Aug. 24). It is 
scarcely over a millimeter in diameter, and about a half that height. 
It will be figured in a later number of Tur Nauriuus. 
HeEMPHILLIA AND PropHysaon have both been collected by 
Henry Hemphill at Old Mission, Ceeur d’Alene, Idaho. (W. G. 
Binney, in letter to Ed.) This extends the range of these peculiar 
slugs considerably eastward. In this part of the Northwest Sipe 
other Pacific slope forms extend eastward and mingle with the East 
American types. 
