A. E. Verrill—Recent additions, etc. 281 
The computed result is, rigorously, 852°25 miles of height 
above the earth’s surface. e distances of the point observed 
from the two stations were respectively 720°08 miles and 600°31 
miles. This ascertained height, like the same found for the 
similar zone of 1870 (839 miles), is, no doubt, extraordinary ; 
nits considering the novelty of these zones in other particulars, 
' : 
# 
Art. XX XVIII.—Brief Contributions to Zoiilogy from the Mu- 
seum of Yale College. No. XX.—FHecent Additions to the 
Molluscan Fauna of New England and the adjacent waters, 
with notes on other species ; by A. EK. VERRILL. 
[Continued from page 209.] 
es ). 
Loligo = Ommastrephes Bartramii Binney (non Les. sp.). The 
figure (pl. xxv, fig. 339), represents a Loligo, but does not show 
Descriptions of Genera and Species. 
Scalaria angulata Say, Amer, Conch., 1831, = Humphreyst: 
Kiener, 1838. 
Say described this species as a doubtful variety of S. elutheus, 
under the above name, which should, therefore, be adopted 
instead of Kiener’s, 
Acirsa borealis Mérch (Beck sp.). 
Shell white or pale flesh-color, elongated, turreted, acute. 
orls ten, convex, with numerous revolving striz ; the upper 
* This Journal, I, vol. xxxii, page 217. 
