118 THE NAUTILUS. 
A New Variety oF HELICINA PLICATULA Prr.—ZH. plicatula 
v. christophori. Like plicatula in sculpture, but the umbilical re- 
gion is decidedly concave, excavated around the smaller callus, 
which does not fill it as it does in plicatula. Color uniform dark 
reddish .(like H. occulta Say). This very pretty Helicina was col- 
lected by Dr. Wm. H. Rush, U.S. N., at the island of St. Kitts. 
A large number of specimens were taken. It differs constantly from 
HT, plicatula of Guadelupe in the particulars mentioned. 
H. A. Pilsbry. 
SourH AMERICAN VoLuTID&.—Dr. H. y. Ihering gives a valu- 
able review of the Volutes of this region in the July-August num- 
ber of the Nachrbl. D. M. Gesellschaft. Critical notes on the 
classification may be summed up with the conclusion that the group 
is a very natural one, with transition-forms between the extremes. 
v. Ihering believes V. ferussaci to be a variety of V. brasiliana. 
The tertiary species of Chili are believed to be Cymbiola (Scaphelia) 
forms, and two new species are described from the Eocene St. Cruz 
formation, of which one, V. wmeghinoi, is stated to be certainly the 
ancestor of the recent V. brasiliana. It should be mentioned here 
that the Eocene age of the Santa Cruz beds is doubtful. They are 
more likely Miocene. The Cymbiolas are stated to have arisen from 
Alcithoé-like progenitors, but whether these belong to the Volutoid 
or the Seaphelloid series as defined in Dall’s pioneer study, remains 
undecided. 
CAMPELOMA DECISUM Say, REVERSED.— A series of this species, 
collected by Mr. W. W. Jefferis, of Philadelphia, at Fort Edward 
on the Hudson River, N. Y., has been carefully examined for me 
by Miss Jennie E. Letson for sinistral specimens, with the following 
results: Out of 681 specimens, mainly adult, but including those 
from one-fourth grown, up, none were sinistral. Out of the 410 
shells of the uterine young 3 were sinistral, slightly over 0°73 per 
cent. Probably all who have collected Campelomas have noticed 
the greater proportion of sinistral examples among the young shells. 
This doubtless indicates that the reversed condition is an unfavor- 
able one for maturation. The proportion of sinistral adult shells in 
this locality must be very much smaller, judging by the negative 
result obtained ; but, of course, data are lacking for its determina- 
tion.—H. A. P. 
Hawauan LAnp Motuusks.—Mr. E. R. Sykes has given descrip- 
tions of new species of Macrochlamys, Endodonta and Achatinellide 
in Proc. Malae. Soc., II, pt. 3. The status of the name Microcystis 
