THE NAUTILUS. dla 
parallel suleation. Otherwise sculptured with revolving lire on the 
lower half of the basal whorl. Suture more or less distinct, aper- 
ture small, ovate, about one-third the length of the shell. Outer lip 
externally rimmed and internally thickened, crenulated and dentic- 
ulate on the inner side; pillar and face of basal whorl heavily cal- 
loused, with a single plication or fold on the base and four or five 
obtuse wrinkles above. Aperture notched above with the usual 
attendant callosity; pillar roundly arcuated, and the whole sur- 
face of the parietal region and edge of the lip showing a warm 
shining brown glaze, light in some examples and quite dark in 
others; some specimens are much more robust than others and 
vary also in the elevation of the spire. 
Dimensions of largest, altitude 16 mm., breadth 9 mm. 
An intermediate example measures, altitude 15 mm., breadth 8 
mm. 
The majority of the specimens are much smaller than the least of 
the above. 
The nearest ally of NV. brunneostoma is Nassa complanata Powis, 
and these two species, together with V. tegula of Reeve, form a lit- 
tle group possessing similar general characters. 
NV. brunneostoma is readily separated from its congeners by the 
highly glazed and solid brown callus that surrounds the aperture. 
Habitat—Gulf of California, near the mouth of the Colorado 
River; also at Guaymas, on the easterly shore, where numerous 
examples were collected by Dr. Edward Palmer (Mus. Nos. 23721, 
37239, 55951). 
Washington, D. C., May 2, 1893. 
NOTES AND NEWS. 
Tort MaracotoaicaL Society or Lonpon.—At a meeting held 
on the 27th February, at 67 Chancery Lane, London, England, 
W. Hz. Hudleston, F. R.S., in the chair, the following resolutions 
were passed : 
1. That a Society be formed in London for the purpose of fur- 
thering the study of the Mollusca and Brachiopoda in all their 
branches. 
2. That the Society be called the “ MaLacoLocicaL SOCIETY OF 
Lonpovy,” and that the Annual Subscription be 10s. 6d. 
