THE NAUTILUS. 11 



parallel sulcation. Otherwise sculptured with revolving lirse 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 N. hrunneostoma is Nassa coinplanata Powis, 

 and these two species, together with X. tegula of Reeve, form a lit- 

 tle group possessing similar general characters. 



N. hrunneostoma 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. 



The Malacological Society of London. — At a meeting held 

 on the 27th February, at 67 Chancery Lane, London, England, 

 W. H. 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 MoUusca and Brachiopoda in all their 

 branches. 



2. That the Society be called the " Malacological Society of 

 London," and that the Annual Subscription be 10s. 6d. 



