128 THE NAUTILUS. 



the varices nearly vertical to the surface of the whorl, instead of 

 reflected, which makes them appear sparser, though really the same 

 number occur on the whorl ; the varices are narrower and the peris- 

 tome less heavy and wide. Long. 3.25, max. diam. 1.6 mm. 



Dredged in twelve fathoms mud, Monterey Bay, S. S. Berry. 

 U. S. Nat. Mus. 110,430. 



The specimens seen are of a more yellowish-creamy-white than 

 S. berryi which has a bluish subtranslucent appearance. » 



Scala (Cirostrema) montereyensis n. sp. 



Shell small (probably not full grown), the nucleus lost but with 

 five subsequent rapidly increasing whorls ; shell substance in two 

 layers, the inner translucent white, solid, the outer opaque white, 

 frothy, porous, with numerous puncticulations arranged in harmony 

 with the incremental lines, except on the basal disk where they form 

 spiral lines ; varices low, solid, with a spongy surface, nine in num- 

 ber ; basal disk conspicuous, slightly concave ; bordered by a con- 

 spicuous cord ; aperture gibbous, patulous near the imperforate axis. 

 Long. 2.5, diam. 1.5 mm. 



Dredged in 25 fathoms mud, off Del Monte, in Monterey Bay, 

 Cala., by S. S. Berry. U. S. N. Mus. 110431. 



This shell represented by two specimens, of which one is in Mr. 

 Berry's collection, is doubtless immature, but there is no other species 

 known north of Cape St. Lucas belonging to this special group, and, 

 though the characters require rather high magnification to see them 

 clearly, it cannot be confounded with any other Californian species. 



NOTE ON THE GENUS PSILOCOCHLIS DALL. 



BY WILLIAM H. DALL. 



This curious Turbinella, collected by Mr. McCallie in the Eocene 

 of Georgia, was described in The Nautilus for May, 1904, p. 9. 

 Additional material shows that the mature shell is covered with a 

 coating of enamel which extends to the very apex of the spire, ob- 

 scuring the sutures, a feature not hitherto reported in connection 

 with the genus Turbinella or any of its close allies ; so that Psilo' 

 cochlis described as a subgenus, seems fully entitled to generic rank. 

 Only the typical species, P. mccalliei Dall, is at present known. 



