Shells small, slender, fusiformis; spire sub-acute, nuclear whorls two, smooth, normal whorls five, slightly sub-angular and ornamented by six large acute radiating ribs with broad concave interspaces; besides these, the whole surface is cancellated by minute raised lines; color brownish white ornamented by a few reddish brown revolving bands, one much larger than the rest, in the middle of the whorl; aperture narrow, columella very slightly twisted; outer lip acute, sinus almost obsolete. Hab. one specimen from Catalina Island, 40 fms., another from the beach at Monterey. Dr. Cooper. No. 425, Mollusca, Survey Cabinet. TURBONILLA, RISSO. _Chemnitzia_, d’Orb. T. GRACILLIMA, G. C. t. elongata, gracili, albida vertice?; anfractibus XI(?) subplanatis; sutura impressa; costis radiantibus, circiter XXIII obtusis, sub-obliquis, ad basin evanidis; apertura sub-rotunda; columella incrassata. Long. ·32?, lat. ·06, long aper. ·04. Shell small, very slender, long, white; vertex broken; whorls eleven or more, flattened on the sides; suture strongly impressed; ribs about twenty-three, large, obtuse, running from the suture to the margin of the base; base convexly subtruncated, smooth; aperture subcircular; columella thick. Hab. Monterey; a single specimen. Dr. Cooper. This shell can be readily distinguished by its extremely slender form and the strong, slightly oblique ribs. CANCELLARIA, Lam. S. Gen. _Narona_, H and A. Ad. C. (N.) COOPERII, G. C. t. subfusiformi; anfractibus II lævibus; anfr. VII sub-angulatis; regione infrasuturali excavata, angulo coronato; regione infra-angulari oblique costata; costis circiter XII; tota superficie concentrice et confertim lirata; colore luteo lineis fuscis regulariter et concentrice lirato; canali elongato; columella vix tortuosa; plicis II; umbilico nullo; labio parum incrassato; labro acuto. Long. 2·4, lat. 1·05, long. aper. 1·25. Broadly subfusiform, nuclear whorls two, smooth, round; normal whorls seven, subangulated, concavely excavated above the angle; angle acutely tuberculated; below the angle the surface is ornamented by about twelve slightly oblique ribs, each rib ending in a tubercle at the upper angle; the whole surface is ornamented, besides these ribs, by small, closely placed, revolving ribs; color yellowish brown crossed by about a dozen brown revolving bands; these bands usually cover the larger of the concentric ribs; canal elongate, columella but slightly twisted; umbilicus obsolete; inner lip but slightly encrusted, bearing two sharp oblique folds; outer lip acute, simple. Hab. One beach specimen, San Diego; another inhabited by a crab, Monterey, 10 fms., and a fragment much larger than the others, Monterey, 16 fms. All collected by Dr. Cooper.