P. (S.) CARPENTERIANA, G. P. t. fusiformis; anfractibus VIII, prope suturam concavis; tota superficie confertim et spiralitur costulata; colore aurantiaco, lineis rufo-brunneis interruptis induta; apertura angusta; sinu postico lato, haud profundo. Long. 2·, lat. ·7, long. aper. 1·1. Fusiform, spire high, acute, whorls eight, slightly concave near the suture, convex below. Surface marked by numerous rounded revolving ribs, sometimes alternating in size, especially on the lower part of the body whorl. Color, orange with broken revolving bands of a bright reddish brown; these lines or bands usually occupy the larger ribs, and are more distant on the middle of the whorl and more closely placed above and below; they average about a tenth of an inch apart. Aperture narrow, growing proportionally broader in older shells; canal moderate, slightly twisted, inner lip lightly encrusted; outer lip acute, sinus broad and shallow. Hab. A beach specimen retaining color, from San Diego, and a younger dead shell dredged from 120 fms. by Dr. Cooper. Also, two fossil specimens from P. Pliocene, Santa Barbara. The finest of these measures long. 3·, lat. 1·1; long. spir. 1·6. Nos. 819 and 1021 Survey Moll. CLATHURELLA, Carpenter. _Defrancia_ Millet, non Müll. C. CONSTRICTA, G. C. t. albida, solida, lævis, sub-fusiformis; anfr. VII; regione infra-suturali haud constricta; apertura lata, labio parum incrassato, labro sub-acuto; sinu posteriore profundo, suturam attingente. Shell white, solid, smooth, sub-fusiform; whorls seven, suddenly constricted at the upper portion, near the suture; suture impressed; body whorls rapidly expanded below the constriction; aperture wide, columellar lip encrusted; canal short; outer lip acute, prominent in the middle; posterior sinus deep, angular above and adjoining the suture. Hab. Santa Catalina Island, 80 fms. Dr. Cooper. No. 1055 Mollusca, Survey Cabinet. C. CRYSTALLINA, G. C. t. parva, fusiformis; anfr. II lævibus; anfr. normalibus IV, supra oblique planulatis, infra, convexiusculis; superficie minutis et confertim concentricis costulis instructa, media parte sola excepta, in qua sunt III vel IV costæ moniliformes; apertura lata; labio parum incrassato; labro crasso, margine sub-acuto; sinu postico profundo lato; colore candidissimo, nitente. Long. ·35, lat. ·13, long. aper. ·16.