184- PROCEEDINGS OF THE CALIFORNIA 



fertim et spiralitur costulata ; colore aurantiaco, lineis rufo-brunneis interruptis in- 

 duta ; apertura angusta ; sinu postico lato, haud profundo. 



Long. 2 - , lat. -7, long. aper. 11. 



Fusiform, spire high, acute, whorls eight, slightly concave near the suture, con- 

 vex below. Surface marked by numerous rounded revolving ribs, sometimes al- 

 ternating 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 yonnger 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. T6. 



Nos. 819 and 1021 Survey Moll. 



CLATHURELLA, Carpenter. 



Defrancia Millet, non Mull. 



C. CONSTRICTA, G. 



C. t. albida, solida, lsevis, sub-fusiformis ; anfr. VII ; regione infra-suturali 

 haud constricta ; apertura lata, labio parum incrassato, labro sub-acuto ; sinu pos- 

 teriore 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 ex- 

 panded 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 lsevibus; anfr. normalibus IV, supra oblique 

 planulatis, infra, eonvexiusculis ; superficie minutis et confertim concentricis cos- 

 tulis instructa, media paite sola excepta, in qua sunt III vel IV costse inonili- 

 formes ; apertura lata ; labio parum incrassato ; labro crasso, margine sub-acu- 

 to ; sinu postico profundo lato ; colore candidissimo, nitente. 



Long. -35, lat. *13, long, aper, *16. 



Shell small, fusiform ; nuclear whorls two, smooth, normal whorls four, oblique- 

 ly truncated above, angulated, below the angle somewhat convex ; surface marked 

 by numerous small revolving ribs, except on the middle of the whorls, where they 

 are larger, more distant and ornamented by small nodes ; aperture rather broad ; 

 inner lip lightly encrusted ; outer lip thickened behind, sub-acute on the margin; 

 posterior sinus moderately deep, round and with a polished and thicked margin, 

 placed close to the suture; canal very Blightly twisted; color, a pure white, 

 polished. 



