1916] Moody: Fauna of the Fernando of Los Angeles 



55 



the superior one is the more strongly marked. Suture well defined by 

 a strongly depressed line which is partially covered by a somewhat 

 obscure collar projecting from the whorl below. The interangulation 

 portions of the whorls have parallel walls, and this feature, together 

 with the low pitch of the spire, gives a subquadrate appearance to each 

 whorl. Ornamentation of the body-whorl consists of two very faint 

 revolving ribs above the upper angulation, and three somewhat more 

 pronounced ones below the lower angulation ; transverse sculpture 

 limited to very numerous, fine incremental lines, which are convexly 

 reflexed posteriorly at the upper angulation, forming a broad tur- 

 ritoid embayment at this point. Aperture elongated and somewhat 

 rectangular, with prominent sutural notch at top. Outer lip thin ; 

 inner lip smooth, and lightly incrusted. The canal is deep, short 

 and recurved. 



Dimensions. — Longitude, 13.5 mm. ; latitude, 6.9 mm. 



The short canal and low pitch of the spire serve to distinguish this 

 form from related species. The type specimen presents a very rough, 

 uncouth appearance due in part to erosion, in part to unequal develop- 

 ment of the lines of growth, but largely to attack from parasitic or 

 marauding neighbors. 



One specimen was found in the material available. 



MANGILIA MURICIDEA, n.sp. 

 Plate 1, Figures 10a, 10b 

 Univ. Calif. Coll. Invert. Palaeont., no. 11082. Type locality, Fourth ami 

 Broadway, Los Angeles. 



Shell very small, elongate, fusiform, with an elevated spire. The 

 six convex whorls are ornamented with very coarse, reticulating ribs ; 

 each whorl bears two very strongly marked spiral ribs which produce 

 a faint double angulation; two ribs of lesser weight appear above 

 the central ribs and four below; the interspaces between both major 

 and minor ribs contain small inter-ribs on the body-whorl. The longi- 

 tudinal sculpture consists of fourteen prominent, slightly obliquely 

 directed ribs with quite narrow interspaces. The intersection of the 

 two systems of ornamentation produces a nodose effect. The suture 

 is strongly depressed. The ovate aperture bears an obscure sutural 

 notch; outer lip unknown, inner lip smooth. The canal is long, 

 broadly tapering, and nearly or quite straight. 



Dimensions. — Longitude. 7 mm. ; latitude, 2.9 mm. 



