CLASS GASTROPODA 
131 
Type in United States National Museum, No. 214246. Type locality, 
Station 3189, off Cape San Martin, California, in 218 fathoms. 
Range. Known only from type locality. 
Philbertia louisa Dali, 1919 
Proceedings of the United States National Museum, 56:75; PI. 24, fig. 3. 
Shell minute, nucleus with a small apex, the whorls later swollen, the 
second turn with three strong spiral threads, the following three whorls 
with 11 or 12 axial ribs with subequal interspaces and no pronounced 
shoulder; spiral sculpture between the sutures of three strong subequal 
flattish threads somewhat swollen when they override the ribs, and with 
a few much finer threads in the interspaces between the major threads; 
the spaces between the reticulation on the earlier whorls are deep and 
have a pitlike aspect; near the suture in fresh specimens is a dark spiral 
band extending to the rounded shoulder, in front of which the shell is 
yellowish-white with (on the last whorl) four or five narrow, brown, 
spiral lines with much wider interspaces; aperture moderately wide with 
a very shallow ill-defined sulcus, the outer lip thickened, smooth, the 
canal wide, not differentiated from the aperture, the inner lip smooth. 
Height of shell, 4.25; of last whorl, 2.7; diameter, 1.7 mm. (Dali.) 
Type in United States National Museum, No. 160122. Type locality, 
off San Luis Obispo, California. 
Range. Known only from type locality. 
Philbertia capaniola Dali, 1919 
Proceedings of the United States National Museum, 56:304. 
Shell small, strongly sculptured, yellowish-white, elevated, with about 
six whorls, including the smooth minute nucleus of about one whorl; 
suture distinct, rather deep, whorls well-rounded; axial sculpture of (on 
the last whorl 11, omitting the final varix) narrow rounded ribs with a 
slight shoulder, extending to the canal, with wider interspaces, both crossed 
by the spirals but without nodulation; spiral sculpture of (on the spire 
in front of the shoulder about 4) well-defined cords with narrower inter¬ 
spaces, which become more or less obsolete on the last whorl; aperture 
narrow, the anal sulcus shallow and producing no very marked fasciole; 
outer lip infolded, thick, with a varical swelling behind it, simple within; 
body erased, pillar short, straight, canal hardly differentiated. Height of 
shell, 6.5; of last whorl, 4; of aperture, 3.5; diameter, 3 mm. (Dali.) 
Type in United States National Museum, No. 150992a. Type locality, 
off San Diego, California. 
Range. Known only from type locality. 
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