CLASS GASTROPODA 
177 
smaller lines between, which are continuous to the base of the shell. 
Aperture semicircular; canal oblique and somewhat elongated; from the 
posterior edge of the aperture to the anterior end of the canal, is little 
more than half the length of the shell; outer lip thin; columella smooth. 
Length, 1.4; breadth, .6 in. (Trask.) 
Type in California Academy of Sciences. Type locality, San Pedro. 
Range. San Pedro to San Diego, California. Fossil: Pleistocene, 
Santa Barbara and San Pedro. 
This is Trask’s description of his Fusiis rugosns. 
Described from a fossil. 
SECTION HEILPRINIA Grabau, 1904 
Fusinus barbarensis Trask, 1855 
Proceedings of the California Academy of Sciences, 1: 41. Arnold, Paleontology of 
San Pedro, California; PI. 4, fig. 15. 
Shell fusiform; rather thin; about seven convex whorls; turreted; 
the last whorls have about twelve rounded folds becoming obsolete near 
the middle of the last whorl; eight or nine wavy transverse threads tra¬ 
verse the lower whorl, becoming less defined from the middle forward; 
folds interrupted at the sutures; apex subacute. Aperture semicircular; 
canal slightly oblique; external lip rather sharp and thin; indistinct striae 
within, columella smooth. Length, .9; breadth, .4 in. (Trask.) 
Type in California Academy of Sciences. Type locality, Santa Bar¬ 
bara, California. 
Range. Heceta Bank, Oregon, to San Diego, California. Fossil: 
Pleistocene, Santa Barbara, San Pedro. Pliocene, San Pedro. 
Described from a fossil. 
Fusinus robustus Trask, 1856 
See Part II, Plate 3, fig. 6 
Nautilus, 29: 55. 
Shell fusiform, turreted thick; about seven convex whorls; eight vari- 
cosed, distinct folds on the last whorls, which are interrupted at the 
sutures; about five revolving lines on the upper whorls, and twelve on the 
last; folds become obsolete a little anterior to the middle of the body 
whorl; greatest breadth across the posterior portion of the aperture. Aper¬ 
ture obovate; outer lip thick; canal straight; distance from the posterior 
edge of the aperture to the end of the canal, equal to half the length of the 
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