206 
MARINE SHELLS OF WEST COAST OF NORTH AMERICA 
Length of shell, 34; of last whorl, 18.5; of aperture, 14.5; max. diam., 
8 mm. (Dali.) 
Type in United States National Museum, No. 110631. Type locality, 
off San Diego, in 124-359 fathoms. 
Range. Bodega Head to San Diego, California. Fossil: Pleistocene of 
San Pedro. 
Exilia rectirostris Carpenter, 1865 
Plate 6, fig. 7; Plate 28, fig. 2 
Proceedings, Philadelphia Academy of Natural Sciences, 64. Proceedings of the 
United States National Museum, 21; PI. 34, fig. 2. 
?Chr. t. parva albida, cameo maculata, gracili epidermide tenui, cornea 
in duta; anfr. nucleosis? . . . (decollatis;) anfr. normalibus vi. planatis, 
suturis parum distinctis; adolescente, costulisradiantibus circiter xiv. 
latis baud expressis, adulta obsoletis; lincis spiralibus haud conspicuis; 
apertura elongato-pyriformi, in canalem valde productum, apertum, rectum^ 
subito attenuata; labro acuto, parum arcuato, haud sinuato; labio incon- 
spicuo. Long., .88; long, spin, .43; lat., .32. (Carpenter.) 
The shell is white, with a polished olive-brown periostracum and a 
tinge of reddish-brown within the aperture. It is frequently eroded, 
especially near the apex, and the long slender canal is frequently distorted 
by fracture and repair. (Dali.) 
Type in United States National Museum, No. 4815. Type locality, 
Puget Sound. 
Range. Behm Canal, Alaska, to Cape San Quentin, Lower California. 
Genus PLICIFUSUS Dali, 1902 
Shell strongly plicate axially, smooth or spirally sculptured, usually 
with an inconspicuous periostracum; nucleus Chrysodomoid; aperture 
ample, the outer lip markedly flexuous behind, slightly expanded, simple, 
sharp; the pillar callous, the canal slightly twisted and recurved, moderately 
long; operculum as in Colti-s . (Dali, 1918.) 
Type. Fusns kroyeri Moller, 1842. 
Distribution. Arctic Seas. 
Plicifusus kroyeri Moller, 1842 
Index Molluscorum Grbnlandiae, 15. Tryon, Manual of Conchology, 3; PI. 53, fig. 335. 
Testa fusiformi, tereti, rufofusca; anfr. convesis, inferne lineis 
undulatie impressis longitudinalibus cinctis; spira elongata, exserta, cos- 
tulato-rugosa. Long., 25'" (Rs. Moller.) 
[206 ] 
