CLASS GASTROPODA 
169 
Type in United States National Museum, No. 110613. Type locality, 
U.S.S. “Albatross” Station 2919, off Cortez Bank in 984 fathoms. 
Range. Off San Diego, California, to Cortez Banks. 
This was described as Daphnella ( Surculina) cortezi. 
Family MITRIDAE 
Genus MITRA Lamarck, 1799 
Shell fusiform, thick; spire elevated, acute at the apex; aperture small, 
narrow, notched in front; columella obliquely plicate; outer lip thickened, 
smooth internally. 
Type. Mitra episcopalis Lamarck. 
Distribution. Philippines, India, Red Sea, Mediterranean, West 
Africa, Greenland, Japan, Pacific West America. Fossil: Chalk, Cre¬ 
taceous; Pleistocene. 
The following have been placed in the genus Strigatella Swainson Sub¬ 
genus Atrimitra Dali, 1918. 
Mitra catalinae Dali, 1919 
Proceedings of the United States National Museum, 56:303. 
Shell solid, black, fusiform, with about seven whorls exclusive of the 
(lost) nucleus; suture depressed, not deep, the whorls only moderately 
convex and polished; axial sculpture of extremely fine, hardly perceptible 
incremental lines; spiral sculpture of about four, fine, inconspicuous, 
minutely punctate, incised lines, only strong on the very early whorls, 
obsolete on the last whorl, with wide interspaces crossed by almost micro¬ 
scopic spiral striae; aperture narrow, the canal hardly differentiated, the 
enamel very dark, only the plaits whitish, the anterior plait feeble, only 
distinct in the completely adult shell, the other three conspicuous and 
strong. Height of shell, 29; of last whorl, 20; of aperture, 15; diameter, 
11 mm. (Dali.) 
Type in United States National Museum, No. 219643. Type locality, 
San Pedro, California. 
Range. Crescent City to San Diego, California. 
Mitra diegensis Dali, 1919 
Proceedings of the United States National Museum, 56 :309. 
Shell small, blackish-brown, slender, with a whitish nucleus of about 
three whorls and four subsequent whorls; the initial part of the nucleus 
very small and forming a blunt apex, the whole nucleus smooth and chang- 
[1691 
