22 



BULLETIN 68, UNITED STATES NATIONAL MUSEUM. 



strong sulcus. Base moderately long, well rounded. Entire surface 

 of spire and base marked by fine lines of growth and exceedingly 

 fine, microscopic spiral striations. Aperture oval; outer lip thin, 

 showing the following color marking within; a white zone at the 

 periphery, a narrow chestnut band immediately posterior to the 

 periphery and another at the summit, a broad band extending over 

 half the base immediately below the peripheral zone; deep within, 

 the lip is reenforced by five strong, spiral cords, one at the periphery, 

 two on the base, and two between the periphery and the summit; 

 columella strong, provided with a strong fasciole, posterior fold 

 very strong, lamellar, anterior two very oblique, slender. 



The specimen figured (Cat. no. 11866, U.S.N.M.) comes from La 

 Paz, Mexico. It has lost the nucleus, the twelve remaining whorls 

 measure: Length 11.3 mm., diameter 3.8 mm. 



The following specimens have been examined: 



U. S. N. M. 

 cat. no. 



56764 

 46469 

 109367 

 194465 



105558 

 34171 



11866 

 46468 



No. of 

 speci- 



Localitv. 



From whom 

 received. 



Depth, 

 fath- 

 oms. 



Temp, 

 deg. 



San Diego, California 



do ! Stearns coll. 



do I H. Hemphill. 



Station 2901, off 

 Santa Rosa Island, 

 California. 



Seammon Lagoon , 

 Lower California. 



La Paz, Lower Cali- 

 fornia. 



do 



Gulf of California. . .'. 



U. S. Fish Com. 



II. Hemphill. 



L. Beldlng. 



Steams coll. 



Disposition of 

 material. 



U.S.Nat. Mus. 

 Do. 

 Do. 

 Do. 



Do. 

 Do. 



Do. 

 Do. 



Cat. no. 206854, U.S.N.M., contains a young individual from 

 Monterey, California, which is much smaller and more slender than 

 the typical form, and may prove to be a new species when perfect 

 material shall come to hand. 



PYRAMIDELLA (LONGCH.SUS) BICOLOR Menke. 



Plate 1, fig. 2. 

 Pyramidella hicolor Menke, Malak. Blatt., voL 1, 1854, p. 28. 



Shell elongate-conic, sliining. Early whorls white, the succeed- 

 ing ones gradually acquiring a pinkish tinge, which deepens and 

 finally tints the last whorl rose-purple. (Nuclear whorls decollated.) 

 Post-nuclear whorls overhanging, flattened, slightly shouldered and 

 minutely crenuiated, and deeply sulcate at the periphery. Sutures 

 strongly impressed. Base short, moderately rounded, wath a weak 

 fasciole at the insertion of the columella. Aperture?; (outer Hp 

 badly fractured); columella conic, moderately strong, provided 

 with a strong lamellar fold at its insertion, a moderately strong 

 median one and a weaker anterior to it; the last two much more 

 oblique than the posterior. 



