Descriptions of N'ew Species and New Varieties 233 



umbilicus rapidly increasing in diameter. Aperture ovately rounded, the 

 lip with a heavy internal rim of callus which joins a distinct parietal callus, 

 making the lip in some specimens continuous. Umbilicus varies in depth. 

 Sculpture of fine growth lines, crossed by fine spiral lines, although the 

 latter may be absent in some specimens. 



Shdl Greater Lesser Aperture Aperture 



Height Diameter Diameter Height Diameter 



0.5 0.5* Holotvpe 



0.5 0.5 Paratype 



0.6 0.5 Baker Coll., 2100 



0.8 O.S Baker Coll., 2100 



*A heavy callus redure.s the size (if the aperture. 



Type Locality. Terminal Island, Los Angeles County, California. 



Type Material. Three specimens, collected by Eastman, are in the 

 United States National Museum, Accession no. 19002L Designated holotype 

 and paratypes illustrated on plate 121 as figs. 11 and 9, 10, respectively. 



The type material was labelled as centervillensis. Taken in various 

 southern California localities. Some large individuals of this species were 

 collected from peat deposits by S. S. Berry, in Orange County, California. 

 Two of these individuals, which have a heavy lip callus, are included as 

 the third and fourth items in the above tabulation of shell characters 

 (Baker Coll., no. 2100). 



Menetus labiatus differs from centervillensis in the shape of the um- 

 bilicus and the aperture. 



Men&tus portlandensis, New Species 

 Plate 121, figs. 12-18 



Shell less elevated than in centervillensis, the body whorl depressed, 

 rounded on the periphery, not angled as in centervillensis. Spire flat, three 

 and one-half whorls, sutures impressed. Color blackish to light horn, usu- 

 ally in the same shell. Base flatter than in centervillensis; the umbilicus 

 wider, about one-fourth of the diameter of the shell. Aperture transversely 

 ovate, wider than in c enter vUlensis and not as nearly round. Slight callus 

 on parietal wall. Sculpture of coarsely impressed spiral lines, distinct 

 in all specimens examined. 



Type Locality, Tanner Creek, Portland, Oregon. 



Type Material. A large collection of one hundred shells, collected by 

 J. E. Benedict, is deposited in the United States National Museum, Acces- 

 sion no. 184182. The holotype is shown on plate 121 as fig. 12; six para- 

 types on the same plate as figs. 13 to 18. 



The chief distinguishing characteristics of Menetus portlandensis are 

 that the umbilicus is wider and shallower and the sjiiral lines on the shell 

 are heavier than in other species of the genus. 



This new species has also been taken in the vicinity of San Francisco, 

 California, and at Astoria, Oregon. In the latter instance it was associated 

 with specimens of coopcri. 



