Vol. V] DICKERSON— FAUNA OF THE TYPE TEJON 57 



Neverita weaveri, new species 

 Plate 4, figures 10a, 10b 



Shell small, subglobose with very low spire of three whorls; 

 aperture semilunar, entire ; outer lip thin, curving backward ; 

 umbilicus completely covered in the type, a mature specimen, 

 but partially open in young forms; outer lip and umbilicus in 

 same plane which cuts axis of shell at a forty-five degree angle. 



The umbilicus of this species resembles that of A^. callosa 

 Gabb very closely but its low spire renders it easily separable 

 from N. callosa. 



Dimensions: — Length, 9mm.; width of body-whorl, 11mm. 



Type : — No. 278, and cotype, No. 279, Cal. Acad. Sci. Lo- 

 cality 183, in the west bank of the Cowlitz River about one 

 and three-fourths miles southeast of Vader (Little Falls), 

 Washington, about one-half mile south of Locality 182. 



Named for Professor C. E. Weaver, University of Wash- 

 ington. 



Lunatia cowlitzensis, new species 

 Plate 4, figures 12a, 12b 



Shell of medium size, high with five rounded whorls ; umbil- 

 ical chink small, long, narrow ; callus long, slightly widening 

 above umbilical chink ; aperture semilunar. 



This species has apparently two different forms one of 

 which is slightly higher than the other. Possibly these two 

 forms represent sex differences. 



This species has a higher spire than L. Jiornii Gabb, (See 

 Plate 4. figure 4). It resembles L. shiunardiana Gabb very 

 closely but the callus appears to be slightly different. 



Dimensions: — Length, 30mm. ; width of body-whorl, 21mm. 



Type:— No. 281, and cotype. No. 282, Cal. Acad. Sci. Lo- 

 cality 182, on the west bank of the Cowlitz River immediately 

 south of the eastward bend about one and one-half miles east 

 of Vader, Washington. This is Professor Weaver's Univer- 

 sity of Washington Locality 1. 



Named for its occurrence on the Cowlitz River, Wash- 

 ington. 



