NO. 1520. 



NEW VITRINELLID MOLLUSKS—BARTSCH. 



175 



spaced, somewhat wavy, incised spiral lines and fine incremental lines. 

 At more or less regular intervals there appear slight constrictions 

 which coincide with the lines of growth. Peripher}^ of the last whorl 

 well rounded. Base well rounded, very broadly and openh^ umbil- 

 icate to the very apex, marked like the upper surface. Aperture 

 oblique, suboval; outer lip thin; columella short, forming almost a 

 straight line with the faint callus of the parietal wall. The type has a 

 little more than three and a half whorls and measures. Greater diam- 

 eter, 2.3 mm.; lesser diameter, 1.8 mm.: altitude, 0.8 mm. 



The type and another specimen were collected by Mrs. Oldroyd 

 at Long Beach, California, and are entered under Cat. No. 125537. 

 U.S.N.M. 



There are five additional lots in the collection: Cat. No. 192709, one 

 specimen collected l)y Mr. S. S. Berry in 12 fathoms off Del Monte, 

 Monterey, California; Cat. No. 127561 U.S.N.M., three specimens 



Fig. 10.— Cyclostremella californica. a, top view; b, basal view; c, side view. 



from San Pedro, California, collected by Mrs. Oldroyd; Cat. No. 

 192710, U.S.N.M., 25 specimens dredged at Terminal Island by Mrs. 

 W. H. Eshnaur, and 50 additional specimens from the same place are 

 in the collection of Mrs. Plshqaur; Cat. No. 192711, U.S.N.M., three 

 specimens collected by Mrs. Oldroyd at San Diego, California; and 

 lastly Cat. No. 7963, six fossil specimens collected by Mr. Henry 

 Hemphill in the Postpliocene beds of San Diego, California. 



SCISSILABRA, new genus. 



Vitrinella-like shells with the middle of the outer lip deeply and 

 broadly notched, the center of the notch coinciding with the periphery 

 of the shell. 



Type. — Scissilahra dalli. 



