430 SMITHSONIAN MISCELLANEOUS COLLECTIONS [vol,. 50 



Type.— Cat. No. 165,324, U. S. N. M. 



Locality. — San Julian ranch, 10 miles southeast of Lompoc, Santa 

 Barbara County, California ; locality No. 4504. 

 Horizon. — Vaqueros formation, lower Miocene. 



New Pliocene (Fernando Formation) Species and Varieties 



LYMN^A ALAMOSENSIS, new species 

 PL LIV, figs. 6 and 7 



Description. — Adult shell averaging about 6 or 7 millimeters in 

 altitude, broadly spindle-shaped, spire elevated, apex rounded. 

 Whorls four, bulging, more convex posteriorly than anteriorly; out- 

 line of body whorl regularly arcuate ; a faint ridge crowns the pos- 

 terior margin of each whorl where it appresses against the ante- 

 cedent whorl. Suture appressed, slightly sinuous, distinct ; sculpture 

 consisting of numerous microscopic incremental lines, which are 

 somewhat better developed on the posterior portion of the whorl, 

 and occasional faint spiral striae ; a hard, glossy epidermis is pre- 

 served on some of the specimens. Aperture sub-oval, narrowing 

 posteriorly ; outer lip protruding anteriorly, thickened into over- 

 hanging flange internally, and flaring from posterior extremity as 

 far around as umbilical region ; a minute umbilical chink is visible in 

 most specimens. 



Dimensions. — Altitude, 6 mm. ; latitude, 3 mm. ; altitude of body 

 whorl, 4.9 mm. ; longitude of aperture, 3 mm. ; latitude of aperture, 

 1.5 mm. 



Notes. — This unique little fossil occurs in a peculiar fine-grained 

 gray clay in the upper portion of the Fernando formation, where, 

 at the type locality, near Los Alamos, it is quite abundant. No 

 other fresh-water species were found associated with it. 



Type.— Cat. No. 165,426, U. S. N. M. 



Locality. — Fresh-water beds one mile southeast of bench-mark 

 425, Los Alamos Valley, Santa Barbara County, California; locality 

 No. 4483. 



Horizon. — Fernando formation, fresh-water portion at top, 

 which probably corresponds with the Paso Robles formation of the 

 San Luis quadrangle described by Fairbanks in the San Luis folio. 



DRILLIA GRACIOSANA, new species 



PI. LIV, fig. 18 



Description.- — Shell averaging about 14 or 15 millimeters in alti- 

 tude, spindle-shaped ; the sharper portion of the spindle being above ; 



