NO. 1545. NEW FOSSIL MOLLVf^KS FROM CALIFORNIA— ARNOLD. 535 



CARDIUM QUADRIGENARIUM Conrad var. FERNANDOENSIS, 



new variety. 



Plate XLVIII, lign. 2 and 2ii. 



Descrlpiton. — Shell smaller than the typical form, oval, ventricose: 

 umbones central, prominent, turned only slightly anterioril}- surface 

 sculptured with about thirty-six prominent, subangular radiating- 

 ridges roughened over the anterior and posterior portions of the 

 shell l)y prominent pointed tubercles on the posterior angle; those 

 ridges near the posterior margin are less prominent, but are nodose 

 for nearly their whole length. 



Dimensions. — Altitude, 55 mm.; longitude, 58 nun.; diameter (l)oth 

 valves), 38 mm. 



Notts. — This variety is more ol)lique, has narrower umbones, is 

 relatively less in diameter, and has fewer and less prominently spinose 

 ri})s than the typical form. The typical form has over forty ribs, 

 Avhile var. fernandoensis has but thirt3'-six. Named after the Fer- 

 nando formation of which it is supposed to be characteristic. 



Type.—Q^i. No. 1»M94T, U.S.N.M. 



Locality. — Elsmere Can3'on, near Pacific Coast Oil Company's well, 

 2^ miles southeast of Newhall, Los Angeles County, California. 

 (Ralph Arnold.) 



IIoTizon. — Middle Fernando formation (lower Pliocene). 



CANCELLARIA FERNANDOENSIS, new species. 

 Plate L, fig. 4. 



Description. — Shell about 20 to 24 mm. in altitude; broadlv fusi- 

 form; spire elevated; whorls four or five, sharply angulated at about 

 two-thirds height of whorl; flat or slightly convex both above and 

 below the angle; whorls crossed l)y numerous (18 on body whorl) 

 broad longitudinal varices which extend from suture to suture, being- 

 fainter above than below; surface also ornamented by equal equidis- 

 tant raised spiral lines, about three or four below the angle, two or 

 three above. Suture appressed, distinct^ Lower portion of type 

 broken. 



Dimensions. — Altitude (restored), about 20 mm.; latitude, 13 mm. 



Notes. — This species is closely allied to the tropical species C. Can- 

 dida Sowerby, but is distinguishable l)y its broader form, much 

 broader varices, and more evenly spaced spiral lines. Named for the 

 Fernando formation, of which it is supposed to be characteristic. 



%;6.— Cat. No. 164956, U.S.N.M. 



Locality. — Elsmere Can3^on, near Pacific Coast Oil Company's wells, 

 2i miles southeast of Newhall, Los Angeles County, California. 

 (Ralph Arnold.) 



Horizon. — Middle Fernando formation (lower Pliocene). 



