GEOLOGY — DESCRIPTION OF FOSSILS. 71 



vex on the back, wider than the intervals, which are transversely striate ; anterior ribs crenate ; 

 ligament margin elevated ; posterior end obtusely rounded ; summits prominent. Length, § 

 inch. — Proceedings Acad. Nat. Sciences, Dec, 1856, p. 314. 

 Locality. — California. — Dr. Newberry. 



AXIJLEA, Poli. PECTUNCULUS, Lain. 



Axincea barbarensis, PI. Ill, fig. 11. Lentiform, subequilateral, concentrically wrinkled ; 

 ribs about 37, scarcely prominent, flat, defined by an impressed line, wanting on the submargins 

 and obsolete towards the base ; summits slightly prominent. 



MULINIA, Gray. 



31. densata, PI. Ill, fig. 12. Subovate, ventricose, thick, very inequilateral ; posterior side 

 very short comparatively, contracted ; extremity subtruncated, much above the line of the base ; 

 posterior basal margin very oblique and contracted ; anterior end obliquely truncated ; anterior 

 basal margin rounded; summits prominent, distant; lateral teeth very robust and prominent; 

 inner margin entire. — Proceedings Acad. Nat. Sciences, Dec, 1856, p. 313. 



Locality. — Santa Barbara and shores of San Pablo bay? California. — Dr. Newberry. 



DOSINIA, Scopoli. 



1. Dosinia longula. Regularly ventricose, inequilateral, longitudinally oval ; margins and 

 base regularly rounded ; summit prominent ; buccal margin more obtusely rounded than the 

 anal. — Proceedings Acad. Nat. Sciences, Dec, 1856, p. 315. 



Locality. — Monterey, Cal. — Dr. Newberry. 



2. Dosinia alta, PI. Ill, figs. 13a and 13b. Obtusely subovate or suboval from beak to base ; 

 posterior margin curved, profoundly oblique ; base regularly and rather acutely rounded ; 

 summits prominent, oblique ; surface marked with numerous fine, concentric, impressed lines ; 

 beaks medial. Height, 4 inches. — Proceedings Acad. Nat. Sciences, Dec, 1856, p. 315. 



Locality. — Monterey, Cal. — Dr. Newberry. 



PECTEN, Lin. 



Pecten Pabloensis, PI. Ill, fig. 14. Orbicular, compressed, thin, concentrically wrinkled ; 

 ribs 18-20, slender ; little prominent, with an intermediate radiating line. 

 Locality. — San Pablo bay, Cal. — Dr. Newberry. 



PALLIUM, Klein. 



P. eslrellanum, PL III, fig. 15. Suborbicular ; lower valve ventricose, slightly undulated ; 

 ribs 17, broad, little prominent, convex, with an intermediate linear rib, from which the larger 

 ribs are separated by an impressed line ; upper valve convex, somewhat undulated, ribs flattened, 

 and the intermediate small ribs with a longitudinal impressed line on the lower part of the 

 valve. — Proceedings Acad. Nat. Sciences, Dec, 1856, p. 313. 



Locality. — Estrella valley, Cal.— Dr. Newberry. 



JANIRA, Shunt. 



Janira bella, PI. Ill, fig. 16. Subtriangular ; inferior valve convex, ribs 14 or 15, square, 

 about as wide as the intervening spaces, very prominent, some of them with one or two longi- 

 tudinal obsolete lines ; disk finely wrinkled concentrically ; upper valve flattened, deeply 



