1914] Dickerson : Fauna of the Martinez Eocene of Calif ornia 139 



form, Pugnellus hamulus. Comparing the true Tellina hoffmaniana, 

 i.e., the Chico form obtained from Pence's Ranch, and described in the 

 first volume issued by the State Survey, with Tellina kewi, n. sp., the 

 following differences are noted : ( 1 ) The beaks of T. kewi are situated 

 anteriorly, while those of T. hoffmaniana are central. (2) The length 

 of T. hoffmaniana is proportionally greater than T. kewi. (3) The 

 posterior end of T. kewi is pointed, while that of the other is sub- 

 truncated. (4) The anterior end of T. kewi is far more broadly 

 rounded. Dr. Stanton probably compared his specimens obtained 

 from Lake County with Gabb's second figure, and hence identified it 

 as T. hoffmaniana. 



Dimensions. — Length, 18 mm. ; height. 14 mm. ; convexity, 1 :5 mm. 



Occurrence. — This Tellina is common at University of California 

 localities 784 and 790, near Lower Lake, Lake County, California. 



Named in honor of Mr. Wm. Kevv, University of California, who 

 has ably assisted the writer in collecting. 



PSAMMOBlA('f) CYLINDEICA, n. sp. 

 Plate 12, figures 2a, 2b 



Shell moderately long, thick, convex ; beak located a fifth of dis- 

 tance from anterior end, prosogyrate, approximate ; nymph narrow, 

 cylindrical, elongate ; posterior dorsal margin straight and nearly 

 parallel with the nearly straight ventral margin ; anterior dorsal mar- 

 gin slightly concave under beak, with moderate slope to a narrowly 

 rounded anterior end ; posterior end almost straight. A rounded 

 nmbonal slope extends from the beak to the angle which the posterior 

 end makes with the ventral margin. Shell ornamented by concentric 

 lines of growth. 



Dimensions. — Length, 39 mm. ; height, 18 mm. ; convexity, 8 mm. 



Occurrence. — University of California Locality 780, near Lower 

 Lake village, in the uppermost Martinez. This locality is probably 

 200 feet below the base of the Tejon. It is also found at the very 

 top of the Martinez, at the type locality. 



SP1SULA( ?) WEAVERI, n. sp. Packard 

 Plate 12, figures 4a, 4b 



Shell small, relatively thick, subtrigonal to oval, moderately ven- 

 tricose, evenly rounded ; umbones nearly central, prosogyrate, promi- 

 nent, nearly adjacent ; anterior dorsal margin concave for a distance 



