454 CHARLES H. DAVIS 
The tellina here described was found among fossils characteristic 
of the Lower Temblor on the northern headwaters of San Antonio 
Creek, Monterey County. 
SPECIES LISTED AND NAMED FROM SLATE’S SPRINGS 
Pleuromya (?) undulata (n. sp.), L.S.J.U. Fic. 4. 
Grammatodon inornatus Meek and Hayden. 
Yoldia arata Whiteaves. 
Nucula (acila) sp. 
Inoceramus lucianus (n. sp.), L.S.J.U. Fic. 2. 
Alaria fairbanksi (n. sp.), U. of C. Fic. 1. 
Sequoia fairbanksi Fontaine. 
FROM NEAR PORT HARFORD, SAN LUIS OBISPO COUNTY, 
CALIFORNIA 
Pecten (Camptonectes) harfordus (n. sp.), L.S.J.U. Fics. 3, 5, 6. 
FROM UPPER SAN ANTONIO CREEK, MONTEREY COUNTY, 
CALIFORNIA 
Tellina tenuistriata (n. sp.), L.S.J.U. Fic. 7. 
DESCRIPTION OF SPECIES 
Pleuromya (?) undulata (n. sp.). Fic. 4. 
The specimens in the L.S.J.U. collection closely resemble Pleuromya (?) 
carlottensis Whiteaves,! but are somewhat larger. The specimen from Slate’s 
Springs is strongly marked by broad concentric grooves, a characteristic not 
marked in the P. concentrica Whitfield and Hovey.2. The right valve is dis- 
tinctly convex in front and along the sides, becoming slightly concave at the 
posterior margin; outline ovate, short and rounded in front, produced and 
blunt posteriorly. The beaks are situated a distance of about one-fourth 
from the anterior end, apices wide but not acute. The hinge-line behind the 
umbones is almost straight, curving slightly upward at the posterior end; 
ventral margin broadly rounded. The surface is strongly and concentrically 
ribbed—the ribs separated by deep concave grooves. 
Dimensions: Length, 34 inches; height, 2 inches; thickness of closed 
valves, 13 inches. 
(2?) Grammatodon inornatus Meek and Hayden. 
One nearly perfect specimen of a left valve, several specimens showing 
middle and anterior end. The characters and dimensions agree with the 
description of G. inornatus by Whitfield.s 
t Geol. Surv. Canada, Mesozoic Fossils, 1, Pt. I (1896). 
2Am. Mus. Nat. Hist., XXII (1906), 389-402. 
3 Geol. Black Hills of Dakota (1880), p. 359, Pl. 5, Figs. 16-18. 
