456 CHARLES H. DAVIS 
other specimens show broad unequal concentric folds, often deep, as in the 
case of I. elliotii Gabb. 
Height, 43 inches, is slightly greater than the length, 32 inches. This 
inoceramus is not of the catillus type. 
This species resembles J. vancouverensis 
in general size and outline, and in the 
direction of the hinge-line. 
Alaria fairbanksi (n. sp.), Fic. 1. 
A single imperfect specimen is in the 
paleontological collection of the University 
of California, and was collected by Dr. 
; H. W. Fairbanks. The expanded outer 
= ee ioe lip and turreted form suggest the Alaria, 
a a species of which occurs in the Vancouver 
Fic. 3.—Pecten (Camptonectes) Coal Measures.* 
harfordus, twice natural size. (The Dimensions: Height 55 mm.;_thick- 
details are four and eight times ness, about 20 mm.; extension of lip 
natural size.) beyond shell proper, 15 (?) mm. 
Sequoia fairbanksi Fontaine, Mon. 48, U.S.G.S. (1905), p. 78, Pl. XLV, 
FIGs. 9-Il. 
“From the Jurasso-Cretaceous of Slate’s Springs, California. Collected 
in the rocks underlying the Knoxville group of the Lower Cretaceous. This 
Fic. 4.—Pleuromya undulata, one-half natural size 
plant is not unlike those from the Jurassic called by Heer, Elatides” (op. cit.). 
Pecten (Camptonectes) harfordus (n. sp.), FIGS. 3, 5, 6. 
1 Cf. Anchura stenoptera Goldfuss (sp.) Whiteaves, Geol. Surv. Canada, Mesozoic 
Fossils, 1, Pt. Il, p. 123, Pl. 15. 
