THE FOSSIL STAL.K-EYED CRUSTACEA 95 



it is broken off at base but the fracture indicates that it was directed 

 rather forward than outward. Lower surface of carapace granulate. 



Episternum short, subtriangular, separated by a notch from the 

 first somite. First sternal somite suboblong, anterior margin nearly 

 transverse. Second somite anteriorly broader than the first. 



Occurrence. — Southeast quarter of northwest quarter of section 15, 

 on branch of Salt Creek, township 18 south, range 14 east, Mount 

 Diablo base line and meridian, Coalinga quadrangle, Fresno County, 

 California; middle Eocene series, near base of Tejon group, 75 to 

 100 feet above the chocolate shale of probable Chico age, in a glau- 

 conitic sandstone stratum in clay shale; one specimen showing por- 

 tion of under surface, holotype, in University of California. 



RANINOIDES WASHBURNEI. new species 



Plate 22, fig. 6 



Descnytion. — Carapace less convex from side to side than in vadet- 

 CTisis. Surface everywhere punctate ; punctae plainly seen without a 

 lens, largest in the middle, where the narrow interspaces form a lace- 

 like mesh. Submedian grooves emphasized by a small swelling on the 

 outer or branchial side. The fronto-orbital space is wider than in 

 vadei'ensis and the antero-lateral spine projects more outward than 

 in that species. Outer orbital spine broad though incomplete, but 

 the indications are that it is bispinous; the adjoining sinus inclines 

 to a V-shape and the spine beyond it is similar to the corresponding 

 one in vaderensis; there is another, deeper, oblong sinus and a third 

 spine (broken off) either side of the rostrum; only the broad base 

 of the latter is visible. 



In the smaller concretion there are fragments of more than one 

 appendage, including two articles which may be the terminal por- 

 tion of the third or last swimming leg. 



Measurements. — Length of carapace of holotype (estimated) 31 

 mm. ; greatest width, between tips of antero-lateral spines 22.2 mm. ; 

 width half way back 20.7 mm.; fronto-orbital width 14 mm. 



Occurrence. — Oregon: Near Eugene; upper Oligocene series; two 

 small carapaces lacking spines may be young of R. waskbumei; a 

 fragment of a larger carapace is also doubtfully referred to this 

 species. 



Oregon ; Western part, at " Basket Point " on Umpqua River, 12 

 miles below mouth of Calapooia River, Douglas County; middle 

 Eocene series. One carapace in nodule (Cat. No. 353336, U.S.N.M.), 

 holotype, and impression; fragments of appendages in another 

 nodule, said to have occurred next the first one. 



