THE FOSSIL STALK -EYED CBUSTACEA 35 



Branchio-cardiac border separately raised and crossed by many 

 short, fine wrinkles. Epigastric lobes faintly marked; anterior end 

 of mesogastric region outlined. Behind front and orbits a shallow, 

 transverse depression. Antero-lateral margin drawn to a thin 

 sharp edge. Outer angle of orbit obtuse, shallow, little advanced. 

 Front divided in two by a deep median thumb-nail impression, and 

 from the orbit by a broader depression; edge convex. Upper mar- 

 gin of orbit nearly transverse. Orbits looking forward, tapering 

 outwardly, filled by the eyes. 



MeasureTiients. — Holotype, length of carapace 6 mm., width of 

 same 8.4 mm., fronto-orbitai width 4.3 mm., width of front 1.8 mm. 



Occurrence. — ^Washington : West bank of Olequa Creek about one- 

 eighth mile north of Vader Station, Lewis County ; section 29, town- 

 ship 11 north, range 2 west; Eocene series; one carapace, holotype, 

 in University of Washington. 



Relation. — In its oblong shape this species is comparable to that 

 of the female of P. faba^ now living on the coast of Washington 

 including Puget Sound, but foha is a smooth species without an 

 antero-lateral rim, or any striking features of the carapace. 



Family GONEPLACIDAE Rathbun (GONOPLACIDAE Dana) 



Palp of external maxillipeds articulating at or near antero-internal 

 angle of merus; exognath of normal size and not concealed. In- 

 terantennular septum a thin plate. Division of orbit into two fossae 

 usually not indicated. Genital ducts of male usually perforate 

 base of last pair of legs, often passing forward through a groove 

 in sternum. 



Genus PLAGIOLOPHUS Bell 



Plagiolophiis Bell, Monog. Fossil Malae. Crust. Great Britain, 1857 (publ. 

 April, 1858), p. 19; type, P. wetherelU Bell, 1857. 



Carapace transverse, ovate, regions distinct; front prominent; or- 

 bits opening forward, above bifissured, extending outward as far 

 as middle of hepatic region. Basal article of outer antenna closing 

 orbit. Chelipeds of medium size, fingers elongate. 



Cretaceous; Eocene ^.^iMa^iM. 



PLAGIOLOPHUS WEAVERL new species 



Plate 9, figs. 5 and 6 



Cancer? species Weaver, Univ. California Publ. Geol., vol. 4, No. 5, 1905, 



p. 123, pi. 13, fig. 11. 

 Cancer {?), species a Dickeeson, Univ. California Publ. Ceol., vol. 9, No 17, 



1916, pp. 427, 434, 516, pi. 42. fig. 11. 



Description. — Carapace broad, antero-lateral nuirgins short, half 

 as long as postero-lateral margins, which are moderately convergent 



6 Dana. Proc. Acad. Nat. Sci. Philadelphia, vol. 5, 1851, p. 253 [7]. 



