THE FOSSIL STALK-EYED CRUSTACEA 41 



Measurements. — Holotype, male (probably), length of carapace 

 25 mm., width of same between tips of teeth of last pair 31.2 mm., 

 width of front 12 mm., oblique width of orbit 4.3 mm., superior 

 length of major manus 12 mm,, height of same 10.6 mm., length of 

 dactylus exclusive of tip broken off 12 mm., superior length of minor 

 manus 8.6 mm. 



Occurrence. — Washington: Conglomerate sea cliffs at Koitlah Point 

 west of Xeah Baj^ ; lower (?) Oligocene series ; one specimen, para- 

 type tf, showing half the carapace and part of the chelipeds. 



Washington: Sandy shale bluffs along Cowlitz River, fi/^ miles 

 below mouth of Drew Creek, Olequa; Eocene series; one specimen, 

 paratype 5, showing a fragment of carapace, of arm and of merus of 

 three ambulatory legs. 



Oregon : Basalt tuffs cut on the Tillamook branch. Southern 

 Pacific Eailway, one mile east of Wheeler, Nehalem Bay; middle ( ?) 

 Oligocene series; one specimen, holotype, showing a large part of 

 carapace and chelipeds; in Stanford University. 



Relation. — This species differs from P. carman aJiensis in the flat 

 hepatic region, more arched front, shallower orbit, subrectangular 

 second antero-lateral tooth, and elongate hand. 



PILUMNOPLAX SOLEDADENSIS, new species 

 Plate 12 



Description. — One male specimen (holotype) embedded in rock, 

 shoAving dorsal view of carapace and portions of chelipeds and legs. 

 The sternum was broken from its place and is turned backward 

 behind the carapace. An impression of the same specimen shows 

 the outline of the front and bears the actual movable finger of the 

 Inajor cheliped. Surface of carapace finely roughened with de- 

 pressed granules. Mesogastric region defined by shallow furrows, 

 from it a median furrow runs to the front margin. A swelling 

 behind each lobe of the front; lobes well separated by a U-shaped 

 interspace, their edges granulate, slightly oblique and sinuous, each 

 lobe with a small, prominent tooth at inner angle, which is separated 

 by a shallow sinus from the rounded outer corner (pi. 12, fig. 2). 

 Outer angle of orbit acute, its outer margin fused with the second 

 antero-lateral tooth forming an obtuse angle; third tooth slightly 

 obtusangled, its anterior margin two-thirds as long as posterior; 

 fourth tooth similar, but anterior margin shorter; fifth tooth very 

 small, rectangular, directed outward. Postero-lateral margin longer 

 than antero-lateral, convex (pi. 12, fig. 1). 



The chelipeds appear unequal, the right the larger; the right 

 merus has a blunt, superior subdistal tooth; the left carpus is of 

 equal width and length, with an inner marginal spine halfway back; 



