THE FOSSIL STALK-EYED CRUSTACEA 53 



Rockj' Point, 4 miles east of the town of Yaquina; it is in a rail- 

 road cut a few feet west of bridge No. 9 ; 5G specimens. 



Sandy shale cut along the Corvallis and Eastern Railway between 

 Rocky Point and Oysterville, Yaquina Bay; 14 specimens. 



Elk City, Lincoln County; one specimen. 



Near Pioneer Quarry near Elk City ; two specimens. 



One mile south of Springfield Junction, Lane County; one im- 

 pression. Cat. No. 353397, U.S.N.M. 



One mile west of Springfield Junction; one small specimen in a 

 nodule showing only middle portion of carapace, also impression of 

 same; Cat. No. 353398, U.S.N.M. 



ZANTHOPSIS HENDERSONIANUS, new species 



Plate 10, figs. 5 and 6 



Descnption of hoJotype. — Carapace very convex in both directions 

 especially antero-posteriorly. Branchial region separated by a broad, 

 deep furrow from the cardiac and intestinal regions and by a shal- 

 lower furrow from the gastric region. Twelve bosses or swellings, 

 for the most part conical, are distributed on the posterior two-thirds 

 of the carapace; four are branchial, tw^o along the postero-lateral 

 border, the posterior of Avhich is elongate-triangular in a longitu- 

 dinal direction, one is near the inner angle of the region while the 

 fourth is lower and situated further outward and forward ; the four 

 remaining elevations are median, one urogastric at the middle or 

 highest point of the carapace, one very low, mesogastric, one very 

 large covering the cardiac region, one low and squarish or trans- 

 versely oblong covering the intestinal or posterior cardiac region. 

 A broad transverse gutter lies in front of the posterior margin. 

 Hepatic region flat and obliquely cleflexed. Gastric region not dis- 

 tinctly subdivided; protogastric lobes convex, mesogastric depressed 

 except for the posterior hump : two small transverse epigastric 

 tubercles (pi. 10, fig. 5). 



Orbit small, its inner angle less advanced than the front, its outer 

 angle triangular, acute, and less advanced than the inner angle. 

 Inner lower angle triangular. Antero-lateral margin thick, a small 

 blunt horizontal tooth at lateral angle, and in front of it two slight 

 lobes; between the first of these and the orbital tooth the margin is 

 slightly convex. Postero-lateral margin high without marginal line. 



Paratypes. — The carapace of paratypes a and h are only about 28 

 or 29 mm. wide; the edges are broken. Paratype a shows the teeth 

 of the anterior margin (pi. 10, fig. G) ; two triangular frontal teeth, 

 tips 2.5 mm. apart, and distant 3 mm. from the tips of the inner 

 orbital teeth. The shape and position of the dorsal bosses are the 

 same as in the holotype. No details of the ventral surface of para- 



