88 BULLETIN 138, UNITED STATES NATIONAL MUSEUM 



anteiinules almost always retractile into common oibito-antennulary 

 pits. External maxillipeds generally operculiform. Legs of mod- 

 erate size, fourth and fifth pairs short, subdorsal, and furnished with 

 a small, hook-like nail. Sixth segment of abdomen generally with 

 rudimentary uropods. 



Genus GRAPTOCARCINUS Roemer 



Graptocarchius Roemer, Neues Jahrb. f. Mineral., Geol. u. Palaeout., 1887, 

 vol. 1, Stuttgart, p. 173 ; type, G. texanus Roemer. 



Carapace transversely oval or five-sided, marginate, much swollen 

 dorsally, with almost no indication of regions except for short fur- 

 rows in center of carapace. Rostrum shallow ; orbits deep. 



Cretaceous ; Oligocene. 



GRAPTOCARCINUS (?). species 



Plate 21. fig. 3 j 



i 

 Description. — A damaged remnant encased in a nodule. The '\ 



characters shown are too scanty for accurate determination. The 

 ventral aspect is uppermost but the true surface has been destroyed; 

 the general outline of the orbits is aj)parent and the right eye is 

 preserved; for this reason it seems valuable to place the specimen 

 on record. The carapace except for the fronto-orbital region is 

 suborbicular. The orbits are suboval, nearly meet on the median 

 line and are forward looking; the eye is of moderate size, not filling 

 orbit, slightly enlarged at the cornea (pi. 21, fig. 3c), and in place 

 points obliquely outward and downward parallel with the orbit. ' 

 Outer angle of orbit blunt, little advanced, its outer margin convex, 

 continued on the hepatic region and forming an entering angle with 

 the branchial margin. Owing to the proximity of the orbits, the 

 front appears to have been narrowed or jDointed at the tip. The 

 epistome and interantennular septum as well as the maxillipeds have 

 been broken away, leaving a raised border which anteriorly is ob- 

 lique, but alongside the buccal cavity is longitudinal. Further de- 

 tails are obscured. 



Measurements (approximate). — Length of carapace 13.8 mm., 

 width of same 13 mm. 



Occurrence — Oregon : Springfield Junction, 1 mile Avest of Spring- 

 field, Lane County; Oligocene; one specimen, showing the eye and 

 orbits, general outline of the carapace, and position of the buccal 

 cavity. Cat. No. 353565, U.S.N.M. 



