Geological Papers. 195 



surface marked with numerous very fine, revolving lines; suture 

 distinct; aperture semilunar; lip thin. 



Dimensions: Longest diameter, 28; transverse diameter, 20; alt., 

 15; aperture in longest diameter, 22; transverse diameter, 19.5. 



A single specimen of this species was obtained from the middle 

 series at East Clallam. 



Miocene: Astoria, Ore. (Conrad). 



Oligocene-Miocene : East Clallam, Wash. (Arnold; Reagan). 



Superfamily Docoglossa; Family LXXXIV TROCHmiE. 

 Genus Trochita Schumacher. 



31. Thochita inornata Gabb. Plate III, fig. 31. 

 Trochita inornata Gabb (See Gabb, Pal. Cal, vol, II, 1869). 



Shell irregularly depressed, low, conical, almost circular in out- 

 line; height two-thirds of width; volutions about two and one-half; 

 suture indistinct to obsolete; surface of specimen entirely without 

 ornamentation. 



Dimensions: Diameter, 25; alt., 9. 



The specimen obtained is from the lower series, East Clallam. 



Miocene of California (Gabb). 



Oligocene-Miocene: East Clallam, Wash. ( Reagan). 



Superfamily TiENiOGLOSSA; Family Doliid.^; Genus Dolium Lam. 



Shell spirally ribbed; outer lip notched internally, canal short, 

 obliquely directed. 



32. Dolium petrosum Con. plate III, fig. 32; times, one-half. 

 Dolium petrosum Con., Wilkes's Expl. Expedition, vol. X, p. 722, pi. ly, 



figs. 3, 5. 

 Semiosis petrosus Con., Sm. Check List No. 474. 

 Dolipopsis petrosus Con. , Jour. Conch. , 1865, p. 150. 



Shell large, subglobose to ovate globose in general outline; 

 about a third higher than broad; whorls four or five in number: 

 body whorl large and broadened at base by a broad reflected lip; 

 spire moderately elevated; volutions distinct, carinated; surface 

 marked by raised, rounded, revolving ribs, about twenty-one on the 

 body whorl, with wide intervening grooves; the tenth and sixteenth 

 spiral elevations are nodose, the nodes on the former being faintly 

 shown, on the latter very pronounced, and the interspaces between 

 the nodes continue as slightly depressed areas from base to apex of 

 shell; shoulder angular, tuberculate, having a slightly concave 

 space below the angle; also a revolvins^ prominent line; aperture 

 large; outer lip reflected. 



By comparing the shell here described with the one in the geo- 



