163 



teriorly; those of the median series are a little more suddenly- 

 rounded anteriorly than posteriorly; while those belonging to the 

 supraperipheral cord are truncated suddenly posteriorly and slope 

 gently anteriorly. The spaces between the spiral cords and axial 

 ribs are small, moderately rounded, well impressed pits. Suture 

 constricted, showing a portion of basal cord. Periphery of last 

 whorl marked by a deep, spiral groove as wide as that separating 

 the first supraperipheral cord from the median spinal cord, and, 

 like it, crossed by the continuations of the axial ribs. Base short, 

 well rounded, marked by a broad, spiral cord which is truncated 

 posteriorly and slopes gently anteriorly toward the shallow well- 

 marked groove which separates it from the base proper. Entire 

 surface of spire and base marked by numerous, very slender, in- 

 cremental lines. Aperture irregularly oval, very strongly chan- 

 neled anteriorly; posterior angle obtuse; outer lip thin, showing 

 the external sculpture within, rendered decidedly sinuous at the 

 edge by the external sculpture; columella stout, moderately long, 

 the edge reflected; parietal wall glazed with a thin callus." — 

 Bartsch. 



2342 Columbella penicillata Cpr. 



2343 Odostomia helga Dall & Bartsch. 



2344 Modiolus opifex Say. 



2345 Eulima bitorta Van. 



2346 Turbonilla button! Dall & Bartsch. 



The above were collected on San Geronimo Island, the follow- 

 ing on Cerros Island. 



2347 Triton gibbosuni 



2348 Conus gradatus Mawe. 



2349 Cymatiuin corragatum Lam. (See 2557). 



2350 Latirus lugubris C. B. Adams. 



2351 Area reeviana Orb. 



2352 Columbella fasciata Sby. 



2353 Ischnochiton acrior 



2354 Ischnochiton didymus Bartsch. 



2355 Ischnochiton clathratus 



2356 Ischnochiton conspicuus 



2357 Callistochiton crassicostatus 



2358 Callistochiton decoratus 



2359 Henderson, Junius: 



Some Wyoming shells. Nautilus 27:37. 



2360 Oreohelix hendersoni dakani 



Junius Henderson, Nautilus 27:38. 



Type locality: — near Newcastle, Colorado. 



2361 Pilsbry, H. A.: 



Note on a new variety of Epiphragmophora tudiculata. Nau- 

 tilus 27:49. Describes var. Grippi, with figures, and mentions the 

 following named varieties: — 



2362-2368 Varieties cypreophila, umbilicata, convicta, subdolus, 

 tularensis, binneyi, and grippi. 



2369 Oreohelix yavapai extremitatis 

 Shell creek canyon, Shell, Wyoming. 



2370 Oreoheilx pygnmea 



Same locality. Pilsbry, Nautilus 27:52. 



