610 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.51. 



SPECIFIC CHARACTERS. 



The material examined readily breaks up into two subgroups, which 

 we shall consider species. 



The southern species, Epiphragmopliora cuyamacensis, has the last 

 whorl uniform papillose above and below, while in the northern, 

 Epiphragmopliora trasJcii, the last whorl lacks the uniform papilla tions. 



KEY TO SUBSPECIES. 



a', Shell papillose above and below on all the whorls E. cuyamacensis, p. 610. 



b\ Umbilicus half closed by the reflected inner lip; greater diameter 25 mm,, 



c. avus, p. 610. 

 b^. Umbilicus not half closed by the reflected inner lip; greater diameter less than 

 21 mm. 



c', Papulations uniform over entire base c. renturensis, p. 611, 



c^, Papillations not uniform over entire base. 



f/', Papillations obsolete on the rounded portion of base a little behind 



the aperture c. cuyamacensis, p . 611, 



a\ Shell not papillose above and below on all the wliorls E. trasHi, p. 610, 



b\ Obliquely protractively slanting lines of papillae on the nucleus, very faint. 



c\ Shell subglobose t. tularica, p. 615. 



C-, Shell decidedly depressed. 



d\ Shell large, diameter of type 31 mm t. zechae, p. 615. 



d-, Shell smaller, diameter of type, 20 mm t. proles, p. 616. 



b^, Obliquely protractively slanting lines of papillae on the nucleus, well devel- 

 oped. 



c\ Surface of shell with clothlike sculpture t. coronadoensis, p. 617. 



c', Sm'face of shell not with clothlike sculpture. 



(/', Umbilicus narrov,-, more than half covered by the reflected inner lip. 



e\ Shell decidedly inflated t. coelata, p. 617. 



e'-, Shell not inflated (. car-penteri, p. 617. 



d~, Umbilicus wide, less than half covered by the reflected inner lip. 

 e', Papulation on whorls succeeding the nuclear turns stronger than 



those on the nucleus /. phlyctaena, p. 618. 



e'^, Papulation on whorls succeeding the nuclear turns not stronger 



than those on the nucleus t. trashii, p . 612. 



EPIPHRAGMOPHORA CUYAMACENSIS AVUS, new subspecies. 

 Plate 116, figs. 16-18. 



This is a giant race resembling the large form of typical Epiphrag- 

 mopliora trashii. It has the inner lip reflected over haK of the rather 

 narrow umbihcus. The entire upper surface and the mside of the 

 umbilicus are strongly papillose, while the roimded basal portion is 

 almost smooth, the lines of growth being the most conspicuous fea- 

 ture. The spiral sculpture is obsolete. 



The type (Cat. No. 120588, U.S.N.M.) comes from Los Angeles 

 County, California. It has 5.5 whorls and measures — greater diam- 

 eter, 25 mm.; altitude, 14.6 mm. 



