44 BULLETIN ISl, UNITED STATES NATIONAL RIUSEUM 



Type : Megalomastoma -fiavuJa Swainson = Helix cvocea Gmelin = 

 Farclmen (Neopvpina) croceum (Gmelin). 



The anatomy of Farcimen (N.) croceum (Gmelin) and F. {N.) 

 curtum (Dall and Simpson) yields the radiila formula 3:3:3:3. The 

 jaw is provided with a median projection, and the verge is attached 

 to the side of the neck, gradually tapering without a terminal ap- 

 pendage. It is traversed by a seminal groove. 



KEY TO THE SPECIES OF SUBGENUS NEOPUPINA 



Axial ribs strong curtum 



Axial ribs not strong. 



Shell large, height more than 30 mm croceum 



Shell small, height less than 20 mm hjalmersoni 



FARCIMEN (NEOPUPINA) CURTUM (Dall and Simpson) 



Plate 9, Figures 32-34 (type) ; Figukes 35-37 



1901. Megalomastoma croceum curtum Dall and Simpson, Bull. U. S. Fish Comm. 

 for 1900, vol. 1, p. 434, pi. 53, fig. 2. 



Shell small, varying from elongate-ovate to cylindroconic in outline, 

 varying in color from wax yellow to pale brown. Nuclear whorls 

 decollated in all our specimens. Postnuclear whorls moderately well 

 rounded, marked by rather strong, closely approximated axial riblets. 

 Suture well impressed. Periphery well rounded. Base moderately 

 produced, very narrowly umbilicated, with a strong carina marking 

 the outer edge of the umbilicus. Aperture subcircular ; peristome not 

 in one plane, but somewhat sinuous, simple. Operculum typically 

 farcimenid. 



The type, U.S.N.M. No. 159678, comes from Hucares, east Puerto 

 Rico. It has 5.5 whorls remaining and measures : Height, 21.0 mm. ; 

 greater diameter, 9.5 mm. 



This small species differs from the other two from Puerto Rico in 

 having the riblets much more strongly developed. 



Additional specimens come from various stations on the eastern 

 slope of Puerto Rico, and since the type is a worn specimen, I am also 

 figuring a more j^erfect one, which has almost 7 whorls and measures : 

 Height, 23.0 mm. ; greater diameter, 9.1 mm. 



The animals of specimens collected by me about the roots of banana 

 trees at Mamey in the foothills of the Sierra Luquilla, June 23, 1929, 

 had the entire dorsal part of the body flesh colored with a grayish 

 suffusion and a pinkish flush; the sole of the foot was also flesh 

 colored, while the tentacles were pale orange with a grayish tinge. 

 There was a reddish spot present under the tentacles. 



