THE CYCL.OPHORID LAN-D MOLLUSKS OF AMERICA 19 



are quite regular on the last turn. It differs from F. (F.) s. collare 

 by its much smaller size. 



The type, U.S.N.M. No. 535917, comes from Loma de Santa Fe. 

 It has 6.5 whorls and measures : Height, 20.0 mm. ; greater diameter, 

 11.8 mm. 



FARCIMEN (FARCIMEN) SEMINUDUM SEMINUDUM (Poey) 

 Plate 4, Figukes 22-24 



1854. Megalomastoma seminudum Poey, Memorias sobre la historia natural de la 

 Isia de Cuba, vol. 1, pp. 405-406. 



This subspecies comes from the region of Trinidad. We have it 

 from La Vigia, Fomento, and Giiinia de Soto, and from Arroyo La 

 Lima, Finca el Retiro, and Cagiieiras in Sancti Spiritus. 



This race is small compared with F. (F.) seminiidum magisfer, from 

 which it is also readily distinguished by the irregularity of the axial 

 riblets of the last whorl. It resembles most closely F. (F.) seminudum 

 guitarti, from which it differs in having the shell much more inflated. 



The specimen figured, U.S.N.M. No. 535915, is one received from 

 Poey without specific locality. It has 5.0 whorls remaining and meas- 

 ures : Height, 22,8 mm. ; greater diameter, 11.7 mm. 



FARCIMEN (FARCIMEN) SEMINUDUM GUITARTI, new subspecies 



Plate 4, Figukes 1-3 



This subspecies was collected by Guitart at Finca Caimiabo, Sancti 

 Spiritus. It is a small race, with the axial riblets on the last turn 

 irregularly developed. It resembles most nearly the typical F. (F.) 

 seminudwn semAinv/ium (Poey), from which it differs by its smaller 

 size and much less inflated turns. 



The type, U.S.N.M. No. 635916, has 5.2 whorls remaining and meas- 

 ures : Height, 21.0 mm. ; greater diameter, 10.4 mm. 



FARCIMEN (FARCIMEN) SEMINUDUM LEONI, new subspecies 



Plate 4, Figures 16-18 



This subspecies was collected by Hermano Leon and Professor Gui- 

 tart at Hornos de Cal, Vista Alegre, Sancti Spiritus, Santa Clara 

 Province. It is a little smaller than F. {F.) seminudum magister and 

 has the axial ribs more strongly developed. It is much larger than 

 the other three subspecies here listed, differing also from F. (F.) semi- 

 nudum poeyi in having the axial ribs stronger and from the other two 

 smaller races in having them regular on the last whorl. 



The type, U.S.N.M. No. 535903, has 4.5 whorls remaining and meas- 

 ures : Height, 25.4 mm. ; greater diameter, 14.0 mm. 



