PUPISOMA. 41 



Length 1.35, diain. 1.23, length of aperture 0.7 mm.; 3y 2 

 whorls. 



Florida: Crystal River, Citrus Co. (C. B. Moore); Tick 

 Island, Volusia Co. (Pilsbry & Johnson, 1894) ; Bade Co. at 

 Lemon City (S. N. Rhoads), and Snapper Creek, south of 

 Cocoanut Grove, type loc. (Morgan Hebard). Elliott's Key, 

 Pumpkin Key, Ft. Lauderdale, near Coot Bay, Cape Sable. 

 Jamaica: Maudeville, Manchester (A. P. Brown); west of 

 Port Antonio (Henderson). Guatemala: Chama (A. A. 

 Hinkley ) . 



Thysanophora dioscoricola (C. B. Ad.), CLAPP, Nautilus, 

 xxxi, Jan. 1918, p. 75, pi. 8, f. 2. 



All of the specimens from Florida were found in leaf and 

 earth siftings, only one or a few from each of the localities 

 mentioned. It is readily differentiated from P. dioscoricola 

 by the minute size, larger umbilicus, less rapidly expanding 

 whorls, and especially by the sculpture. Half-grown Bothrio- 

 pupa variolosa has similar sculpture, but the first whorl is 

 much smaller and the last less ample, besides differing in 

 form. 



The single example from Crystal River ( in western Florida 

 about 25 miles below Cedar Keys) has a low prominence on 

 the columella, in an oblique view (pi. 4, fig. 10). Further 

 specimens from this part of the state should be examined, as 

 no such structure appears in any other specimens seen. 



The two specimens from Guatemala and four from Jamaica 

 do not seem to differ from those of Florida. 



This species stands close to P. macneilli Clapp, but appears 

 to differ constantly by the narrower umbilicus and the more 

 oblique aperture. It has not the riblets at irregular intervals 

 of P. medianiericanum and does not attain to the size of that 

 species. 



P. minus was first recognized as a distinct species by Dr. 

 G. H. Clapp, who figured it as dioscoricola. 



19. PUPISOMA MACNEILLI (Clapp). PI. 4, fig. 15. 



Shell small, globose, with about four well-rounded whorls; 

 suture deep ; color chestnut-brown, somewhat shining ; sur- 



