36 PUPISOMA. 



This form does not appear to differ materially from P. 

 orcula. As I have not seen specimens, and the locality is re- 

 mote, it may be left on probation. 



American Species. 



[. .Shell with minute spiral strie. P. dioscoricola, 110. 16. 



No spiral strige II 



II. Surface with growth-lines only. P. michoacanense, no. 17. 

 Surface pitted-granulose Ill 



III. About 4 to 4 l /2 whorls P. mediamericanum, no. 20. 



About 31/2 whorls '. . . IV 



IV. Diam. 1.35 mm., umbilicus narrow P. minus, no. 18. 



Diam. 1.5 mm., umbilicus wider P. macneilli, no. 19. 



16. PUPISOMA DIOSCORICOLA (C. B. Ad.). PI. 4, figs. 1, 2, 3, 

 4,5. 



Shell very small, thin, subglobose, imperforate, of 3 very 

 convex whorls ; the last rounded, narrowly indented beneath ; 

 lip thin. Divergence 70 ; alt. .05, greatest diam. .06, minor 

 diam. .05 inch" [about 1.25, 1.5, 1.25 mm.]. Jamaica (C. B. 

 Adams) . 



The shell is globosely conic with obtuse apex, perforate, 

 cinnamon-colored, glossy. Sculpture of unequal growth- 

 wrinkles crossed by fine, impressed spiral lines about equally 

 distinct over the whole last whorl; earlier whorls with gra- 

 nose stria? or somewhat irregular granulation, partly conflu- 

 ent into strife. The tip of the apex is slightly depressed. 

 The whorls are strongly convex. The aperture is truncate- 

 rounded, oblique. Peristome thin, the columellar margin 

 whitish, dilated triangularly and broadly over the perfora- 

 tion. Columella concave. 



Length 1.55, diam. 1.55 mm.; 3 1 /^ whorls (fig. 1). 



Length 1.95, diam. 1.8 mm.; 3% whorls (Brownsville). 



Southern Florida and southern Texas to southern Brazil ; 

 specimens seen by the author from the following localities: 



Florida: Cayo Tuna, Lossman's Key and Cape Sable on 

 the west coast. Cape Florida, Elliotts, Old Rhodes, Little 

 Palo Alto, Angel Fish, Pumpkin, Largo, Long, Lignum Vita? 



