PUPISOMA. 39 



dioscoricola by the characters and figures which have ap- 

 peared. A figure was copied by Try on from Crosse & Fischer 

 in MANUAL, vol. Ill, pi. 9, fig. 7. Von Martens' figures are 

 reproduced in our pi. 4, figs. 13, 14. All of these were drawn 

 from specimens from Morelet. The original description 

 follows. 



"H. pit net urn. Shell covered-perf orate, small, globose, tur- 

 binate, corneous-rufous; whorls 3%, convex; aperture lunar; 

 peristome simple, acute, the columellar margin a little re- 

 flected, vaulting over the umbilicus. Diam. 1% mm. On 

 leaves of trees in gardens of the city of Merida" (Morelet). 



Neither Crosse and Fischer nor von Martens give any 

 account of the sculpture, though these authors figure speci- 

 mens from Morelet. Presumably the shell appeared smooth 

 under a hand lens, a higher power being required to bring 

 out the spiral striation in most of this group. 



Pupisoma americanum Mlldff. appears from the descrip- 

 tion, translated below, to be identical with dioscoricola. Von 

 Moellendorff supposed that no similar form had been reported 

 from America, and therefore did not compare dioscoricola, 

 punctum and caca. 



"Pupisoma americanum. Shell narrowly and half-covered 

 perforate, conoid-globose, thin, subpellucid, distinctly striat- 

 ulate, buff-corneous. Spire convexly conoid, obtuse at apex. 

 Whorls scarcely 4, convex. Aperture strongly oblique, sub- 

 circular, moderately excised ; peristome unexpanded, the colu- 

 mellar margin dilated above, reflected. Alt. 1.75, diam. 1.75 

 mm. Cuenca, Ecuador." Strubell collection. (Moellendorff, 

 Nachrbl. d. Mai. Ges., vol. 31, June 1899, p. 91.) 



Spiral striation is not mentioned, yet as it would not be 

 seen with a hand lens, it is probably present. Moellendorff 

 did not mention it in describing his P. philippinicum. He 

 evidently did not use a microscope. 



P. dioscoricola insignt n. subsp. PL 4, figs. 6, 7, 8. 



Sculpture rougher by the presence of coarse wrinkles or 

 low riblets at unequal intervals among the finer growth- 

 ripples; whorls 3% to nearly 4. Other characters as in 

 typical dioscoricola. 



