NON-MARINE MOLLUSCS OF SURINAM. ny 
Pfeiffer, 1872, p. 76. Environs of Paramar ibo 
Martens, 1873, p. 218. Surinam. 
As Pfeiffer himself records this species from Paramaribo, 
I feel not justified to doubt of its occurrence in Surinam. 
Only a careful comparison of the specimen, from which 
the original description was drawn, with the specimens 
collected by Kühn and recorded by Pfeiffer, could give 
evidence on the specific identity. According to Pilsbry 
D. ziegleri is only found in the West of Mexico. 
* 32. BULIMULUS BUENAVISTENSIS Pilsbry. 
Bulimus corneus, Lea (non Sow., 1833), Transact. Am. Phil. 
Soc. Vol. Vi, 1836, p. 66, Pl °23. f 444. 
Bulimulus buenavistensis, Pilsbry, Man. of Conch., 2. ser., 
Vol: X1,-1897, p= 59, Pl.,40,.f:..95. 
Environs of Paramaribo. van Heurn, 1911. 
Post Groningen. van Heurn, 1911. 
This species is easily distinguishable by its very fine 
raised cuticular spirals. The largest specimen measures: 
length 14, diam. 7'/,, length of apert. 7 m.M. 
* 33. BULIMULUS UNICOLOR Sow. 
Bulinus unicolor, Sowerby, Proc. Zool. Soc., 1833, p. 73; 
Conchol. I[llustr., f. 43. 
Bulimulus unicolor Sow., Pilsbry, Man. of Conch., 2. ser., 
Vol. XI, 1897, p. 53, Pl. 10, f. 7. 
Environs of Paramaribo. van Heurn, 1911. 
Only a single specimen of this shell was collected. 
It is somewhat more slender than all my specimens of 
the preceding species, and the spirals, as seen under a 
strong lens, have not the characteristic appearance as in 
B. buenavistensis. Perhaps it might be only a variety of 
the preceding species. 
* 34. ZEBRA BENSONI Rve. 
Bulimus bensoni, Reeve, Conch. Icon., Vol. V, 1849, Bulimus 
spec. 571. 
Oxystyla bensoni Rve, Pilsbry, Man. of Conch., 2. ser, Vol. 
XII, 1899, p. 147, Pl. 31, f. 62—65. 
Notes from the Leyden Museum, Vol. XXXVI. 
