16 NON-MARINE MOLLUSCS OF SURINAM. 
Zebra bensoni Rve, Strebel, Mitteil. Naturhist. Mus. Hamburg, 
XXVI, 1909, p. 93, T. 20, f. 310, 314, 317, 318, 321. 
Nickerie. Voltz. 
Upper Saramacca. Saramacca-Expeditie. 
Environs of Paramaribo. van Heurn, 1911. 
Guyana Goldplacer (on the Mindrinetie). van Heurn, 1911. 
Albers, 1860, p. 225. Surinam, 
Pfeiffer, 1872, p. 76. Environs of Paramaribo. 
Martens, 1873, p. 218. Surinam. 
The Saramacca-specimen measures: length 62, diam. 
31'/, m.M., the largest one of the other specimens: length 
43, diam. 23 m.M. 
35. ZEBRA PULCHELLUS Spix. 
Achatina pulchella, Spix, Testac. Brasilia, 1827, Pl. 9, f. 2. 
Oxystyla pulchella Spix, Pilsbry, Man. of Conch., 2. ser, Vol. 
XII, 1899, p. 135, Pl. 28, f. 27—37. 
Zebra pulchellus Spix, Strebel, Mitteil. Naturhist. Mus. Ham- 
burg, XX VI, 1909, p. 57, T. 10, f. 150, 151, 154—156. 
Pfeiffer, 1859, p. 588. Surinam. 
Pilsbry, 1899, p. 136. Surinam. 
? 36. ZEBRA PRINCEPS Brod. 
Bulinus princeps, Broderip, Proc. Zool. Soc., 1832. 
Sowerby, Conch. Illustr., 1833, Bulimus, f. 18. 
Orystyla princeps Brod., Pilsbry, Man. of Conch., 2. ser, 
Vol. XII, 1899; p. 443, Pl. 46, Pl. 47, £. 10 A2 
Zebra princeps Brod., Strebel, Mitteil. Naturhist. Mus. Ham- 
burg, XXVI, 1909, p. 18, T. 4, f. 1—3, 5—11, T. 2, 
f. 21, 25—28, 31, 32. 
Kappler, 1887, p. 204. Surinam. 
I suppose Kappler has mistaken Z. pulchellus or bensoni 
for this Central-American species. 
* 37. CORONA PERVERSA Swains. 
Achatina perversa, Swainson, Zool. Illustr. 1, 1820—21, Pl. 36. 
Liguus perversus Swains., Pilsbry, Man. of Conch., 2. ser., 
Vol. XII, 1899, p. 178, Pl. 36, f. 20—23. 
Corona perversa Swains., Strebel, Mitteil. Naturhist. Mus. 
Hamburg, XX VI, 1909, p. 132, T. 27, f. 400, 403, 408. 
Surinam. Coppename-Expeditie. 
Lucie River. Corantijn-Expeditie. 
Notes from the Leyden Museum, Vol. XXXVI. 
