NON-MARINE MOLLUSCS OF SURINAM. 11 
This is the form, somewhat resembling A. glabra Gmel., 
recorded by von Martens, 1873, p. 176. I think it is also, and 
even more, resembling A. aurissciuri Guppy, as figured by 
Pilsbry, Man. of Conch., 2. ser., Vol. X, Pl. 41, f. 42—44. 
Apparently this form is not rare in Surinam. The largest 
specimen measures 40'/,m.M., the smallest one 26 m.M. 
?21. AURIS GLABRA Gmel. 
Voluta glabra, Gmelin, Syst. Nat. p. 3436. 
Auris glabra Gmel., Pilsbry, Man. of Conch., 2. ser., Vol. X, 
1896, p. 113, Pl. 44, f. 33—37. 
Drouet, 1859, pp. 42, 65. Surinam. 
Martens, 1873, p. 218. Surinam. 
I suppose von Martens gives the locality ,Surinam” upon 
the authority of Drouet ; this author says that this species has 
been found in British and Dutch Guyana, without quoting 
any author upon which this statement is founded. Upon 
de Grateloup’s authority Drouet includes this species in his 
list of land- and freshwater-molluses of French Guyana. 
The preceding form of A. distorta is not unlikely to have 
been mistaken for this West-Indian species. 
* 22. DRYMAEUS SEMIMACULATUS Pilsbry. 
Bulimus maculatus, Lea (non Brug., 1792), Transact. Am. 
Phil. Soc. VI, 1839, p. 86, Pl. 23, f. 142. 
Drymaeus semimaculatus, Pilsbry, Man. of Conch., 2. ser., 
Vol. XI, 1898, p. 297, Vol. XII, 1899, PI. 5, f. 8, 9. 
Environs of Paramaribo. 1904. 
Post Groningen. van Heurn, 1911. 
The fullgrown specimen from Paramaribo is agreeing 
nearly exactly with the definition and figures, given by 
Mr. Pilsbry; only it is slightly larger, its length being 
about 25 m.M., its diam. 11 m.M. 
* 23. DRYMAEUS INTERRUPTOFASCIATUS nov. sp. (figs. 5, 6). 
Shell subperforate oblong-conic, thin; yellowish corneous, 
with five spiral dark-brown bands, the upper three more 
or less interrupted, the lower two broad, continuous. Sur- 
Notes from the Leyden Museum, Vol. XXXVI. 
