1 NON-MARINE MOLLUSCS OF SURINAM. 
IN 
face rather smooth, with many growth-markings and fine 
spiral lines, visible only under the lens. Whorls 6, very 
slightly convex, the last one nearly half the total length. 
Aperture ovate, oblique; peristome thin, sharp; columellar 
margin narrowly reflexed. 
Length 17, diam. 9'/,, length of aperture 9 m.M. (Para- 
maribo). 
Length 18, diam. 9, length of aperture 9 m.M. (Ta- 
panahoni). 
Type in the Leyden Museum. 
Environs of Paramaribo. van Heurn, 1911. 
Tapanahoni. Tapanahoni-Expeditie. 
This species is characterized by the two subperipheral 
bands being uninterrupted, the lower one encircling the 
nearly closed umbilicus. The last whorl is faintly carinate. 
The Tapanahoni-specimens (fig. 6) have the apex blackish 
brown. 
* 24. DRYMAEUS QUADRIFASCIATUS nov. sp. (fig. 4). 
Shell imperforate, conic, fragile, thin; whitish with four 
spiral dark-brown bands, placed at equal distances, two 
supraperipheral, and two subperipheral, surface glossy, with 
many growth-markings. Whorls about 5, nearly plain, the 
last one more than half the total length; apex blackish 
brown. Aperture ovate, oblique; peristome thin, sharp; 
columellar margin reflexed over the umbilicus. 
Length 16'/,, diam. 9, length of aperture 9'/, m.M. 
Type in the Leyden Museum. 
Jan Basi Gado. Saramacca-Expeditie. 
The two specimens, possibly not fully developed, have 
the outer margin of the peristome somewhat damaged. 
The species will be easily recognized by the four continuous 
brown bands. 
* 95, DRYMAEUS FLAVIDUS Menke. 
Bulimus flavidus, Menke, Verzeichn. der Conch.-Samml. des 
Freiherrn v. d. Malsburg, 1829, p. 6. 
Notes from the Leyden Museum, Vol. XXXVI. 
