RIJKS MUSEUM VAN NATUURLIJKE HISTORIE — LEIDEN. 15 



2. Leptopome melanostoma Petit, var. /3 Tapparone Canefri. 



Tapp. Canefri Fauna Mal. N. Guinea, p. 258. 



Bougainville-Mounts, June, 1, 2, 1910; Hollandia, March 29, 1911. 



Of this variety, with white peristome, one specimen has been collected 

 at each locality, that from the Bougainville-mounts is typical, but the 

 other one is somewhat larger and has faint spirals on upper whorls. 



var. rufolabiata Schepman. 

 Schepman. Moll. N. Guinea, Lorentz. Nova Guinea, XIII, Zoologie, p. 177. 



Near the S.-coast of the Humboldt-Bay, May 17, 1910. 



This specimen is rather doubtful by its larger shape and the spirals 

 on upper whorls, it has been identified, though with some doubt, as 

 belonging to L. melanostoma, by Mr. Gude. 



Cy do tu s Guilding. 

 1. Cyclotus distomellus Sowerby. 



Sowerby. Thes. Conch. Mon. Cyclostorna, p. 114, PI. 25, fig. 94. Pfeiffer. Mou. 

 Pneum. Vol. I, p. 35; II, p. 22; 'ill, p. 29; IV, p. 37, (hebraicus). Tapp. Canefri. 

 Fauna Mal. N. Guinea, p. 251 (hebraicus). 



Hussin, July, 1910; Zoutbron, June, July, 1910; along the Mosso-river, 

 June 2, 1910. 



The specimens are not characteristic, the dark band below the peri- 

 phery being absent or if traceable, broken up ; the synonymy of this 

 species seems to be very uncertain ; according to Kobelt & Möllendorff 

 (Nachrichtsbl. 1897, p. 116), distomellus is the same species as hebraicus 

 of Pfeiffer, but not of Lesson; under these circumstances I follow the 

 advice of Mr. Gude; the specimens from Hussin agree rather well with 

 specimens formerly named by Smith, but have only traces of a dark 

 band or are quite without them ; the specimen from Zoutbron is somewhat 

 intermediate between distomellus Sow. and hebraicus Less., but differs 

 from the former by lacking flames and subperipheral band, from the 

 latter by more descending last whorl; the peristome being broken, the 

 identification is rather doubtful, but it is not advisable to describe a new 

 species on one mutilated specimen; the same is the case with the spec- 

 imens from Mosso, one being quite worn, the other fresh but without 

 band; from the near C. gUttatus Pfr. they may be distinguished by the 

 campanulate outer peristome. 



