M. M. SCHEPMAN, LAND- AND FRESHWATER MOLLUSCA ETC. 159 



4. Hemiplecta schumacheriana Pfeiffer. 



Pfeiffer. Zeitschr. f. Malak., 1850, p. 70. 



Pfeiffer. Mon. Helic. Vol. III, p. ni, Vol. IV, p. 110. 



Reeye. Conch. le, Hélix, fig. 379. 



v. Martens. Ostas. Landschn. p. 230. 



v. Martens, Thiele. Mitth. Zool. Mus. Berlin 1908, p. 261. 



Tryon. Man. of Conch. Ser. II, Vol. II p. 43. 



Bornéo. Pontianak. July, 7, 1909. 



This form has often been considered to be a variety of H. densa Ads., so by PFEIFFER 

 (Mon. Hel. Vol. III) V. MARTENS (Ostas. Landschn.) but afterwards thèse authors separated 

 it (PFR. Mon. Hel. Vol. IV) ; (v. MARTENS, THIELE 1. c.) ; for the only spécimen, being an 

 empty shell, I hâve followed this latter view. 



Macrochlamys Benson. 



i. Macroclilamys novoguineensis n. sp. PL IV, fig. 4. 



Shell small, depressed, perforated, brownish, shining, smooth, but sculptured under a 

 strong lens with crowded, spiral striae on the whole surface, except the uppermost '/ 2 whorl, 

 which seems to be quite smooth, spire slightly convex. Whorls 4, scarcely convex, separated 

 by a shallow suture, which is bordered by an infra suturai, narrow, whitish dépression, suture 

 not descending; base of shell slightly depressed, with a very narrow perforation, nearly closed 

 by the columella. Aperture slightly oblique, depressedly lunate, peristome thin, straight, 

 columellar margin oblique, dilated above and reflected over the perforation. 



Diam. maj. 5, ait. 3; apert. ait. 2 1 /,., lat. 2 '/ 2 mill. 



New Guinea, Lorentz River. May, 1907. 



This only spécimen is characterized by its spiral sculpture, which is much fainter than 

 in my M. martini, the thin epidermis is iridescent, but I think only by the action of the 

 preservative, so I hâve not mentioned this character in the description. 



Helicarion Férussac. 



1. Helicarion sp. 



New Guinea. Sabang, Oct. 5, 19 12. Leg. Versteeg. 



One spécimen which I could not identify with one of the known species, is too young 

 for description, the peristome being membranaceous, is mentioned on account of the fine 

 animal, which has a whitish colour with a brown back. By trying to remove the shell, the 

 columellar part was damaged. The shell-lobes are strongly sculptured with coarse warts. The 

 diameter of shell is about 10 mill., the number of whorls scarcely 3. 



2. Helicarion sp. 



New Guinea. Lorentz River. Sept. 22, 1909. 

 This spécimen has still more the character of being quite young, the largest diameter 

 being 5 mill., with about 2 whorls. I hâve only mentioned it, to ascertain the occurrence of 

 the genus, still rarely met with in New Guinea. 



