l68 M. M. SCHEPMAN, LAND- AND FRESHWATER MOLLUSCA ETC. 



var. roseolabiata n. var. 



This species seems to be allied to P. bevani Braz. in HEDLEY's. Land Moll. Fauna of 

 British New Guinea (Proc. Linn. Soc. N. S. Wales, 1S91, p. 85, PL ri, fig. 22, 23) but that 

 species, as far as I can judge from the description and figure, is still larger and much flatter, 

 with a black keel but no infra-sutural line. 



4. Papnina tomasïnelliana Tapparone Canefri. 



Tapp. Canefri. Fauna Mal. New Guinea, p. 148, PI. 4, fig. 1, PI. 5, fig. 1, PL 7, fig. 3, PL 8. 



fig. 6, 12. 

 Pilsbry. Man. of Conch. Ser. II, Vol. VII, p. 44. PL 7, fig. 27, 28. 



New Guinea. River Camp, Febr. 2, 1910; Van Weel's Camp, May 27, Tune 6, 1907 ; Sabang, June 

 20— ;3o, July 20, 1907; Bivak Island, June, July, Aug. 23, 1907; Alkmaar, July, Aug. 1907; 

 Lorentz River, Sept. 25, 1909. 



The spécimens are without exception larger than the type of Tapp. CANEFRI, a spé- 

 cimen from Alkmaar reaching even 43 mill. in diameter and so surpassing considerably the 

 largest spécimens recorded by V. MÔLLENDORFF (Proc. Mal. Soc. Lond. Vol. I. p. 237), whose 

 largest spécimen measured 39 mill., moreover he calls them var. Maclayana Braz., uniting 

 the two forms, without mentioning in how far his spécimens are malleated, as P. maclayana 

 Braz. (Proc. Linn. Soc. N. S. W. Vol. X, p. 841) must be. The spécimens under considération, differ 

 in this respect from my only spécimen of P. maclayana, which has the last whorl not sub- 

 constricted, as is the case with P. tomasinelliana. I was inclined to distinguish the spécimens 

 as forma major, but they vary from a trifle larger than the type, to 43 mill., without distinct 

 limits. In other respects they vary in the distinctness of the bands and in being more or less 

 depressed. PlLSBRY (Man. of Conch., Ser. II, Vol. IX, p. 344) states on the authority of 

 Beddome, that P. plnrizonata Ads. & Rve. should be an elder name for tomasinelliana, but 

 as a comparison with his figure (Man. of Conch. Ser. II, Vol. VII, pi. 59, fig. 4, 5) is not 

 convincing, I hâve not adopted this view. 



5. Papnina helkvigensis n. sp. PL V, fig. 4. 



Shell small, depressedly trochoidal, nearly equally convex above and below the rather 

 blunt peripheral keel, yellowish, the upper whorls lighter than the last one, with a red-brown 

 line on the keel; shell shining, with fine striae or growth-lines. Whorls about 4",, (spire slightly 

 damaged) slightly convex, separated by a well-marked suture, which is slightly crenulated, as 

 well as the keel, by the sculpture being stronger there ; last whorl convex below, scarcely 

 descending behind aperture, impressed round a nearly imperceptible perforation. Aperture 

 oblique, rounded-rhomboidal, peristome thin, slightly expanded, (upper margin broken) whitish, 

 columellar margin purplish, more dilated, spread over and nearly closing the perforation, 

 margins connected by a thin layer of enamel, purplish around the columella. 



Diam. maj. 13, ait. 10; apert. ait. (diagonally) 6, lat. 7 mill. 



New Guinea. Talk, Helhvig Mountains. Sept. 5, 1907. 



This small species though slightly damaged and scarcely quite adult, the peristome 

 being too thin in comparison with other species, is very interesting, I know no species with 



