's BUKS MUSEUM VAN NATUURLIJKE HISTORIE — LEIDEN. 9 



var. albolabiata n. var. 



An adult specimen from the same locality has a pure white peristome, 

 but as the dark markings are as conspicuous as in the other ones, it 

 cannot belong to var. albina, which is quite white, Avith hyaline spots. 



B. DITREMATA. 



Fam. Vagin ulidae. 



Prisma Simroth. 



1. Prisma prismatica Tapparone Canefri. 



Tapp. Canefri. Fauna Mai. N. Guinea, p. 207, PI. 11, fig. 0—8. Co! linge. 

 Journ. of Malac. Vol. IX. 1902, p. 130, PL 9, fig. 4— G. 



Upper part of Sermorvai-river, under leaves, May 1, 1911. 



The only specimen has no dark spots on the underside, as figured 

 by Collinge, so it is in accordance with the original description of Tapp. 

 Canefri. By its narrow foot-sole, it no doubt belongs to P. prismatica. 



Suborder GtEHYdrophila. 



Fam. Auric ulidae. 



Pythia Link. 



1. Pythia pantherina A. Adams. 



A. Adams. Proc. Zool. Soc. London, 1850, p. 152. Pfeiffer. Mon. Auricul. 

 Vol. I, p. 94. Kitster. Martini-Chemn. Conch. Cab., Ed. II, Auriculacea. p. 62, 

 PI. 9, fig. 3, 4 (pyramidata). Mousson. Moll. Java, p. 49, PI. 5, fig. 10 (pyra- 

 midata). v. Martens. Siiss- u. Brackw.-Moll. des Ind. Arch. p. 136. 



Mouth Sermorvai-river, March 3, 1911 ; Hollandia, 1910/11 ; environs 

 of Hollandia. 



Though v. Martens (1. c.) suggests that this species may be a form 

 of P. scarabaeus L., as the largest specimen, mentioned by Mousson 

 (1. c), has a length of 34 mill, and he has found a specimen of P. scara- 

 baeus, measuring only 20 mill, near Tawalli, all the New Gruinean speci- 

 mens agree in size and shape with P. pantherina, so I keep it separate, 

 untill the identity has been doubtless established. 



