M. M. SCHEPMAN, LAND- AND FRESHWATER MOLLUSCA ETC. 189 



been collected ; I hâve made use of the discarded generic name Nassa, as the opinion of 

 authors often disagrees as to the name and extension of the group. The radula has a médian 

 tooth with 12 cusps and the latéral ones with 2 cusps, of which the proximal one has its 

 distal margin smooth or with one (as figured) or more small denticles, which are often scarcely 

 visible; no accessory teeth could be observed. Number of rows 68. 



Fig. 1. 

 Fam. MURICIDAE. 



Cymia Môrch. 



1. Cymia carinifera Lamarck, var. simplex n. var. PI. VIII, fig. 1. 



Shell differing from the type by being quite destitute of real tubercles and by the 

 much narrower aperture. 



New Guinea. Merauke, 1904. (Dr. Koch leg.) 



This shell has much puzzled me and I was nearly ready to describe it as a new 

 species, however the gênerai appearance and sculpture, induced me to consider it merely as 

 a variety of the very variable C. carinifera; only the upper whorls display very faint traces 

 of tubercles, the last one quite smooth, but for the fine sculpture. The nearest figure at hand, 

 is that of Reeve (Conch. le, Purpura, sp. 26), the figures of KlENER, even his fig. 36^, are 

 much more elaborate. 



2. Cymia dubia n. sp. PL VIII, fig. 2. 



Shell fusiformly-ovate, greyish-brown wit darker keels. Whorls 6".,, the nuclear ones 

 smooth and rounded, subséquent ones in gênerai appearance convex, angular near the upper 

 part, with a conspicuous suture, 2 prominent keels in the upper whorls, of which the upper one 

 at the angle, the lower one just above the suture in the uppermost whorls, a little above it 

 in the penultimate one, last whorl with 4 pronounced keels and 4 flatter ones on the canal ; 

 moreover the whole post-nuclear shell is covered with finer lirae, 5 in number above the 

 uppermost keel in the last 2 whorls, 4 above the next 2 keels, 2 above the last keel, besides 

 a few intermediate ones, the lirae and interstices are crossed by fine elevated striae ; canal 



