IÇ2 M. M. SCHEPMAN, LAND- AND FRESHWATER MOLLU3CA ETC. . 



Cerithidea Swainson. 

 I. Cerithidea multicostata n. sp. PI. VIII, fig. 3. 



Shell pyramidal, apex moderately decollated, strong, light yellowish-brown, in most 

 cases with a broad, dark-brown band, occupying the lower part of upper whorls and the 

 central part of last whorl, moreover the lirae are often darker, also above the band, and an- 

 other small brown band winds round and at some distance from the columella, at the basai 

 part of shell; in a fevv spécimens the band is replaced by brown lines on the lirae of last 

 whorl. Sculpture consisting of numerous ribs on the upper whorls, especially crowded on the 

 médian ones, about 40 on penultimate one, much more spaced on the last one, where there 

 are about a dozen, amongst which one on the left side forms a conspicuous but not very 

 strong varix, near the aperture thèse ribs nearly disappear; thèse ribs are crossed by more or 

 less conspicuous spiral lirae, which make the ribs somewhat nodulous, and of which the upper 

 and sometimes the lowest nodules hâve the appearance of whitish pearls. Number of whorls 

 about 7, moderately convex, with a conspicuous, crenulated suture. On the last whorl the 

 lirae form rounded tubercles on the ribs; this last whorl, which is broader in Gomparison with 

 the upper ones, is slightly angular by the lowest of the lirae, then slightly flattened and 

 sculptured by 6 spirals and strong growth-lines on the base. Aperture irregularly rounded, 

 with a conspicuous sinus between the base of columella and the wing-like part of the base of 

 peristome ; upper part of peristome strongly expanded, basai part flat; columella nearly straight, 

 contorted, white. Interior of aperture yellowish-brown, with the brown markings of the exterior 

 commonly more visible. Operculum thin, corneous. 



Alt. 35 — 39, lat. 16 — 19 (with peristome); Apert. ait. and lat. (without peristome) about 

 8, with peristome about 10 mill. 



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



I was not very eager to describe a new species in this genus, but my eftbrts to unité 

 it with a known species failed ; in some respects C. rliisoporarum Ads. is nearly allied, but 

 the shell is more pyramidal, the number of ribs much larger, the peristome more expanded, 

 the infra-sutural pearls less developed etc. The colour of C. rhizoporarum is quite différent, 

 no band has been mentioned. 



Fam. TURRITELLIDAE. 



Turritella Lamarck. 



1. Turritella terebra Linné, var. 



Linné. Syst. Nat. Ed. X, p. 766. 



Kiener. Coq. Viv., Vol. IX, Turritella, p. 4, PI. 3, fig. 1. 



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



Two young spécimens belong to a finely lirate form, agreeing with shells formerly 

 named by Mr. E. A. SMITH. 



