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3. Nemarura pouita, Sowerby. JN. testd magnd, castaneo- 
fused, compressd, subvaricosd ; aperturd ovali, peritremate an- 
tice striato ; regione umbilicali lird callosd cireumdato ; punc- 
tato-striatd. 
Mus. Cuming. 
4. Nematura onivacea, A. Adams. WN. festd ovatd, opacd, 
olivaced, viridi-fusco reticulatd ; aperturd oveli, spird elevatd, 
apice decollato, peritremate simplict. 
Mus. Cuming. 
5. NeMATURA GLABRATA, A. Adams. WN. testd magnd, ovatd, 
non compressd aut varicosd, subviridi-corned; spird acutd, 
apice acuminato, levi, politd; aperturd orbiculari, angustatd, 
peritremate ngro. 
Hab. Penang. Mus. Cuming. 
6. NemaTuRA PUNCTICULATA, A. Adams. WN. testd mediocri, 
pallide fulvd, compressd, anfractu ultimo gibboso, et subangu- 
lato ad latera, lineolis punctatis transversis ornatd, peritre- 
mate simplici. 
Hab. Eastern Islands. Mus. Cuming. 
8. A MonoGRAPH OF THE RECENT SPECIES OF RIMULA, A GENUS 
or MoLLUSCA, BELONGING TO THE FAMILY FISSURELLID&. 
By Artuur Apams, R.N., F.L.S. etc. 
The genus Rimula of Defrance has been usually confounded with 
Puncturella of Lowe, or the Cemoria of Leach, but it is at once 
distinguished by the absence of the arcuated plate in the interior of 
the vertex. The species already known are fossil, to which we now 
add a few recent examples. 
Genus Rimuta, Defrance. 
Shell conical, with an elevated, recurved, entire vertex, turned 
towards the posterior end; surface cancellated, with radiating ribs ; 
a linear perforation in the upper part of the shell, half-way between 
the vertex and anterior margin; margin of aperture crenulated ; in- 
terior simple, with no shelly plate; muscular impression crescentic, 
interrupted in front. 
1. Rrmvuta exauisita, A. Adams. R. testd magnd, ovali, semi- 
pellucidd, albd, costis longitudinalibus, radiantibus, lineisque 
elevatis, transversis, concentricis, cancellatd ; cancelli subqua- 
drati; costis crenulatis, inequalibus, prominentibus, anterio- 
ribus duabus divergentibus, interstitits costellis duabus in- 
structis ; supra perforationem concavd ; perforatione elongatd 
subquadratd. 
Had. Catanuan, island of Luzon and island of Burias, found on 
dead shells, 7 and 10 fathoms, sandy mud (H. C.). Mus. Cuming. 
