44 
tened, above transversely striated, below smooth ; aperture subcircular, 
angulated above; umbilicus very wide, the whorls visible 'within it. 
Hab. Dumaguete, island of Negros ; H. C. (Mus. Cuming.) 
Cyclostrema micans, Adams. C. testd turbinatd, minutd , albd, 
nitida, anfractibus convexis, longitudinaliter oblique cost ell at is, 
transversim carinulatis, cavinulis nodulosis; umbilico rnediocri; 
aperturd circulari ; peristomate continuo, incrassato. 
Hab. Australia. 
Shell turbinated, small, white, shining, whorls convex, longitudinally 
obliquely ribbed, transversely carinated, keels nodulous; umbilicus 
moderate ; aperture circular ; peristome continuous, thickened. 
Hab. Port Lincoln; Metcalf. (Mus. Cuming & Metcalf.) 
Cyclostrema elegans, Adams. C. testd orbiculari, discoided, 
tenui, semipellucidd; spird depressd, anfractibus rotundatis, 
transversim omnino striatis ; suturis distinctis; aperturd sub- 
circulari, supra angulatd ; umbilico peramplo. 
Hab. in insulis Philippinis. 
Shell orbicular, discoid, thin, semipellucid; spire depressed, whorls 
rounded, entirely transversely striated ; suture distinct; aperture sub- 
circular, angulated above; umbilicus very wide and open. 
Hab. Sibonga, island of Zebu, 10 fathoms, sandy mud; H. C. 
(Mus. Cuming.) 
Cyclostrema sulcata, Adams. C. testd orbiculari, discoided ; 
spird planiusculd, anfractibus convexis, costellis transversis 
confertis regularibus, interstitiis profunde sulcosis; suturis 
profundis canaliculatis ; umbilico patulo ; peromphalo Icevi. 
Hab. in insulis Philippinis. 
Shell orbicular, discoid ; spire rather flattened, whorls convex, 
with regular, transverse, small ribs, numerous and close together, in¬ 
terstices deeply grooved; suture canaliculated ; umbilicus open ; um¬ 
bilical area smooth. 
Hab. Tambay, island of Negros, coarse sand, 6 fathoms; H. C. 
(Mus. Cuming.) 
Cyclostrema angulata, Adams. C. testd orbiculari, discoided; 
spird depressd, anfractibus transversim costellatis, costellis 
regularibus, cequidistantibus, interstitiis tenuissime striatis; 
anfractu ultimo biangulato, supra costellato, in media piano, * 
infra costellato; aperturd subangulatd; peritremate inter- 
rupto ; umbilico permagno. 
Hab. in insulis Philippinis. 
Shell orbicular, discoid; spire depressed, whorls transversely cos- 
tellated ; ribs small, equal, equidistant, interstices very finely striated ; 
last whorl biangulated, costellated above, smooth in the middle, and 
ribbed beneath ; aperture somewhat angulated; peritreme not con¬ 
tinuous ; umbilicus very large. 
Hab. Sibonga, island of Zebu, 10 fathoms, sandy mud; II. C. 
(Mus. Cuming.) 
