new Gastropoda from the Persian Gulf, &e. 20 
Hab. Gulf of Oman, lat. 24° 58’ N., long. 56° 54’ E., 
156 fathoms. 
Of thesame character superficially as H. candida, Ad., from 
Japan, elongata, Costa, &c., but differing from all in greater 
delicacy and fineness of sculpture. 
Cyclostrema henjamense, sp.n. (Pl. XX. fig. 3.) 
C. testa parva, depresso-discoidali, delicata, albida, profunde sed 
anguste umbilicata; anfractibus 5, quorum duo apicales leves, 
mamillati, vitrei, ceteris apud suturas paullum excavatis, ultimo 
spiraliter septem-carinali, carinis duabus ad peripheriam quam 
maxime conspicuis, undique longitudinaliter arctissime et oblique 
costulatis, costulis supra coronulatis et gemmatis, regione umbili- 
carl circa marginem carinata, deinde costulis longitudinalibus 
perspective delabentibus ; apertura subrotunda, intus alba; peri- 
stomate crassiusculo, continuo. 
Alt. 3, diam. 6 mm. 
Hab. Persian Gulf, Henjam Island, 10 fathoms, amongst 
coarse sand and broken shells. 
A little species, which appears on the borderland between 
Cyclostrema and Liotia, the mouth-characters being Cyclo- 
stremoid. It is a particularly attractive species, the seven 
keels on the last whorl being closely longitudinally inter- 
sected by oblique riblets, these being gemmulate at the points 
of junction. 
Cyclostrema supremum, sp.n. (Pl. XX. fig. 4.) 
C. testa minuta, planato-discoidali, alba, nitidula, profunde umbili- 
cata; anfractibus 5, apud suturas excavatis, quorum duo apicales 
multum canaliculati, levissimi, vitrei, ceteris depressiusculis, 
penultimo uni-, ultimo tricarinato, undique arctissime oblique 
costulato; costulis levibus, interstitiis spiraliter tenuistriatis, 
costularum numero ultimum apud anfractum circa 28, infra peri- 
pheriam et circa regionem umbilicarem leeviore, costulis ad basim 
fere evanidis ; apertura oblique ovali, intus alba, labro paullum 
incrassato. 
Alt, 1:50, diam. 4 mm, 
Hab. Persian Gulf, near Fao. Likewise off Bunder Abbas, 
5 fathoms, mud bottom. 
A most exquisite species, beautifully cancellate and sculp- 
tured, though more or less smooth below the periphery and 
around the narrow but deep umbilicus. he whorls are all 
channelled at the sutures, this with a lens being very distinct 
at the apex. | 
Ughe: 
