new Gastropoda from the Persian Gulf, de. 303 
apertura ovata, labro effuso, basim versus paullum producto, 
incrassato ; columella obliqua. 
Long. 5:25, lat. 2 mm. 
Hab. Gulf of Oman, lat. 24° 58! N., long. 56° 54’ E., 
156 fathoms. 
An attenuate graceful species of the typical section of the 
genus, angled below the periphery, nine-whorled, the three 
globularly bulbous apical whorls being distinctive, the longi- 
tudinal ribs on the fourth and fifth whorls being fewer and 
more pronounced than on the lower—indeed they become 
obsolete below the periphery of the body-whorl. With a 
lens the delicate spiral striation is discernible. Mouth 
triangularly ovate, outer lip produced at the base. 
ftissoina (Zebina) registomoides, sp.n. (Pl. XXI. fig. 13.) 
A. testa perminima, globulari, solidula, levissima, nitida; anfracti- 
bus 5, quorum apicalis obtusus, vitreus, ceteris apud suturas 
subimpressis, ventricosulis, ultimo paullum effuso, obliquato ; 
apertura ovato-rotunda, labro incrassato, albo, nitente. 
Long. 2°25, lat. 1:50 mm. 
Hab. Gulf of Oman, lat. 24° 58’ N., long. 56° 54! E., 
156 fathoms. 
Very minute, but extremely interesting. We are indebted 
to Mr. EK. R. Sykes for its discovery, while sorting shell- 
sand received from the above most rich dredging. It is 
much smaller and more globose than any Zebina yet de- 
scribed; the peristome is wonderfully incrassate for so small 
a shell and quite simple, never dentate, thus being unlike 
any of the numerous varieties of R. tridentata, Mich., = 
Hulima curta, Sowb. The facies is eulimoid, but it possesses 
the apex of a Azssoina, and we are satisfied as to its location 
here. ‘The trivial name is suggested by its form, when 
magnified, though more globular, somewhat resembling the 
terrestrial Registoma fuscum, Gray. 
Eulimella carmanica, sp.n. (Pl. XXI. fig. 14.) 
E. testa minuta, fusiformi, albo-lactea, levissima, polita, tenui; 
anfractibus 8-10, quorum apicales heterostrophi, hyalini, lactei, 
ceteris fere rectis, apud suturas leniter canaliculatis, supernis 
paullum gradatis, ultimo recto, prolongato; apertura quadrato- 
rotunda, labro recto; columella obliqua, simplici. 
Long. 4, lat. 1°20 mm. 
Hab. Gulf of Oman, lat. 24° 58’ N., long. 56° 54’ H., 
156 fathoms. 
