320 Messrs. J. C. Melvill and R. Standen on 
Kleinella sympiesta*, sp.n. (Pl. XXIII. fig. 16.) 
K. testa perforata, rotundato-ovata, alba, obesa, compressa; anfrac- 
tibus 5, quorum 14 apicales vitrei, perleves, ceteris apud suturas 
gradatulis, ventricosis, undique delicate decussatis, interstitiis 
quadratulis; apertura ovato-lunari, labro paullum incrassato, 
margine minute crenulato, supra late excavato. 
Long. 5, lat. 3°50 mm. 
Hab. Gulf of Oman, lat. 24° 58’ N., long. 56° 54’ E., 
156 fathoms. 
Only two species, of which the best known is K. cancellaris, 
A. Ad., from Corea and Japan, have hitherto been described 
of this genus, and to these we venture now to add a third. 
Undoubtedly they have a close family affinity to each other : 
the K. sympiesta may be known by its particularly obese and 
compressed form and tumid body-whorl ; the umbilicus is 
deep and the outer lip minutely crenulate on the margin. 
Judging alone from conchological grounds, the animal 
being absolutely unknown, we should assign to this genus a 
place near Acteon, Montft., and not, as suggested by some 
authors, consider it one of an outlying group of the Pyrami- 
dellidze. Indeed, were it not for the total absence of the colu- 
mellar plice, we should regard it as a member of the genus 
just mentioned (Acteon). 
Cylichna (Mnestia) bizona, A. Adams. 
(PL. XXL tie 17-) 
Bulla (Cylichna) bizona, A. Ad. in Sowerby, Thes. Conch. pt. 11, vol. ii. 
p. 595, pl. exxy, fig. 148. 
Hab. Gulf of Oman, Maskat, 15 fathoms. 
A large local form (alt. 7, diam. 3 mm.), which we figure, 
as contrasting with the Chinese examples in the Cumingian 
collection and with others. It is a species of wide distri- 
bution, being reported from China, Singapore, Fiji, and 
Torres Straits. 
Cylichna jecoralis, sp.n. (PI. XXIII. fig. 18.) 
C. testa oblongo-cylindrica, delicata, apud basim paullum effusa, 
apice imperforato, plicato, subhyalina, superficie levi, nitida, 
antice posticeque spiraliter striata, pallide livido-olivacea; apertura 
pyriformi, supra angusta, intus cinerea, labro paullum eftuso, 
tenui; columella obscurissime plicata. 
Alt. 11, diam, 5 mm. 
Hab. Persian Gulf, Gulf of Oman, Maskat, 15 fathoms. 
* gupmleatcs, comy ressed, 
