22 PKOCEEDINGS OF THK MALACOLOGICAL SOCIKTY. 



The thickly keeled periphery, narrow umbilicus, and spirally 

 striated interstices, with sculptured base, distinguish this handsome 

 species, which is large for the genus. 



Nearly allied to, if not absolutely identical with, the original type 

 of the genus C. cancellatum, Marryat, which, however, is an Antillean 

 species. 



6. Cyclosteema. exiguum, Philippi. 

 Cydostrema exiguum, Philippi : Zeits. fiir Malak., 1849, p. 25. 



^«^.— Gulf of Oman, lat. 24° 58' N., long. 56°54'E., 166 fathoms. 



One specimen, without much doubt referable to this species, the 

 type having been described from Aden. It is, though small, an 

 elegant form, the body-whorl being ornamented with four keels, which 

 are crossed by close longitudinal riblets, giving a gemmulate appearance. 



7. CrCLOSTREMA GYALUM, Melvill. 



Cydostrema gynlum, Melvill: Proc. Malac. Soc, vol. vi, p. 54, pi. v, 



%: 22. 



Eah.—(iu\i of Oman, lat. 24°58'N., long. 56°54'E., 156 fathoms. 



Very small, but most conspicuous for the thrice-keeled body-whorl, 

 the keels large proportiouatelj- and very acute, the umbilicus being 

 particularly profound. 



8. Cyclosxrema Henjamense, Melvill & Standen. 



Cydostrema Henjamense, Melvill & Standen : Ann. & Mag. Nat. Hist., 

 vol. xii (1903), p. 291, pi. xx, tig. 3. 



Hal. — Persian Gulf, Henjam Island, 10 fathoms, amongst coarse 

 sand and broken shells. 



This species is on the borderland between the genus in which it is 

 placed and Liotia ; the body-whorl is noticeable for its seven carinae, 

 closely radiately intersected by slanting riblets, beaded at the points of 

 junction. 



9. Cyclosteema micans, A. Adams. 



Cydostrema micans, A. Ad. : Proc. Zool. Soc, 1850, p. 44. 



pulchella, Dunker: Malak. Blatt., vol. vi'(I860), p. 225. 

 Liotia puldiella, Dunker. 



Hab. — Karachi (F. W. T.) ; Bombay (A. Abercrombie). 



On the borderland between Liotia and Cydostrema, the body -whorl 

 possessing three spiral beaded costulae, the umbilicar region being 

 likewise much decorated with two or three other similar rows, the 

 umbilicus itself being small. Near C. anaylyptum, A. Ad., or 

 C. ocrinium, M. & S. 



10. Cyclosxrema novem-carinatum, n.sp, PI. Ill, Figs. 3, 2>a. 



C. testa parva, profundc umbilicata, depresso-orbiculari, alba, paruni 

 nitida, anfractibus 5, quorum 2 apicales vitrei, minutissimi, cseteris 

 ad suturas excavatis, antepenultimo et penultimo binis, ultimo an- 

 fractu novem carinis (interdum apud sutuias duabusminoribus additis), 



