158 



DESCRIPTIONS OF TWENTY -EIGHT SPECIES OF GASTROPODA 

 FROM THE PERSIAN GULF, GULF OF OMAN, AND ARABIAN 

 SEA, DREDGED BY MR. F. W. TOWNSEND, OF THE INDO- 

 EUROPEAN TELEGRAPH SERVICE, 1900-1904. 



By J, Cosmo Melvill, M.A., F.L.S. 



Head lOth June, 1904. 



PLATE X. 



In oiferinp: another contribution towards the elucidation of the 

 molluscan fauna of the Persian Gulf and contiguous seas, I would 

 point out that, as was the case in my last paper on the subject,' 

 nine tenths of the following small and abyssal species were extracted 

 from sifted sand, dredged at one prolific station. Already nearly 

 one hundred species, new to science, have resulted from this gathering, 

 and the quota is not, even yet, exhausted. A good many dubious 

 specimens and imperfect, broken examples of strange forms, as might 

 be expected, also occur, which are, naturally, not considered, but this 

 fact only serves to emphasize the more than pi'obability of the 

 supposition that these explorations have so far only touched the 

 threshold of benthal life, and that these hitherto scarcely known 

 seas possess within their profounder recesses many wonderful forms, 

 waiting to be revealed some day. 



We have not had time as yet thoroughly to diagnose the Pelecypoda 

 of this region, but Mr. R. Standen and I hope to complete the 

 catalogue before very long, and likewise, at the same time, to give 

 emended lists of some of the leading Gastropod families. 



Except where otherwise stated, ail the species are from the Gulf of 

 Oman, lat. 24° 58' N., long. 56° 54' E., 156 fathoms. 



Cyclostrema eumares,- n.sp. PL X, Figs. 1, \a. 



C. testa miniita, umbilicata, tenui, alba, nitida, Isevi, anfractibus 

 3-4, quorum duo apicales, Ifeves, globulosi, cseteris ad suturas 

 paululum excavatis, tumidis, ultimo permagno, supra la^vi, versus 

 basim longitudinaliter sub lente scalpto-striato, regione umbilicari, 

 spiraliter trilirata, excavata, crenulata, liris longitudinalibus decussata, 

 apertura rotunda, peristomate tenui, continuo. Alt. 1, diam. l'75mm. 



Very small, and perhaps not full-grown. Several examples occurred, 

 one possessing a linguiform appendage to the peristome, slightly 



Proc. Mah Soc, vol. vi, pt. 1, pp. 51-60, pi. v. 

 fVjxapT)s, well-adapted, gentle. 



