S8 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY, 



ON A SrECniEX OF XEXOPnORA PALLID UL A, REEVE, TAKEN 

 OFF POirr BLAIR (ANDAMANS) AT A DEPTH OF 188 FATHOMS, 

 WITH ATTACHMENTS OF PLEUROTOMIL^E, INCLUDING A 

 NEW FORM. 



By G. B. SowEEBY, F.L.S., etc. 



Read November IQth, 1893. 



Tms species of XenopJwra is well known and tolerably abundant 

 in Japanese waters, and it is curious to find it so far out of its 

 habitual latitude as the Andaman Islands : it is further curious 

 to note that all the Pleurotomidce (with the exception of the one I am 

 about to describe) are slightly modified forms of species found in 

 the China Sea. 



The upper whorls caiTy only stones, then come a few fragments 

 of unrecognizable bivalves, then three fragments of BentaUum, after 

 which are the Pleurototnidce in the following order attached to the 

 margins of the two last whorls. 



1. Pleurotoma {Gcnota) atradoides, "Watson. Species taken in the 

 voyage of the " Challenger" ofi' the Philippine Islands. 



2. Pleurotoma {Siircula) fusca, Homb. and Jacq., four shells in a row, 

 rather more angular than the typical form. The species is known in 

 the China Sea, and has also been found in Japan. 



3. A new species, described hereafter. 



4. Pleurotoma (Drillia) sinensis, Hinds. Rather narrower than the 

 typical form. Species found in the China Sea. 



5. Pleurotoma (Surcula) Kieneri, Doumet ( = P. carinata, Reeve, 

 non Gray). Three shells, one in almost perfect condition. This 

 form is shorter, with a more convex spire, and has the space between 

 the two principal rows of nodules narrower than in the Chinese 

 type, which it resembles in every other respect. Between two of 

 the P. Kieneri there is a second specimen of the "Challenger" species, 

 P. actractoides. 



Pleurotoma (Clathttrella ?) rttgidentata, n.sp. PL lY. Fig. 11. 



Testa fusiformis, breviuscula, solidula, rugosa ; spira acuminata, 

 acuta ; anfractus 8, superne concavi, infra medium couA-exe rotundati, 

 costis brevibus instructi ; anfractus ultimus elongatus, superne leviter 

 concavus, delude convexus, infra medium leviter contractus, basin 

 versus attenuatus ; undicjue longitudinaliter plicatus, liris tuberculatis 

 spiraliter sculptus ; apertura mcdiocriter lata ; columella rectiuscula, 

 plicis crassus tuberculiformibus munita ; labrum crassum, intus pli- 

 catum, sinu late expanse emarginato. Long. 19, maj. diam. 7"5 mm. 



Of course the shell is a dead one, being partially embedded in 

 the shell of the Xenophora ; it is, however, in a fair state of preserva- 

 tion as to form and sculpture, but any colour it may have had is 

 wanting. 



