DESCRIPTIONS OF NEW SPECIES OF MARINE SHELLS. 507 



the types of all these small species in the Natural History Museum, South 

 Kensington. 



1. BlTTIUM TENTHRENOIS, n, 8p. PL Fig. 1. 



B. testa cylindrica, obesula, doliiformi, solida, ochracea, apice obtuao, apud" 

 spicatn, simul ac ad basim pallidiore, anfractibus 7, in medio latioribus, tribua 

 papillarutn ordinibus transversim regulariter instructis, papillis parvis, gem- 

 matis, interstitiis, alveolatis, apertura ovato-rotunda, labro exteriore minima 

 expanse. Long. 3, lat. 1*25 mm. 



About twenty specimens of a small, tun-shaped, cylindrical shell, warm och- 

 raceous in colour, with the extremities pale, almost white, ornamented with 

 -three rows of papilliform gammas on the whorls, the spaces between them 

 being alveolate, whence the specific name, derived from Tt»9§af, " honey- 

 combed." This species is slightly like Cerithiopsis pulvts, Issel, from the Red 

 Sea, a very small species, which, with the present one, I should be inclined to- 

 class rather as a Bittium. 



2. Cerithiopsis rubricincta, n. sp. PI. Fig. 15. 

 0. testa fusiformi, solida, pallide ochracea, anfractibus 10 vel 11, tumidis, 

 apud suturas impressis, binis gemmarum ordinibus transversim decoratia, longi- 

 tudinaliter clathratis, interstitiis alviolatis, infra juxta suturas tenui rubra 

 zona accinctis, apertura subrotunda, peristomate tenui, canali brevi. Long, 

 3"25 mm. sp. maj , lat. 1 mm. 



Yery beautiful, though minute. Of a pale ochraceous colour ; the ven- 

 tricose whorls are ornamented, just below the sutures, with a red band ; the 

 sculpture is, as is usual amongst the Triforis, Bittium and Cerithiopsis a 

 double row of transverse gemmae, crossed by lattice forming ribletSi the 

 interstices being honycombed and deep. The mouth is almost round, canal 

 very short, lip simple. Several specimens. 



3. Cerithiopsis sykesii, n. sp. PI. Fig. 8. 

 C. testa attenuato fusiformi. aciculata, ochracea, anfractibus 12 vel 13, 

 rectis, minime ventricosulis, trinis gemmarum papillif ormium ordinibus trans- 

 versim cingulatis, apud suturas impressis, in uno specimine juveni duobus 

 apicalibus anfractibus pellucidis, vitreis, apertura subquadrata, simplice. 

 Long. 4'25, lat. 1*20 mm. 



A tropical representative, of the typical species of the genus, C. tuber cularis, 

 Mont., from which this shell differs in being straighter, more attenuate, and 

 regular. It comes nearer to the C. diadema, Watson, from Madeira, of which 

 I have only seen a figure, but is smaller than that species. It is of a uniform 

 pale ochraceous-brown, and the single young individual of the series posr,edses 

 two vitreoos apical whorls intact. I have much pleasure in connecting with 

 this small Cerithiopsis the name of Mr. E.B.Sykes, our indefatigable Secretary. . 

 4. Cerithiopsis pulcherrima, n, sp. PI. Fig. 3. 

 U. testa tenui, multum attenuata, aciculari, albida, anfractibus 13, apud 

 luturas canaliculatia, apud ganales uno gemmularum ordine, caetarasque ife 



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