562 Zoological Society. 



The next paper read was from Mr. G. B. Sowerby, Jun., and is 

 entitled " Descriptions of some new species of Murex, principally 

 from the collection of H. Cuming, Esq." 



Murex Occa, Conch. Illustr. f. 45. Mur. testd clavatd, ventri- 

 cosd, fulvo-glaucescente ; spird mediocri ; cuudd longissimd, redd, 

 ad terminum subexpansd, subreciirvd ; anfractibus angulatis trans- 

 verse leviter sulcatis ; varicibus tribus, spinis dorsalibus tribus 

 brevibus falcatis, tribusque minutissimis alternantibus , deinde ad 

 caudam tribus ad qiiatuor subrectis, interstitiis bituberculatis ; 

 aperturd ovatd, rotundatd, postice subangulatd ; labio crenulato, 

 dente unico magno lato viarginali ; canali fere clauso . 



Long. 3 ; lat. extra varicibus, 1 poll. 



Hab. ad insulas Nicobaricas. 



The comparative smoothness of the whorls, and the short, curved 

 character of the dorsal spines, are sufficient to distinguish this from 

 other clavate species. 



MuEEX Messorius, Conch. Illustr. f. 93. ATur. testd clavatd, 

 subventricosd, fulvo-rubescente, griseo, rubra, fuscoque maculatd ; 

 spird brevi ; caudd elongatd, recta, angustd, minime recurvd ; va- 

 ricibus tribus, crassis, costatis, ante crenulatis , pone foveolatis , ad 

 angulum posticum spind brevi redd, ad caudam spind falcatd , sub- 

 elongatd, deinde una breviore, rectd ; interstitiis duobus ad tribus 

 costis noduliferis ; aperturd ovali, postice subcanaliferd ; labio in- 

 terno postice tumido, intiis crenulato ; labio externo denticulato, 

 antice paululum extante ; canali fere clauso. 



Long. 2-40; lat. ex. var. '90 poll. 



Hab. ? Mus. Cuming, Stainforth. 



Distinguishable by the thickened varices, and the spine at the 

 base of the caudal canal, shaped like a reaper's hook. 



Murex rectirostris. Conch. Illustr. f. 95. Mur. testd clavatd, 

 subventricosd, transverse costatd, pullide fulvd, fusco-rubescentc 

 bifasciatd ; spird mediocri, anfractibus octo, rotundatis ; suturis 

 excavatis: caudd elongatd, angustd, rectd ; varicibus tribus, crassis, 

 anti crenulatis, pone excavatis, ad angulum jiosticum spind crassd, 

 brevi, prope caudam tribus minutis proclivis, ad caudam duabus seu 

 tribus tenuibus, rectis : interstitiis tricostatis ; aperturd ovali, peri- 

 tremate exta?iti, labio externo crenulato; canali fere clauso. 



Long. 2 80 ; lat. ex. var. 1 poll. 



'I'he spire is more elongated, the caudal canal is longer and more 

 straight than in M. recurvirostris, Brod. 



Murex nigrescens. Conch. Illustr. f. 98. Mur. testd subclavatd, 

 subrhomboided , transverse leviter costatd, grised, nigro bifasciatd, 

 ad apicemfusco-rubescente : spird subproductd, anfractibus septem, 

 subangulatis, inter varices trifariam tuberculiferis ; suturis validis : 

 caudd elongatd, rectd, tenui ; varicibus tribus, validis, rotundatis, 

 noduliferis, pone subexcavatis, ad angulum tuberculo subspinoso, 

 ad basin caudcB spinis duabus : aperturd ovali, labio interno albo, 

 postice tumido, antice extante, crenulato, labio externo denticulato, 

 intiis crenulato ; canali clauso. 



