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. lUustr. f. 45. Mur. testd clavatd, ventri- 

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

 ad terminum subexpansd, subrecurvd ; anfractibus angulatis trans- 

 verse leviter sulcatis ; varicibus tribus, spinis dorsalibus tribus 

 brevibus falcatis, tribusque minutissimis alternantibus, deind^ ad 

 caudam tribus ad quatuor subrectis, interstitiis bituberculatis ; 

 aperturd ovatd, rotundatd, postice subangulatd; labio crennlato, 

 dente unico magno lata marginali; canalifere 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. 



Murex Messorius, Conch. lUustr. f. 93. Mur. testd clavatd, 

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

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

 ricibus tribus, crassis, costatis, ante crenulatis, pon'^foveolatis, ad 

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

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

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

 terno postic'h tumido, intils crenulato ; labio externo denticulate, 

 antice paululum extante ; canalifere 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, pallid^ fulvd, fusco-rubescente 

 bifasciatd; spird mediocri, anfractibus octo, rotundatis ; suturis 

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

 ante crenulatis, pone excavatis, ad angulum posticum spind crassd, 

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

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

 tremate extanti, labio externo crenulato ; canalifere clauso. 



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



The 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 apicem fusco-rubescente : spird subproductd, anfractibus septem, 

 subangulatis, inter varices trifaridm tuberculiferis ; suturis validis : 

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

 noduliferis, pone subexcavatis, ad angulum tuberculo subspinoso, 

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

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

 intus crenulato ; canali clauso. 



