568 Zoological Society. 



bus, crassis, angulafis, anticc dente unico suhextanti, unico minore 

 a tergo undato-costatis, superne fimbria antice dilatntd, canaliferd, 

 subitu ad cmidam truncatd carinatis: interstitiis tuberculo magno: 

 apertiird magna, ovali ; labio externa undato, extante, antice dente 

 unico armato ; canali nisi ad extremitatem cluuso. 

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



This species presents a near approach to M. Monoceros, nobis, but 

 the canal is closed, and it is also longer and narrower. The varices 

 are fimbriated. The fringe near the canal is suddenly terminated, 

 being in a manner drawn in. 



MuRF.x MONOCEROS, Couch. Illustr. f. 65. Mur. testd rhom- 

 boided, irregulari, transverse minute striata, grised, lineis albis 

 inter fasciis fuscis cinctd : spird mediocri ; anfractibus septem, 

 subangulatis : caudd brevi, lutd, exfoliatd : varicibus quattior ad 

 quinque subdecumbentibus, pauhdum rotundatis, ante quadrifariam 

 denticulatis , uno dente magno prope caudam subextante, uno mi- 

 nore : interstitiis tuberculo magno : apertiird magnd, postice sub- 

 angulatd ; labio extcrno, dente magno prope canalem extante, 

 intiis denticulato, canalifero ; canali aperto. 



Long. 2'25 ; lat. ex. var. 120 poll. 



Hub. ? Mus. Norris. 



A very remarkable shell in the collection of J. Norris, Esq., with 

 a large tooth on the anterior jjart of the outer lip, resembling that 

 in Monoceros. 



MuREX FASCIATUS, Conch. Illustr. f. 86. Mur. testd rhomboided 

 crassd, transverse costatd, albd, vel pallide fulvd,fusco-bifasciatd: 

 spird breviusculd ; anfractibus sex, subrotundatis, paululum angu- 

 lafis : caudd brevi, crassd, compressd, subumhilicatd : varicibus 

 tribus, rotundatis crassis, costatis : interstitiis tuberculo valido, 

 elongato : aperturd ovali, postice subcanaliferd; labio interna lavi; 

 labio externa crenulato, intus dentato ; canali nisi ad extremitatem 

 clauso. 



Long. 1'20; lat. ex. var. •65 poll. 



Hub. ad oras Africanas (River Gambia). 



MuREX vARius, Conch. Illustr. f. 57, 104. Mur. testd crassd, sub- 

 rhomboided, ventricosd, subscab}'osd, jmlUde fulvd, fusco-fasciatd ; 

 rubro-lineatd, lineis extantibus submoniliforniihus transverse sul- 

 catd : spird mediocri ; anfractibus septem, primis angulatis, ultima 

 subrotundatd : caudd brevi, laid, crassd , exfoliatd : varicibus quinque 

 ad septem, decumbentibus , prope angulum posticum a tergo tumu- 

 losis ; tuberculis subsjjinosis, uno ad angulum brevi, crasso, sub- 

 crispato, turn aliquando tribus minutis, deinde tribus majusculis, 

 ad caudam una subelangato : aperturd magnd, subrotundatd, pos- 

 tice subangulatd ; labio interna Iccvi, crasso ; labia externa crenu- 

 lato; canali aperto. 



Long. 2'35 ; lat. ex. var. 1*50. 



Hab. Gambia. Mus. Cuming. 



MuREX TUMULosus, Couch. lUustr. f. 71 . Mur. testd clavatd, ven- 

 tricosd, pallidefulvd,fusca-bifasciatd, transverse scabrosa-sulcatd : 



