568 Zoological Society, 



bus, crassis, angulatis, antice dente unico subextanti, unico minore 

 d, tergo undato-costatis, superne jimbrid antice dilatatd, canaliferd, 

 subito ad caudam truncatd carinatis: interstitiis tuber culo magno: 

 aperturd magnd, ovali ; labio externa undato, extante, antice dente 

 unico armato ; canali nisi ad extremitatem clauso. 

 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, Conch. lUustr. f. 65. Mur. testd rhom- 

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

 inter fasciis fuscis cinctd : spird mediocri ; anfractibus septem, 

 subangulatis : caudd brevi, latd, exfoliatd : varicibus quatuor ad 

 quinque subdecumbentibus , paululum rotundatis, ante quadrifariam 

 denticulatis , una dente magno prope caudam subextante, uno mi" 

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

 angulatd ; labio externo, dente magno prope canalem extante, 

 intus denticulato, canalifero ; canali aperto. 



Long. 2-25 ; lat. ex. var. 1'20 poll. 



Hab. ? Mus. Norris. 



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

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

 in Monoceros. 



MuREX FAsciATus, Conch. lUustr. f. 86. Mur. testd rhomboided 

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

 spird breviusculd ; anfractibus sex, subrotundatis , paululum angu- 

 latis : caudd brevi, crassd, compressd, subumbilicatd : varicibus 

 tribus, rotundatis crassis, costatis : interstitiis tuberculo valido, 

 elongato ■: aperturd ovali, postice subcanaliferd; labio interno Icevi; 

 labio externo crenulato, intus dentato ; canali nisi ad extremitatem 

 clauso. 



Long. 1;20; lat. ex. var. '65 poll. 



Hab. ad oras Africanas (River Gambia). 



MuREx vARius, Conch. lUustr. f. 57, 104. Mur. testd crassd, sub- 

 rhomboided, ventricosd, subscabrosd, pallide fulvd, fusco-fasciatd; 

 rubro-lineatd, lineis extantibus submoniliformibus transverse sul- 

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

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

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

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

 crispato, turn aliquando tribus minutis, deinde tribus majusculis, 

 ad caudam uno subelongato : aperturd magnd, subrotundatd, pos- 

 tice subangulatd ; labio interno Icevi, crasso ; labio externo 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, pallide fulvd, fusco-bifasciatd, transverse scabroso-sulcatd : 



