138 



ricibus tribus, crassis, costatis, ante crenulatis, ponefoveolatis, ad 

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

 elongatd, deindh unci breviore, rectd ; interstitiis duobus ad tribus 

 costis noduliferis ; aperturd ovali, postice subcamliferd ; labia in- 

 ferno postice tumido, intiis cremdato ; labia externa denticulato, 

 antice paululum extante ; canali fere clauso. 



Long. 240 ; lat. ex. var. -90 poll. 



Ifab. ? 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, 

 subventricasd , transverse costatd, pallide fulvd, fusco-rubescente 

 bifasciatd; spird mediocri, anfractibus acta, ratundatis ; suturis 

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

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

 brevi, prope caudam tribus minutis praclivis, ad caudam duabus sen 

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

 tremate extanti, labia externa crenulato ; canali fere clauso. 



Long. 280 ; 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, Couch. Illustr. f. 98. Mur. testd subclavatd, 

 subrhomboided, transverse leviter costatd, grised, nigra bifasciatd, 

 ad apicemfusco-ruuescenie : spird subproductd, anfractibus septem, 

 subangulatis, inter varices trifarium tuberculiferis ; suturis validis : 

 caudd elangatd, rectd, tenui ; varicibus tribus, validis, ratundatis, 

 noduliferis, pone subexcavatis, ad angulum tuberculo stibspinoso, 

 ad basin cauda spinis duabus : aperturd ovali, labia interna alba, 

 postice tumido, ant id extante, crenulato, labia externa denticulato, 

 intiis crenulato ; canali clauso. 

 Long. 2 ; lat. ex. var. -SO poll. 

 Hab. ad Xipixapi. H. Cuming legit. 



More ventricose and less clavate than M. recurvirostris, Brod., with 

 a larger aperture, thinner varices, and straighter caudal canal. The 

 sutures of the spire are not excavated, and the varices are very 

 slightly so. Sandy mud, 11 fathoms. 



MuREX PLiciFERUs, Couch. lUustr. f. 102. Mur. testd elangatd, 

 subfusiformi, subventricasd, atrd, albd, pallide fusco-subf asciatd ; 

 transverse lineis monilifarmibus striata spird productd, anfractibus 

 novem, subangulatis, siituris validis, subexcavatis ; caudd subelon- 

 gatd, rectd, paulo exfoliatd, leviter recm-vd : varicibus tribus, past 

 angulum trifariam spinoso-fimbriatis, ad angulum posticum spind 

 crassd, subelongatd, rectd, deinde quinque, breviaribus apertis, 

 quarum primis duabus et ultimd brevissimis, ad caudam duabus 

 subelongatis, und brevi : aperturd magnd, ovali ; labia interna lavi, 

 paululitm extante; labia externa leviter crenulato, canali recto, 

 aperto ; interstitiis varicum tuberculo valido, tum costd elangatd, 

 plicatd, deinde costd elangatd angustiori subplicatd. 



