Zoological Society. 563 



Long. 2 ; lat. ex. vai\ '80 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, Conch. Illustr. f. 102. Mur. testd elongatd, 

 subfusiformi, subventricosd, atrd, albd,pallidefuscO'Subfasciatd; 

 transverse lineis moniliformibus striata spirdproductd, anfractibus 

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

 gatd, rectd, paulo exfoliatd, leviter recurvd : varicibus tribus, post 

 angulum trifarihm spinoso-fimbriatis, ad angulum posticum spind 

 crassd, subelongatd, rectd, deinde quinque, brevioribus apertis, 

 quarum primis duabus et ultimd brevissimis, ad caudam duabus 

 subelongatis, und brevi : aperturd magnd, ovali ; labio interna Icevi, 

 paululum extante ; labio externa leviter crenulato, canali recto ^ 

 aperto ; inter stitiis varicum tuber culo valido, turn costd elongatd, 

 plicatd, deinde costd elongatd angustiori subplicatd. 



Long. 3'40; lat. ex. var. 1*50. 



Hab. ? Mus. Cuming. 



There is no danger of confounding this line species with any other. 

 It is intermediate between the clavate and the fusiform groups. 



MuREx PLicATUs, Couch. Illustr. f. 6. Mur. testd clavatd, ven- 

 tricosd, pallide violaced, fulvo tinctd et lineatd : varicibus tribus, 

 costatis crassis, ad latus marginale . crenatis, pone excavatis, 

 ad angulum anfractuum spind crassd brevi, deinde quinque alter- 

 natis, ad caudam tribus, subrectis, subelongatis ; interstitiis tribus 

 ad quatuor costis noduliferis ; spird breviusculd ; aperturd ovali, 

 postice canaliferd; labio crenato ; caudd rectd, crassd, subelongatd; 

 canali fere clauso. 

 Long. 3-0; lat. ex. var. 1*30. 

 Hab. ad sinus Nocoyo. H. Cuming legit. 



Found in coarse sand, at twelve fathoms. Distinguished from other 

 species with elongated caudal canals by its width, and the thickness 

 of the varices, which are deeply excavated at the back, and armed 

 with short thick spines. M. recurvirostris, Brod., is the nearest ap- 

 proach, but is not so wide nor so spinose, and the caudal canal is 

 recurved. 



MuREX FORMosus, Couch. lUustr. f. 91. Mur. testd subclavatd, 

 transverse leviter costatd, scabrosd, fulvo purpurascente : spird 

 subproductd, aculeatd ; anfractibus novem rotundatis ; suturis va- 

 lidis ; caudd elongatd, obliqud, tenui, recurvd, validissime exfoliatd : 

 varicibus tribus d tergo subexcavatis, spind fere elongatd ad angu- 

 lum posticum, deinde tribus apertis subelongatis, cum parvis quin- 

 que ad sex proclivis alternantibus, ad caudam duabus mediocribus 

 ferentibus ; interstitiis trifaridm noduloso-costatis ; aperturd ovali 

 postice subcanaliferd, labio interno antice vix minime extante ; labio 

 externa denticulato, antice extante ; canali aperto. 

 202 



