139 



Long. 3-40; lat. ex. var. loO. 



Hab. ? Mus. Cuming. 



There is no clanger of confounding this fine species with any other. 

 It is intermediate between the clavate and the fusiform groups. 



MuREX PLiCATUs, CoHch. lUustr. f. 6. Mur. testd clavatd, ven- 

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

 costatis crassis, ad latus viarginale crenatis, pone excavatis, 

 nd unguium 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; labia crenato ; caudd rectd, crassd, subelongatd; 

 canalifere 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 rottindatis ; suturis va- 

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

 varicibus tribus ci 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 trifariam noduloso-costatis ; aperturd ovali 

 postice subcanaliferd, labia interna antice vix minime extante; labia 

 externa denticulato, antice extante; canali aperto. 

 Long. 3"15 ; lat. ex. var. 1'05 poll. 



Hab. ad Loay, Ins. Bohol. Mus. Cuming, Sowerby, Stainforth. 

 This belongs to the group of which M. Motacilla forms the type. 

 It is an extremely elegant shell ; the caudal canal is gracefully curved 

 and exfoliated. Sandy mud, 7 fathoms. 



MuREX MiNDANAENsis, Couch. Illustr. f. 92. MuT. testd subcla- 

 vatd, subventricasd, transverse sulcatd, pallide fusco-rufescente ; 

 spird productu, anfractibus acta rotundatis, suturis validis ; caudd 

 elongatd, subrecurvd, exfoliatd : varicibus tribus, validis, rotunda- 

 tis, pani subexcavatis ; ad angulum posticum spind unicd brevi ; 

 deinde spinis quinque brevioribus, parvisque quinque proclivis al- 

 ternantibus : interstitiis tricostatis ; aperturd ovali ; labio externa 

 crenulato, margine dent at a ; labio interna Icevi, paulo extante; ca- 

 nalifere clauso. 



Long. 3 ; lat. ex. var. 'So ; cauda, 1'5. 



Hab. prope Cagayan, provinciae Misamis ad insulam Mindanao 

 Philippinarura. H. Cuming legit. 



This beautiful and very distinct species presents a medium between 



