Zoological Society. 569 



spird hrevi ; anfractuum suturis excavatis : varicibus sepiem, va- 

 lidis, crassis, costatis, ante crenulatis, pone excavatis, ad suturas 

 tumulosis ; ad medium anfractuum spinis duabus subelongatis, 

 rectis ; ad caudam spinis tribus : caudd elongatd : aperturd magnd, 

 ovali, postice subangulatd ; antice margine sub-producto, intus 

 crenulato. 



Long. 3' 60 {caudce, 2*3); lat. ex. var. 1 30. 



Hab. ? Mus. Stainforth. 



This species differs from M. cornutus, in the thickness of the va- 

 rices, which are excavated behind. The sutures of the spine are 

 also excavated. 



MuREX VARicosus, Conch. lUustr. f. 49. Mur. testd subclavatd, 

 transverse sulcatd, albd, ad varices fusconigricante : varicibus 

 sex, tumidis, subfrondosis , antice inciso-fimbriatis, pone frondes 

 Itevibus, integris, postice ad anfractum proximum dilatatis, ultimo 

 magis expansd, digitatd : spird breviusculd ; suturis anfractuum 

 excavatis : caudd subelongatd, latd : aperturd rotundatd, albd ; 

 canalifere clauso: caudd subelongatd, latd. 

 Long. 1-70; lat. ex. var. -80. 



Hab. .? Mus. Stainforth. 



This species differs from M. secundus, in being much less oblique, 

 in not having the labial varix so much larger than the rest, in ha- 

 ving a greater number of varices and a somewhat longer spire, and 

 in attaining a larger size. 



MuREx DiGiTATUs, Couch. lUustr. f. 79. Mur. testd pyriformi, 

 transverse costata, roseo-fulvd: spird breviusculd; anfractibusquin- 

 que, ventricosis, angulatis, superne complanatis ; suturis excavatis : 

 caudd longiusculd, ad basin latd, gradatim angustiore : varicibus 

 octo, costatis, digitatis, postice usque ad medium proximi anfractixs 

 prolatis; digitis numerosis, nigrescentibus , subproclivibus, rugosis, 

 palmatis, minoribus alternantibus : aperturd ovali; labio externa 

 crenulato ; lamind canalis latd. 

 Long. r55; lat. ex. var. "80 poll. 

 Hab. ad insulam Messonam. Mus. Cuming. 

 In general form resembling M. Scorpio, M. secundus and M. va- 

 ricosus, but differing from them in being much straighter, having 

 many more varices, the digitations being less connected, and in their 

 being continued across the body of the shell in the form of intersti- 

 tial ribs. 



MuREX MEGACERus, Couch. lUustr. f. 18. Mur. testd rhomboided, 

 subventricosd, fulvo-rufescente, intiis alba, transverse scabroso^ 

 sulcatd : varicibus quinque, ad caudam exfoliatis ; frondibus sub- 

 rectis, crassis, ad terminum foliatis, und ad angulum anfractuum 

 magnd, deinde tribus mediocribus, cum quatuor parvis,proclivibus, 

 alternantibus ; ad caudam tribus mediocribus: inter stitiis costd quin- 

 quefariam tuberculiferd : aperturd ovali, postice canaliferd, sub- 

 angulatd, margine dentato, undato ; canali aperto : caudd longitu- 

 dine spiram cequante, latd, subrecurvd. 

 Long. 3*45; lat. ex. var. 1*90 poll. 

 Hab. ad mare Pacificum. 



