14 



Sral. testd pyramiduli, ventricosd, acumincitd, lavi ; anfrartibus 

 magnis, rotundatis, contiguis, prope suturam elevalis, gradatim 

 crescentibus, suturd profundd ; varicibus niimerosis, simplicibus, 

 versus apicem tenuibus, gradatim crescentibus, in ultimo anfractn 

 crassis, nonnullis dvpUcatis et triplicatis ; aperturd magnd, ovali ; 

 umbilico magno ; colore ititer varices pallidl- fulvo, fasciis binis 

 fuscis in medio anfractūs ultimi purpureo confusis. 

 Hab. Swan River. 



A beautiful pyramidal shell, witli numerous regular varices, which 

 in the upper whorls are thin, but in the lašt whorl are thicker, some 

 of the lašt being doubled. The colour between the varices is dull 

 fawn, -vvith two bands, ^hich in the lašt whorl are blended with purple. 



" Description of new species of Mytilacea, &c.," by Sylvanus 

 Hanley, Esq. 



MoDioLA Metcalfei. Mod. testd subtriangvlari, oblongd, ventricosd, 

 postice albo-ccerulescente, antice purpured, obsolete barbatd, epider- 

 mide flavo-fuscescente indutd; epidermide, prope marginėm dorsa 

 lem, subelongatum, valdi elevatvm, et ad extremitatem posticam 

 brevem, angustam, sursumąue prominentem, nitoris experte ; costd 

 umbonali, prope ad nates purpureas, acutas, obtitse subcarinatd ; 

 angulo dorsali distincto, elevato ; viargine antico subrecto, nunquain 

 incurvato ; extremitate anticd sublinguiformi, rotundatd ; margine 

 ventrali in medio incurvato, postice valde obliquo ; superficie in- 

 ternd anties purpureo tinctd. Long. 1-70; lat. 30 poli. 



įjab. ? Mus. Cuming, Hanley. 



The more prominent characters are the compressed and very di- 

 stinct dorsal angle, the purple beaks, the elevated umbonal ridge, 

 and the absence of all glossiness frora the narrow strip of epidermis 

 \vhich adjoins the ligaraental edge, and from that lunule-shaped por- 

 tion which forms the posterior extreraity and curves upwards to the 

 beaks. I have named it in honour of one of our raost scientific 

 coUectors, W. Metcalfe. Esq., of Lincoln's Inn. 



MoDioLA sTRiATULA. Mod. tcsld clongūto-oblongd, angustd, sub- 



orcuatd, svbcylindraced , epidermide olivaced indvtd ; latere postico 



brevi radiatim costulato, costis paucis, distantibus ; latere antico 



producto, tenuissime radiatim striato, striis ad extremitatem anti- 



cam elevatis, divaricatis ; ared intermedid lavigatu ; margine 



dorsali subrecto, vix elevato, marginis antici convexi longitudinem 



aauante ; margine ventrali incurvato ; angulo dorsali inconspicuo ; 



umbonibus planulatis ; superficie internd purpured ; cardine, ad 



extremitatem ligamenti, crenato. Long. 0-60; lat. 1.40 poli. 



Hab. Batangas, insularum Philippinanim. Mus. Cuming, Hanley. 



Closely similar to plicata in shape, sculpture, and the colour of its 



epidermis ; the rich purple of its interior, its smaller size, and the 



greater delicacy of its markings, at once proclaim its distinctness. 



It is usually rayed anteriorly with narrow interrupted black streaks. 



MoDioLA suBRAMOSA. Mod. tcstd oblongo-ongustatd, subventri- 



