M D I L A. 



Species 39. (Mus. Cuming.) 



MouioLA opiFEX. Mod. teM oblongo-cuneiformi, gib- 

 hosa, radiaiim sulcosd, latere postico brevmimo, antico 

 angulaio-aitentmio ; caslaneo-corned, niteiUe, versus 

 exlremitateni anticam rude setigerd. 

 The .\etificer Modiola. Shell oblong wedge-shaped, 

 gibbous, radiately grooved, posterior side very short, 

 anterior angularly attenuated ; chestnut-homy, shin- 

 ing, rudely bristled towards the anterior extremity. 

 Say, Journ. Acad. Nat. Sci. Philadelphia, vol. iv. p. 369. 

 Hab. Eio Janeiro. 



Unlike most Modiolis, this species is attenuated ante- 

 riorly, broadly gibbous, and roughly clothed at the extre- 

 mity with an epidermis of bristly liairs. 



Species 40. (Mus. Cuming.) 



Modiola vexillum. Mod. testa subtrigono-flabelUformi, 

 tend, pellucidd, latere postico subgibboso, antico angu- 

 lato-expanso ; jhvescente, olivaceo-viridi, nitide undu- 

 latini pictd. 



The flag Modiola. Shell somewhat triangularly fan- 

 shaped, thin, transparent, posterior side rather gib- 

 bous, anterior ansularly expanded; yellowish, neatly 

 painted with waves of olive-green. 



Vohella picta, Duuker (not M. picta, Lamarck). 



Hab. Australia. 



Of thin, transparent substance, prettily variegated with 



concentric dark-green zigzag waves. 



Species U. (Mus. Cuming.) 



Modiola Mageixanica. Mod. testa oblongo-lrapezoided, 

 postice gibbosd, antice subexpansd, nndique radiatim 

 sulcata; fuhescente. 

 The Magellan Modiola. Shell oblong-trapezoid, pos- 

 teriorly gibbous, anteriorly rather expanded, radi- 

 ately grooved throughout ; light fulvous. 

 Vohella Magellanica, Duuker MS. in Mus. Cuming. 

 Hab. Straits of Magellan. 



Of a light fulvous colour, rayed throughout with close- 

 set longitudinal grooves. 



Species 42. (Mus. Cuming.) 

 Modiola perfeagilis. Mod. testa elongatd, lenui, iiii- 

 dique mitmtissime decussatim striata, striis posticii 

 longitudinalibus incisis, extremitate posticd parvn, ro- 

 tundatd, anticd obligud ; pellucido-albd, nitente, vires- 

 cente tinctd. 

 The very fragile Modiola. Shell elongated, thin, 

 very minutely decussately striated, posterior longitu- 

 dinal, stria? engraved, posterior end small, rounded, 

 anterior rather oblique; transparent-white, shining, 

 tinged with pale-green. 

 Volsella perfragilis, Dunker, Pro. Zool. Soc. 1850, p. 



362. 

 Hab. Moluccas. 



In substance this shell is very thin, transparent-white, 

 tinged with sea-green, and on examination with a lens, the 

 surface will be found to be minutely decussately sculp- 

 tured, the longitudinal striae being irapressly engraved. 



Species 43. (Mus. Cuming.) 



Modiola scbramosa. Mod. testa subtrigono-oblongd. 

 ieniii, sem.ipellucidd, concentrice tenuistriatd, radiatim 

 ramoso-liratd, liris obtusis, subjlexuosis, latere postico 

 parvo, gibboso, antico trigono-flabelliformi ; lutescenle. 

 pitrpureo-rnfo tinctd. 



The branched Modiola. Shell somewhat triangularly 

 oblong, thin, semitransparent, concentrically finely 

 striated, radiately branch-ridged, ridges somewhat 

 flexuous, posterior side small, gibbous, anterior tri- 

 angularly fan-shaped ; yellowish, stained with purple- 

 red. 



Hanley, Pro. Zool. Soc. 1844, p. 14. 



Hab. Island of Mindanao, Philippines ; Cuming. 



A somewhat fragile shell, neatly rayed with obtuse 



ridges, which branch off in a flexuous manner, particularly 



in the anterior direction. 



Species 44. (Mus. Cuming.) 



Modiola subpukpurea. Mod. testa elongatd, stibar- 

 cuatd, tenuicidd, gibbosd, Icevigatd, latere postico ob- 

 tuse rotmdato, antico compresse producto ; nitente- 

 olivaced, subpurpured. 



The purplish Modiola. Shell elongated, somewhat 



October, 18.57. 



