MUREX. 23 



the hooked angles of the varical fringes. The last vavix is 

 very widely frilled. 



101. bipinnatus, f. 116, Reeve. — Testa angusta, alba, ad 

 aperturam subrosea, dense et rugose spiraliter lirata, M. 

 clavi similis, spira haud tantum producta magis angulata, 

 anfractibus supra medium tumidis, varicibus et plicis tuber- 

 culatis intermediis vix distinctis, anfractu ultimo magis 

 product o et laqueato, fimbria idtima trigona, expansa et 

 laqueata, ad canalem anguste laciniata, infra aperturam 

 coarctata. — This and the preceding species are normally 

 tri varicose shells; but in M. bipinnatus the upper varices are 

 scarcely to be distinguished from the intermediate tubercles, 

 and in the other, while some of the varices retain their 

 hooked projections, others have been either absorbed or 

 undeveloped. 



102. pellucidds, f. 122, Reeve. — Testa trigono-subfusi- 

 formis tenuis minute squamoso-laciniata, alba semipel- 

 lucida, inter varices unituberculata, varicibus fimbriatim 

 alatis, eximie sculptis, ultima late expansa, trilobata; aper- 

 tura angusta, prope labium externum denticulata, spira 

 elongata, anfractibus novenis, angulatis. — A very much more 

 light and slender shell than the M. tripterus. It is some- 

 what intermediate between the two preceding key-shaped 

 species and M. tripterus. 



103. tripterus, f. 121, Born. — Testa ovato-subtrigona, 

 alba medio et ad aperturam subaurantia, spiraliter lirata, 

 pulcherrime squamata, inter varices plicato-unituberculata; 

 varicibus late alatis, fimbriatis, superne rotundis; apertura 

 anguste subovata margine dentato, cauali recto ; spira brevi- 

 ter pyramidata, Anfractibus versus suturam subplanulatis. — 

 Shorter than any of the preceding fimbriated species, and 

 straighter than M. pinnatus. 



104. pinnatus, f. 123, Wood. — Testa eleganter fusiformis 

 alba utrinque acuminata, spiraliter lirata inter liris longitu- 

 dinaliter squamoso-striata, inter varices unituberculata; va- 

 ricibus angulatim alatis, peroblique continuis; ad canalem 

 libere projectis; spira pyramidata, acuminata; canali oblique 

 recurvo. — This comparatively common species is known at 

 a glance from M. tripterus, although resembling it in 

 sculpture, by its elegantly oblique form. 



105. expansus, p. 100, Sowerby. — Testa trapezoidea, 



