MUREX.— Plate XXX. 



eximqiie nived, rosea pallidissime tinctd; aperturd 

 mibampld. 



The northern Murex. Shell somewhat elongately fu- 

 siform, slender, slightly transparent, transversely ob- 

 soletely ridged ; seven-varicose, varices simple, lamel- 

 liferous ; snowy white within and without, very palely 

 tinged with pink ; apertiu'e rather large. 



IIeeve, Pro. Zool. Soc., 1845. 



Hab. Iceland. 



An elegant scmitransparent laminiferous shell partaking 

 very much of the generic character of Fumis. 



Species 146. (Mus. Cuming.) 



Murex crassilabuum. Mur. testa ovatd, spird drevi, 

 nctttd, transversini fortiter costatd, costis perpmtcis, 



grandibits ; mnltifariam varicosd, varicibus simplidbus, 

 laminiferis ; intus extusqite nived; labro peculiariler 

 incrassato. 



The thick-lip Murex. SheU ovate, spire short, acute, 

 transversely strongly ribbed, ribs very few in num- 

 ber, large ; many-varicose, varices simple, laminifer- 

 ous, snowy white within and without ; lip peculiarly 

 thickened. 



Gray, MSS. British Museum. 



Purpura crassilabruiii, Sowerby. 



Hab. Valparaiso (found in crevices of rocks at low water); 

 Cluming. 



Mr. Sowerby has questioned the propriety of placing 

 this shell in the genus Murex, but I am inclined to think 

 Mr. Gray is correct in so doing. 



