MUEEX— Supp. Plate I. 



M. Gubba possesses two specimens of tliis very inter- 

 esting new species, to which I have the pleasure of at- 

 taching his name. 



Species 194. (Mus. Cuming.) 

 McEEX UNICORNIS. Mur. testa subfusiformi-oblongd, 

 a-assd, oblique trigomi, tramversim, obscure costatd, 

 tuberciilo magno inter varices, varicibm iucrassatis, 

 obtusis, ultimo intus denticulato, dente unico conspicuo 

 erecto elongate, canali brevissimo, clauso ; alba, castaneo 

 tinetd. 



The unicorn Murex. Shell somewhat fusiformly oblong, 

 thick, obliquely triangular, transversely obscurely 

 ribbed, with a large tubercle between the varices, 

 varices thickened, obtuse, last whorl denticulated 

 within, one tooth conspicuous, erect, elongated, canal 

 very short, closed ; white, stained with chestnut. 



Hab. ? 



This approaches very near to the M. monoceros, but is of 

 a different form and of more solid growth. 



