CANTHARUS. 165 



C. ^EQUILIRATUS, Carpenter. 



Like G. insignis ( elegans) but much smaller, with tumid 

 whorls, the ribs continuous to the base, crossed by equal-sized 

 lirse, of which five are shown in the spiral whorls ; basal plication 

 of the columella angular. Length, *98 inch. 



Mazatlan ; one dead specimen. 



Carpenter adds to his above description " (tpagodus, Yar.) " 

 sandwiched between the generic 'and specific names, and as syno- 

 nymy " Comp. Buccinum pagodus, Reeve," etc. It is a pity to 

 add to our already overburthened synon} T my by describing shells 

 from single dead specimens, and which moreover, so greatly 

 resemble other species as to suggest identity even to those who 

 describe them as distinct. Carpenter was a great sinner in this 

 respect. 



C. VARIEGATUS, Gray. PI. 74, figs. 298, 299. 



Yariegated with chocolate-brown clouds upon an ashy gray 

 surface, with narrow, crowded, purple-black revolving lines. 



Length, 1'25-1*5 inches. 



Senegal; Cape de Verd Isles ; Hio Janeiro. 



Two prior names have been used : Buc. lineatum, Gmel., which 

 is really Littorina angulifera, and Murex sulcatus, Gmel., founded 

 on Le Tafon, of Adanson, whose figure is too poor for positive 

 identification with this species. 



Purpura viverratoides, Orb. (Yol. II, 168, t. 50, f. 103), placed 

 by me erroneously in the synonymy of P. hsemastoma, is a 

 synonym ; as is also Buc. viverraium, Kiener (fig. 299), errone- 

 ously reported from the Mediterranean lay that author. 



C. DISTORTUS, Gray.. PI. 74, figs. 300, 305. 



White, variegated and longitudinally striped with chestnut- 

 brown ; epidermis brown-olive, short, scabrous, rather persistent; 

 aperture white. Length, 1'25-1*75 inches. 



W. Columbia ; Panama. 



The thickened, ear-like extension of the posterior margin of 

 the aperture of the adult shell gives it a unique and distorted 

 appearance. The spiral whorls are cancellated by longitudinal 

 ribs and revolving ridges : the former become obsolete on the 

 body-whorl and the latter are only present upon its basal portion, 



