280 CASSIDARIA. 



Geneni ; 1>. nodostim, Dillw.; B. strigosum, Gmelin ; Pyrula pr<>- 

 vincialis, Martin (fig. 11), is an abnormal form. The opcrculuin 

 differs from that of Cassis in not having radiating ridges. 



C. CORONADOI, Crosse. PL <), figs. 12, 13. 



Globose oval, rather thin, with rather close spiral riblets, two 

 or three of which are a little more prominent than the others, 

 and distantly tuberculate ; yellowish brown, lip, columellar callus 

 and interior whitish. Length, 4 inches. 



Matanzas, Cuba. 



A single specimen only is known. Mr. Crosse has described 

 it as a Cassis, although recognizing its resemblance to C. echi- 

 nophora. 



C. DESIIAYESII, Duval. PL 9, fig. 6. 



Ovate ventricose, strongly shouldered, longitudinally plicate, 

 spirally sulcate, tuberculate on the shoulder ; violaceous brown, 

 with chestnut lines and spots ; spire acute, mucronate ; aperture 

 white, lip dentate within, columella rugose above and below. 



Length, 32 mill. 



W. Coast of Africa. 



The unfigured C. acuta. Gray, may be the same species. 



C. TYRRHENA, Lam. PL 10, fig. 14. 



Pear-shaped, thin, .regularly corded with ridges with nearly 

 equal interstices, sometimes an obscure shoulder is defined by ;i 

 tuberculated ridge, yellowish brown ; lip obsoletely plicate, and 

 with the columellar callus, white. Length, 3-5'5 inches. 



Mediterranean Sea, Atlantic Coast of France and Sjifin. 



Is supposed by some conchologists to be a variety only of 

 C. echinophora. It is Buccinum ochroleucum, Gmel. 



Subgenus SCONSIA, Gray, 1847. 



C. STRIATA, Lam. PL 10, figs. 15, 16. 



Closely spirally thread-striate, decussated into nodules above 

 and on the spire by rugose growth-lines, lip and columella both 

 strongly plicate throughout ; whitish or brownish, showing a 

 few light chestnut quadrangular spots on the upper part of the 

 columellar callus. Length, 2-2*5 inches. West. /W/f?x. 



C. Isevigata, Sowb., and C. sublaevigata, Guppy, tiro fossil 

 representatives of this shell. 



