CASSIS.— Plate X. 



Linnaeus ; care must, however, be taken not to confound 

 it with the Cmm plicata of Martini, which is the C. cru- 

 mena of Lamarcic, and without doubt a variety of C. testi- 

 culm. The plicated sculptwe of this species is constant, 

 so also is its singularly compressed growth, and dark 

 brown blotches Ijehind the varices. 



Species 28. (Fig. a. Mus. Saul. 

 Fig. b. Mus. Cuming.) 

 Cassis achatina. Cms. testa ovatd, vmtr'wosd, spird 

 brni, anfractibm evaricom, lavibm, columella mx 

 rugatd, basi trwieatd, lahro tenue rejiexo, basin verms 

 leoiter denticulato ; cinered ant carulescente, ru/o 

 purpureove lonffitudinaliier Jiammatd et arcuatim. arti- 

 culatdi columella laded aid rufescente, labru fusco- 

 iiigricante viaculatu. 



The agate Helmet. Shell ovate, ventricose, spire 

 short, whorls destitute of varices, smooth, columella 

 scarcely wrinkled, truncated at the base, lip thinly 

 reflected, slightly denticulated towards the base ; 

 ash or bluish colour, longitudinally flamed and 

 arcuately articulated with red or purple-brown ; 

 colimiella cream-colour or reddish, lip spotted with 

 browiush-black. 



Lamarck, Anim. sans vert. (Deshayes' edit.) vol. x. p. 33. 



Hab. Algoa Bay ; Hennah. 



A well-known species, not of very common occurrence, 

 mainly distinguished by its richly variegated style of 

 painting. Lamarck cites New Holland as its place of 

 habitation, but Mr. Cuming's specimens were collected in 

 Algoa Bay, Cape of Good Hope, by the Eev. Mr. Hennah. 



