633 



albente, fasciis angustis purpureo-sanguineis hinc ct hinc ornata.; 

 lunula et area, postica subatropurpureis ; limbo ventrali rubra, 

 intus subcrenulato ; epiderinide subfusca, intus alba subrosco 

 suffusa." 



Shell of an oval form, with fine raised concentric lines ; white, 

 with here and there a concentric narrow line or band of a sangui- 

 neous tint ; red margin, slightly crenulated within. 



Eeal Llejos, Central America. Cuming. 



73. Cytiier/EA albina (pi. cxxxiii. f. 121), Lamarck, Anim. 

 s. vert. CytJt. no. 25. 



Cyth. testa crassa, rotundato-subtrigona, alba, alta, concentrice 

 obscure striata ; latere antico brevi, recto, declivi ; lunula indis- 

 tincta. 



Shell thick, of a somewhat trigonal form, rather rounded, white, 

 with obscure concentric ridges ; the anterior side very short, and 

 leaning straight down towards the ventral margin ; no distinct 

 lunule. 



74. CYTHERiEA trigona (pi. cxxxiii. f. 120). Artemis tri- 

 gona, Reeve, Conch. Icon. 



Cyth. testa, crassa, alta, ventricosa, subtrigona, concentrice cos- 

 tellata, alba ; latere postico declivi, ad marginem ventralem sub- 

 lobato ; latere antico brevi, declivi ; lunula magna, ovali, distincta. 



Shell more trigonal than C. albina, and more distinctly ribbed ; 

 the ventral margin almost emarginated ; the anterior side very 

 short, with a large oval lunule defined by an impressed line. 



75. Cytherjea rostrata (pi. cxxxiii. f. 122), Koch, Phil. 

 Abb. Cyth. 1. 1. f. 3. 



Cyth. testa oblique ovali, pallidissime fulva, concentrice sub- 

 striata; latere postico elongato, ad terminum subquadrato, ob- 

 scure radiatim unisulcato ; latere antico brevissimo, declivi, sub- 

 angulato; lunula distincta. 



Shell obliquely oval, almost white, irregularly and finely striated ; 

 the hinder side elongated, square at the end, with an obscure ra- 

 diating groove ; umbones elevated ; anterior side very short, 

 leaning straight down to the ventral margin, and rather angu- 

 lated ; lunule large, distinct. 



Brazil. 



75*. Cyther/ea acuminata (pi. exxxvi. f. 178), Soiverby,jim. 



Cyth. testa parva, alba, subtrigona, coinpressa, clcvata, conceit 



4 N 



