633 



albentc, fasciis augustis purpureo-sanguiueis hinc et liinc oriiatu; 

 lunula et area postica subatropurpureis ; liinbo vcntrali rubro, 

 intus subcrenulato ; cpidermide subfusca, intus alba subroseo 

 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. Cytheilea ALBiNA (pi. cxxxiii. f. 121), Za»«arCi^, Anim. 

 s. vert. C^th. 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. Cytheu^a 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, decKvi ; 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. Cythek^a eostrata (pi. cxxxiii. f. 123), Koch, Phil. 

 Abb. Ci/th. 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, decHvi, sub- 

 angulato; lunula distincta. 



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

 the liinder 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. cxxxvi. f. 178), Sowerhy,jun. 



Cyth. testa parva, alba, subtrigona, compressa, elevata, conccn 



4 N 



