FISSURELLA. 151 



paratively smooth species, conspicuously painted with thirteen pur- 

 ple lake rays, (five.") 



Cape Horn. 



F. bella RVE., Conch. Icon. f. 21, 1849. SOWB. Thes. Conch, iii, 

 p. 185, f. 25. 



The elevated form, notably narrowed in front, is characteristic. 



F. PULCHRA Sowerby. PI. 33, fig. 50. 



Shell ovate-oblong, depressed, smooth ; perforation oblong, more 

 than twice as long' as wide, and a little less than one-seventh the 

 length of the shell, the sides each with two little denticles. 



The form is long-ovate, narrower in front, much depressed. Color 

 light purplish-ashen, obscurely rayed with purplish-red, and pro- 

 fusely speckled around the orifice with red dots. Inside white with a 

 border (2 to 3 mill wide) of dark purplish-brown. Muscle-scar dis- 

 tinct. Length 54, breadth 35, alt. 7 mill. 



Valparaiso, Chili. 



F. pulchra SOWB. P. Z. S. 1834, p. 124 ; Conchol. Illust. f. 24. 

 REEVE, Couch. Icon. f. 9. SOWERBY, Thes. Conch, iii, p. 184, f. 31. 



In general form and flatness this species is like latemarginata ; 

 but it is not radiately striated. The sprinkling of red dots around the 

 middle part is also characteristic. This is a character usually 

 shown by young specimens of many rayed species, but in this one it 

 extends over a larger tract and is, therefore, retained in the adult. 



F. BRIDGESII Reeve. PL 30, fig. 3. 



Shell ovate, slightly attenuated anteriorly, rather thick, depressed, 

 concentrically very finely striated ; orifice oblong, rather wide, sides 

 excavated in the middle ; concentrically banded with brownish- 

 purple and ashy-black, obscurely white rayed ; basal margin very 

 broad, purple. (Rve.) 



This fine species approaches the F. latemarginata in general aspect 

 but will be found to differ materially on comparison. It is of 

 thicker growth, not radiately striated ; the orifice differs in being 

 larger and excavated at the sides, and the painting is of a lighter 

 purple-ash. (jFfoe.) 



Qumtero, Chili. 



F. Bridgesii RVE., Conch. Icon. f. 16, 1849. SOWB. Thes., iii, p. 

 184, f. 21, 22, 34. 



Compare also F. limbata. 



