STROM BUS. 109 



consider a doubtful species. Prof. Morch, however, considers it 

 a good species and says: "In 1869 I obtained from Mr. Lan- 

 dauer at Frankfurt, a specimen from a French collection marked 

 ' S. invrmis, Florides,' exactly corresponding to Lister's figure. 

 It is the only one I recollect to have seen." Mai. Blatt., 

 xxiv, 17 

 S. PUGILTS, Linn. PL 2, figs. 13-15 ; PL 1, figs. 9, 10. 



Spire and lower part of body-whorl spirally striate, the spire- 

 whorls and shoulder of body-whorl sharply spinose ; deep 

 orange-brown, covered by a thin epidermis, with an indistinct 

 median lighter band ; aperture and wide columellar callus 

 orange or carnelian-red, or sometimes purple towards the base 

 of the lip. Length, 8 inches. 



So. Carolina West Indies, Brazil. 



There are varieties with the spines horizontally (fig. 14) and 

 vertically (fig. 15) compressed. 



Var. ALATUS, Gmelin. Figs. 9, 10. 



Spire nodulous, not spinose, body-whorl also without spines, 

 the shoulder indistinctly nodulous or smooth ; color yellowish 

 white and dark chestnut, marbled or disposed in zigzags, some- 

 times light-banded in the middle; epidermis thin, aperture and 

 columella deep orange to carnelian, more or less tinged with 

 dark purple. 



The above describes a typical example of this variety, and its 

 characters are usually sufficiently permanent for its distinction, 

 even as a species ; but intermediates between it and S. pugilis 

 so completely connect the two, that those who have had the best 

 opportunities for studying them, consider them synonymous. 

 S. pyrulatus, Lam. (fig. 10), is identical with S. alatus. S. dubius, 

 Sowb. (fig. 16) is a young shell. 



S. GRACILIOR, Sowb. PL 2, fig. IT. 



Pale yellowish or orange, with a thin epidermis, sometimes 

 faintly white-banded in the middle; aperture whitish, or pink- 

 white, the lip often margined with orange. Length, 3 inches. 



Panama to Mazntlan ; La Paz, L. California. 



Lighter in color, thinner, smoother (scarcely striate on the 

 spire), with closer*, smaller, shorter spines than S. pugilis ; yet 

 eudently derived from the same parent stock. 



