80 SCALARIA. 



Section Acirsa, Morch, 1857. 



S. GRANULOSA, Quoy. PL 16, fig. 11. 



Rather thick, fulvous, with a white band, or whitish, very min- 

 utely nodose, Avith vestiges of ribs, gathered and crenulated at the 

 suture ; whorls about 9, a little sloping. Length, 1-1*25 in. 



Swan River, Australia. 



Very closely allied to S. costulata, Mighels and Adams, and may 

 be a variety ; it has about the same nearness to that species that S. 

 Australe has to S. borealis. 



S. COSTULATA, Mighels and Adams. PI. 16, figs. 10, 12, 18. 



Whitish or greyish flilvous, thick ; whorls 8, slopingly, slightly 

 convex, with a spiral rib below, upper portion more or less distinctly 

 longitudinally ribbed, gradually fading until the body whorl is- 

 smooth or nearly so. Length, 18-22 mill. 



Gi-eenland to Cape Cod, Mass.. 



Mighels describes a young specimen, in which the ribs are more 

 apparent. The synonymy includes S. borealis. Beck, 1839, proba- 

 bly (not described), S. Eschrichti (Holb.), Moller (fig. 12), Turritella- 

 Hibernica, Waller, and S. undulata, Sowb. (fig. 18). 



S. SUBDECUSSATA, Cantraine. PI. 16, fig. 19. 



Whorls about 11, rather flattened, the upper ones with longitu- 

 dinal ribs, which soon become obsolete, distantly, lightly, spirally 

 striated, a slight spiral rib on the base of the body Avhorl. 



Length, 23 mill. 



Mediterranean. . 



Like S. costulata, but narrower. The synonyms are S. Phili2)pii, 

 Aradas, and probably S. striata, A. Ad., said to come from the 

 Philippines. 

 S. GRACILIS, Verrill. PI. 16, fig. 20. 



Whorls about 6, well rounded, with deep sutures, and rather 

 prominent, close, rounded ribs, fading out on the middle of the body 



whorl. Length, 5 mill. 



Martha's Vineyard. 

 Probably not adult. 



S. PYRRHiAS, AVatson. PI. 18, fig. 75. 



Shell thin, slopingly shouldered, white ; whorls about 8, rapidly 

 enlarging, with several distant spiral threads just below the shoulder- 

 angle, and about 11, oblique, procumbent lamellre. Length, 5 mill. 



Off Culebra IsL West Indies, 390 //?is.- 



