NAT1CA. 37 



N. PATAGONICA, Phil. PL 14, fig. 24 ; PL 21, fig. 12. 



Shell globose, solid, smooth, white, suture profound, umbilicus 



narrow. Length, 1*4 inches. 



Straits of Magellan. 



N. globosa, King (unfigured), from the same locality, appears 

 to agree in description, except that it is said to be thin. Per- 

 haps N. Magellanica, Phil. (fig. 12), may also be referred here. 



N. ATROCYANEA, Phil. PL 14, fig. 21. 



Ovately globose, rather thin, bluish or bluish-white, with a 

 white band at the suture, and white also at the base ; umbilicus 

 narrow ; interior and columella chocolate-colored. 



Length, 1-5 inches. 



Straits of Magellan. 



N. FORTUNEI, Reeve. PL 14, figs. 22, 23 ; PL 9, fig. 72 ; PI. 21, 



fig. 9. 



Conically globose, with elevated spire and well-marked suture, 

 umbilicus narrow, slightly contracted by callus above ; yellowish 

 white to brownish, interior tinged with chocolate. 



Length, 42 mill. 



China. 



Reeve's example was a young one (fig. 22), and resembles 

 Natica tennis, Philippi (not Recluz), so closely (fig. 9), that I 

 am inclined to consider that shell also identical ; although it is 

 said to be as thin as paper, whilst Fortunei is of medium thick- 

 ness. The name tenms was used at an earlier date by Recluz. 

 Perhaps N. gilva, Phil. (fig. 72), is identical ; if so, the name will 

 take precedence. 



N. PALLIDA, Brod. and Sowb. PL 14, figs. 27, 26, 28 ; PL 13, fig. 

 15; PL 9, figs. 76-78. 



Ovately globose, narrowly umbilicated, smooth, dirty white 

 under a yellowish brown thin epidermis. Length, 28 mill 



Arctic Seas circumboreal ; Maine, Massachusetts. 



N. borealis, Gray (fig. 76) ; N. alba, Loven ; N.pusilla, Gould, 

 Forbes and Hanley (not Say) (fig. 78) ; N. Grcenlandica, Beck 

 (fig. 35) ; N. lactea, Loven ; N. bulbom, Reeve (fig. 77), probably 

 N. Beverlii, Leach; N. Gouldii, Phil. (fig. 15); N. suturalis, 

 Gray (fig. 28) ; N. livida, Laskey ; N. caurina, Gould (fig. 26), 

 are synonyms. 



