38 NATICA. 



N. SORDIDA, Phil. PL 12, figs. 99, 100. 



Solid, striate loDgitudinally, reddish broTvn or orauge-brown, 

 or yellowish white, white at the base ; umbilicus narrow, open, 

 spirally striate, usually reddish brown as well as the callus ; 

 interior of aperture whitish or tinged with brown. 



Length. 1*1 inches. 



England to 2Icditerranean^ rare. 



With this must be united N. BroccMana, Phil., N. fusca, of 

 "Weinkauff. not Blainville — the latter being a somewhat doubtful 

 species. ^^. Isevida^ Laske}-. and X. jylicatida, Reeve (fig. 100). 



N. COMPACTA, Jeffreys. PI. U, fig. 31. 



Globular, thick, opaque, somewhat glossy, with a few micro- 

 scopical spiral strije ; light yellowish brown ; suture wide, slightly 

 channeled ; inner lip thickened, closing the umbilicus, but not by 

 a pad. Length, 9 mill. 



Atlantic, 0. (" Porcupine " and " Lightning " Expeditions). 



The young have the umbilicus open. 



X. SUBPLICATA, Jeffreys. PI. 14, fig, 32. 



Globular, rather thick, opaque, glossj', slightly wrinkled — 

 striate at the suture ; ivorj' -white ; suture rather deep ; umbilicus 

 narrow. Length, 10 mill. 



Bay of Biscay, Of Cape Verd Is. (370-1192 fms.). 



N. ANGULATA, Jeffreys. PI. 14, fig. 33. 



This is an embr^-o only, and should not have been described. 

 Length, 1'25 mill. 



Atlantic, Mediterranean (" Porcupine'' Exped.). 



N. TEXUis, Recluz. PI. 14, fig. 25. 



Thin, dirty white, smooth, spire elevated, suture well impressed, 

 columellar callus thin, reducing the umbilicus to a rimate open- 

 ing. Length, 1 inch. 



Valparaiso. 



y. IMMACULATA, TottCU. PI. 12, fig. 7. 



Conically ovate, the extremities rather pointed, milk-white, 

 under a thin greenish j-ellow epidermis ; umbilicus narrow ; 

 inner lip with white callus. Length, 8 mill. 



Xew England, Xova Scotia, etc., to Greenland. 



With this I unite X. nana, Mdller, a species described from 

 Greenland. 



