62 LAMELLARIA. 



L. PATAC40NICA, Smith. PL 26, ligs, 6-8. 



Shell large, very fragile, transparent hyaline, with a slight 

 milky cloudiness, showing very fine growth-striae ; whorls 3^, 

 suture deep. Diam., 1 inch. Mantle dirty yellow, Avith lines 

 and blotches of light vand3^ke brown, the under surface around 



the foot marked with light-colored stria. 



Patagonia. 

 Is possibly identical with L. Antarctica^ Couth. 



Section Chelynotus, Swains, 



L. ToNGANA, Quoy and Gaimard. PI. 26, fig. 11 ; PI. 27, figs. 

 14-16, 18. 



Shell shining white, pellucid, margin brown. Length, 28 mill. 



Animal with a thick mantle, tuberculate, the tubercles large, 



subhexagoiial, black, anteriorly produced and bifid ; foot narrow, 



brownish. Length, 85 mill. 



Tonga Tabou. 



This and several following species belong to a section charac- 

 terized by the produced anterior portion of the mantle and 

 narrower foot. Verj' probably L. Berghi is a s3-nonym of the 

 present species, or of the next one ; Coriocella nigra of Blain- 

 ville (fig. 16) is also perhaps identical, but cannot be made out 

 Avith certaint3\ L. Ctivieri, Bergh (fig. 18), appears to be an 

 individual contracted in alcohol. 



L. Mauritiana, Bergh. PI. 27, fig. 17. 



Shell elevated, j-ellowish white, pellucid, smooth, with distinct 



incremental strise. Length, 1 inch. 



Mauritius. 

 L. Berghi, Desh. PI. 26, figs. 9, 10. 



White, pellucid, striate ; open below, shoAving the Avhorls. 



Length, 16 mill. 



3fau7'itius. 



In the specimens before me the margin of the aperture is 



narrowl}' tinted with brown. 



L. iSABELLiNA, Bergh. PI. 26, fig. 19. 



Undescribed. The figure represents an OA-al, flat, Avhite- 

 margined species, the back light purplish with white spots. 



Length, 10 mill. 



f Philippines. 

 Shell not figured. 



