NEWCOMBIA. 11 



opaque, longitudinally plicatulate, spirally sublirate and very 

 lightly granulated, cinnamon colored. Spire long, somewhat 

 rectilinear, the apex rather acute; suture nearly simple. Whorls 

 6, slightly convex, the upper marbled with brown and white, 

 last whorl about two-fifths the total length, tapering and chest- 

 nut-colored below the middle. Columella simple, receding. 

 Aperture slightly oblique, semioval, subangular at base; peris- 

 tome simple, unexpanded, acute. Length 19, diam. 5, aperture 

 7 x 3 mm. Sandwich Is., Frick in Cuming coll. (Pfr.). 



Molokai : Mapulehu (Baldwin, Thaanum) ; Makakupaia 

 (Perkins, Meyer); Honomuni, Moanui, Kupeke and Ahaino 

 (Thaanum). 



Achatinella cinnamomea PFR., Malak. BL, iv, 1857, p. 230; 

 Monographia, iv, 559; P. Z. S., 1858, p. 22. Newcombia 

 cinnamomea Pfr., BALDWIN, Catalogue, p. 8. SYKES, Fauna 

 Hawaiiensis, p. 331. Newcombia cumingii Newc. (in part), 

 BORCHERDING, Zoologica, p. 99, pi. 9, f. 7 (Makakupaia). 



This form resembles N. cumingi closely in shape and micro- 

 scopic sculpture, but it differs by the weakness of the spiral 

 cords, which vary from weak to almost effaced. As this differ- 

 ential feature seems to hold in considerable series of both forms, 

 I think it best to retain the name cinnamomea for the Molokai 

 race, although the relationship to the Mauaian N. cumingi is so 

 close that perhaps cinnamomea might better be ranked as a sub- 

 species. 



On account of the weakness of the coarse sculpture, the 

 minute, wavy, crenulated or granular striation (pi. 3, fig. 7) is 

 more distinct in this race than in Mauian cumingi. The axis is 

 often perforate. Immature shells are more strongly lirate than 

 the adults, and often could not be distinguished from N. cumingi. 

 N. cinnamomea is therefore to be viewed as a derivative of cumingi. 



The fully formed embryo of 3J whorls, length 4.7 mm., has 

 a very heavily calloused columellar fold, but no lamella (pi. 1, 

 fig. 12). Younger embryos have the callus weaker, hardl}' 1 

 noticeable in those of two whorls (pi. 1, fig. 9). All are per- 

 forate. 



The types were supplied by Frick who gave no locality other 

 than the " Sandwich Islands.' In specimens collected by New- 



