AMASTRA, MOLOKAI. 265 



Length 16, diam. 9.3, aperture 7.9 mm. ; 6 whorls. 



Length 15.1, diam. 10.1, aperture 8.9 mm.; 5% whorls. 



Length 15, diam. 10, aperture 8.9 mm. 



Molokai : Waikalu. 



Amastra seminuda BALDWIN, Nautilus xix, April, 1906, p. 

 137. 



Smaller than the veTy closely related A. pullata, more 

 rudely sculptured, the last whorl light-colored above, dark 

 below the middle, the division of color generally abrupt. The 

 description and figures are from the type lot in the Baldwin 

 collection. 



73. A. UNIPLICATA Hartman. PI. 28, figs. 17, 18, 21, 22; 

 pi. 49, fig. 12. 



" Shell dextral, solid, elongate oval, occasionally cylindri- 

 cal, whorls 7, slightly rounded, the last somewhat inflated, 

 suture impressed, longitudinally striate, aperture sub-oval, 

 white; a single white elongate twisted plica within; outer lip 

 acute, color of the shell a pale ochre-yellow, concealed by a 

 black epidermis. Length 20, diam. 9, aperture 28, diam. 4 

 Trim, 



" This shell is from a different island from A. biplicata 

 Newc., which it resembles; the latter possesses more coarse 

 longitudinal striae, and has a double plica within, and the 

 aperture is red, while uniplicata has a single plica, and the 

 aperture is white " (Hartman}. 



Molokai (Hartman from Pease coll.) : Kamalo (Baldwin, 

 Meyer). 



Amastra uniplicata HARTMAN, Pro-c. A. N. S., Phila., 1888, 

 p. 50, pi. 1, f. 7. BALDWIN, Catalogue, 1893, p. 10. BOR- 

 CHERDING, Zoologica, xix, p. 112, pi. 10, f. 11. 



Typical specimens, received from Hartman, are figured, pi. 

 28, figs. 21, 22. The shell is pale yellow under a thin ; partly 

 deciduous cuticle, which is black or dark chestnut on the last 

 whorl, and yellow, with or without dark markings, on the 

 penultimate whorl. The embryonic whorls are flat, flesh- 

 tinted; initial half- whorl is smooth, next whorl strongly cos- 

 tate with a basal carina. following whorl much more finely 



