270 AMASTRA, MOLOKAI. 



A. uniplicata, etc., coarse ribs on the first, finer on the sec- 

 ond whorl, which s'hows the carina at the suture, then the 

 riblets shorten, persisting longest below the suture ; the later 

 whorls but slightly convex, marked with faint growth- 

 wrinkles, and subplicate below the suture. Aperture small, 

 violet, livid red or blue- white within. Outer lip hardly thick- 

 ened ; columellar lamella small, median. 



Length 17, diam. 9, aperture 7.8 mm. ; 6% whorls. 



Length 17, diam. 9.2, aperture 8 mm. 



Molokai: Mapulehu (Baldwin) : Halawa and Moakea (Bor- 

 cherding) . 



Some examples have none of the blackish outer cuticle, the 

 whole shell being reddish, with a yellow sutural border, 

 purple-black apex and inconspicuous traces of dull outer 

 cuticle, 'also reddish, on the last whorl. A very dark speci- 

 men in the Cooke collection has some flecks of whitish, hydro- 

 phanous -cuticle on the last whorl, between the black stripes. 



A. simularis var. maura Ancey (pi. 28, fig. 14), is not dis- 

 tinct from the typical form of simularis judging from a co- 

 type which I owe to the courtesy of the Bishop Museum. The 

 original figure is copied, and the description follows : ' ' Shell 

 much larger and more obese than the type (length 17, width 

 9, apert. 7 mm.), with 6 whorls. Color dark red, blackish at 

 the apex; periostracum black, decorticated at some places; 

 columellar margin very dark with a whitish fold ; interior of 

 aperture dark purple-red " (Ancey). 



Amastra simularis var. maura ANCEY, Proc. Malac. Soc., 

 Lond., iii, 1899, p. 270, pi. 13, f. 16. BORCHERDING, Zoologica, 

 p. 114, pi. 10, f. 14 (Halawa, Molokai). 



75a. A. m. roseotincta Sykes. PL 28, figs. 11, 12, 15. 



" Differs from the type in being of a very much lighter 

 shade, the apex, however, being of the usual dusky tint; 

 the shell is also more ovate and shorter and the lamina is 

 slightly more horizontal. Molokai mountains" (Sykes). 



Amastra simularis H'artman var. roseotincta SYKES, Proc. 

 Malac. Soc., Lond., ii, p. 130, October, 1896; Fauna Hawa- 

 iiensis, p. 344, pi. 11, f. 3. ? BORCHERDING, Zoologica, p. 113, 

 pi. 10, f. 13 (Moakea, Molokai). 



