276 AMASTRA, MOLOKAI. 



nition as a Molokaian species is at present hypothetical. 

 Boreherding has figured a form from Kawela which closely 

 resembles the East Mauian rustica Gulick. It seems to differ 

 from Adams's description of modesta in color and shape of 

 the spire. 



78a. A. M. DIMISSA n. subsp. PI. 40, figs. 11, 12. 



Some specimens received from Gulick as A. modesta are 

 larger, the last two whorls cream-white, earlier whorls fleshy- 

 brown; the last whorl is covered with -a thin olive-brown 

 cuticle with pale streaks. The dull surface is unlike A. simu- 

 laris. These shells have no zigzag lineolation, but the cuticle 

 is slightly mottled in places. The lip has a narrow white 

 thickening within; the vertical, blue columella bears a very 

 oblique fold. Embryonic whorls costate and carinate. 



Fig. 11. Length 17, diam. 8.9, aperture 8 mm. ; G 1 /^ whorls. 



Fig. 12. Length 16.5, diam. 8, aperture 7.1 mm. 



Molokai: Cotypes 92683 and 10209, A. N. S. P., from the 

 Gulick collection. Temporarily grouped under modesta. It 

 is very unlike atroflava. 



79. A. SUBOBSCURA Hyatt & Pilsbry, n. sip. PI. 42, fig. 6. 



The shell is minutely perforate, oblong-conic, rather thin, 

 slightly shining. Outlines of the spire are nearly straight; 

 embryonic whorls reddish-brown; after a smooth half- whorl 

 there is a coarsely costate whorl, carinated close above the 

 suture; the next whorl is finely and very closely costulate, 

 and subangular next the lower suture. Following whorls con- 

 vex, sculptured with growth-wrinkles, subplicate just beloAV 

 the suture, pale fleshy-gray, partly covered with a very thin, 

 smooth olivaceous cuticle, darkest on the last half-whorl, 

 wanting in front of the aperture. Aperture pinkish-white, 

 the outer lip not thickened. Parietal callus whitish, rather 

 thick. Length 11.9, diam. 6, aperture 5.1 mm. ; 6 whorls. 



Molokai : Ulapue. Type to be deposited in Bishop Museum, 

 collected by D. Thaanum. 



Well distinguished by its plain cuticle, without mottling 

 or markings of any kind. A. amicta Smith differs by the 



