PARTULINA, MAUI. 41 



. PFR., Monogr. iv, 527. SYKES, Fauna Hawaiiensis 

 p. 312. THWING, Reprint Orig. Descript. Achat. pi. 2, f. 10. - 



This very distinct species is more closely related to P. divightii 

 concomitans of Molokai than to any other existing form. In the 

 series of 70 specimens in the collection of the Academy only one 

 is sinistral. There is a good deal of variation in the extent of 

 light markings, but the subperipheral band seems rather con- 

 stant, being absent in only one example. The dark color varies 

 from chestnut to chocolate, and is more or less streaked with 

 lighter and darker. One specimen (pi. 18, fig. 2) has the 

 whole post-embryonic shell banded as in P. tessellata a notable 

 advance in pattern, foreshadowed by a few others having several 

 basal bands. 



The embryonic shell, 5 mm. long, has the first two whorls 

 light fleshy brown, whitish below the suture; some broad, indis- 

 tinct darker clouds then appear, changing on the last whorl to 

 zigzag axial stripes of dark brown and cream-white ground. 

 The axis is perforate, columella a little convex (pi. 18, figs. 3, 4). 



SPECIES OF MAUI. 



The numerous species and varieties fall into three series: that 

 of P. marmorata, stout, ovate forms with streaked or striped 

 pattern; series of P. splendida, thinner shells with profuse spiral 

 bands and lines; and the series of P. tappaniana, mainly light 

 colored, rather narrow forms, uniform, or with spiral bands on 

 a white ground. 



Series of P. marmorata. 

 17. P. KAAEANA Baldwin. PL 10, figs. 5, 6, 7. 



" Shell sinistral, subperf orated, solid, globose with a conical 

 spire, apex subacute; surface rather lusterless, covered with 

 rather coarse wavy growth lines, and under a lens exhibiting 

 close and delicate decussating spiral lines; nuclear whorls faintly 

 decussated. Color ashy brown, with a light brown band just 

 below the periphery which enters the aperture; whole surface 

 covered with minute longitudinal white flecks or streaks; apex 

 tessellated white and brown. Whorls 6, not margined above, 

 flatly convex; suture lightly impressed. Aperture a little 



