18 PARTULINA, SECTION PERDICELLA. 



Var. minuscula Pfeiffer. PL 5, fig. 6. Shell subim perforate, 

 sinistral, ovate-turrite, rather thin, under a lens minutely decus- 

 sate, scarcely shining, brown-whitish; spire turrite-conic, the 

 apex slightly obtuse; suture simple. Whorls 5, very slightly 

 convex, the intermediate ones variegated with brown, last whorl 

 a little shorter than the spire, encircled with a brown band and 

 with a brown area on the rotund base. Columella scarcelv 



V 



plicate, semioval; peristome simple, acute, the columellar mar- 

 gin dilated above, reflexed. Length 10, diam. 5 mm. ; aper- 

 ture 4-| mm. long, 2f wide (Pfr. ). 



Molokai Mountains at 4000 ft. (Perkins). Sandwich Islands 

 (Frick in Cuming coll., type loc. ). 



Achatinella minuscula PFR., Malak. BL, iv, 1857, p. 231; P. 

 Z. S., 1858, p. 22, pi. 40, f. 10; Monographia, iv, 562. Per- 

 dicella m., PEASE, P. Z. S., 1869, p. 648. SYKES, Fauna 

 Hawaiiensis, p. 330. Cf. BORCHERDING, Zoologica, p. 76. 



Pfeiffer' s figure, which we copy, shows a color-pattern like 

 that of some immature specimens of Helena. Borcherding con- 

 siders it a synonym of that species, an opinion which I think 

 well-founded. It seems to be a wider shell than the dextral 

 P. zebrina Pfr., which it resembles closely in coloration. Mr. 

 Baldwin reported minuscula from Lahaina, Maui, evidently con- 

 fusing it with the quite different P. kufmsi. 



2. P. ORNATA (Newcomb). PI. 4, figs. 8, 9, 10. 



" Shell sinistral, acutely pyramidal, shining; whorls 6, plano- 

 convex, margined above; suture well-impressed; aperture sub- 

 quadrate in adult, subovate in immature shells; lip slightly 

 thickened at the edge; columella broad and flattened; surface 

 of shell covered with alternating undulations or zigzag markings 

 of white and black arranged longitudinally, with a subcentral 

 transverse black band, sometimes margined with a white one 

 below on the last whorl. Length 10, width 4 twentieths of an 

 in ch ' ( Newcomb ) . 



East Maui: in a deep ravine back of Lahaina (Newcomb, 

 type loc.). West Maui: Mt. Helu, 4000 ft. (W. F. Kaae). 



Achatinella ornata NEWC. , P. Z. S., 1853, p. 149, pi. 24, f. 

 55. Pfr., Malak. Bl. 1854, p. 118; Monogr. iv, p. 561. 



