Original Descriptions of Achatinella. 135 



by Swainson. This has, however, been enlarged by Dr. Pfeiffer 

 to include the numerous late additions of aberrant forms with 

 which Swainson was not acquainted. — Newc. 



Hab. Makawao to Huelo. — Bald. 



2,2,0. Achatinella sebrina Pfeiffer. 



A. zebrina Pfr. P. Zool. Soc. London, 1S55, p, 202. 



A. testa imperforata, dextrorsa, tenuiuscula, laevigata (sublente minu- 

 tissime decussata), nitida, albida, strigis fulgurantibus nigro-castaneis ela- 

 gantissime picta; spira subturrita, apice obtusa, fusca; sutura filomarginata; 

 anfr. 5 modice convexis, ultimo 3-7 longitudinis fere aequante; apertura vix 

 obliqua, truncato oblonga, intus lilacina; plica colum. supera, torta, callosa, 

 vix promineiite; perist. simplice, recto, fusco-limbato. Long. 12 1-2, diam. 

 6 mill. 



Shell imperforate, dextral, quite thin, smooth (under a lens 

 very minutely decussate), shining, whitish, very beautifully col- 

 ored with shining black chestnut stripes; spire subturreted, apex 

 obtuse, brown; suture finely margined; whorls 5, moderately con- 

 vex, the last almost equal to 3-7 of the length; aperture scarcely 

 oblique, truncate-oblong, lilac within; columellar fold high, twist- 

 ed, thickened, hardly prominent; lip simple, erect, edged with 

 brown . 



Hab. Makawao to Huelo. — Bald. 



221^ Achatinella sebra Newcomb. 



A. zebia Newc. Ann. Lye. New York, vi, 1S55, p. 142. 



Shell dextral, conically elongate, shining with microscopic 

 decussating striae; whorls 5 1-2, rounded, narrowly margined 

 above; suture well marked; aperture ovate; lip thin; columella 

 short, abruptly terminating in a large prominent plait; color of 

 epidermis yellowish white, alternating with longitudinal chestnut 

 lines; base of umber color, with a revolving line of the same color 

 above. Long. 11/20, lat. 5/20. 



Hab. East Maui. — Newc. Makawao. 



Dr. Cooke found the type shell to be different from zebrina 

 Pfr. The apex is dark, on the third and fourth whorl are irregu- 

 lar brown and white stripes, a dark narrow band followed by a 

 narrow light band encircles the base; the lower part of the base is 

 dark brown. 



