54 PARTULINA, MAUI. 



"This species passes into A. gouldiiRewc. Much handling 

 gradually removes the epidermis from the shell, leaving the 

 surface more or less polished' (Gulick'). 



26a. P. gouldi perfecta n. var. PL 11, figs. 18 to 21. 



The bands are very dark chestnut on a cream-white ground. 

 The lip has a stronger callous rib within and is slightly flesh- 

 tinted, with faintly traced bands. The columellar fold is 

 twisted, very strongly projecting, subhorizontal; axis perforate 

 or closed. Color-pattern various, as figured. 



Length 20, diam. 12, aperture 9.8 mm.; 6f whorls. 



Length 19.5, diam. 11 mm. 



Wailuku (D. D. Baldwin). A small form or race from the 

 same valley (pi. 11, figs. 20, 21) measures, length 17, diam. 10 

 mm. ; 6J whorls. 



27. P. APTYCHA (Pfeiffer). PL 18, fig. 5. 



Shell imperf orate, dextral, oblong-conic, rather thin, striatu- 

 late, a little shining; white, ornamented with dotted chestnut 

 girdles. Spire long-conic, the apex rather obtuse, suture nearly 

 simple. Whorls 6J, a little convex, the last nearly equal to 

 two-fifths the total length, rotund at base. Aperture oblique, 

 truncate-oval, milk-white within. Columellar fold obsolete, 

 very slightly twisted. Peristome simple, very lightly thick- 

 ened within, the right margin unexpanded, columellar margin 

 narrow, adnate. Length 21-J, diam. 10 mm., aperture 9^ x 

 5iy mm. 



fA 



Sandwich Islands (Frick in Cuming coll.). 



AchatineUa aptycha PFR., P. Z. S., March, 1855, p. 1, pi. 30, 

 f. 1; Monographia, iv, 562; Nomenclator Hel. Viv., 1881, p. 

 315 (Perdicella) . 



A "lost' species, unknown to Hawaiian collectors. It 

 seems as near a young gouldii or baileyana as anything. Sykes 

 remarks ' ' probably from Maui. ' 



Series of P. tappaniana. 



28. P. TAPPANIANA (C. B. Adams). PL 12, figs. 1, 2, 3. 

 "Shell reversed, elongate ovate-conic; pure white, with one 



