PARTULINA, SECTION BALDWINIA. 107 



Length 26.3, diam. 16, aperture 14 mm. (near Mana). 



Length 23, diam. 15.2, aperture 12 mm. (near Mana). 



Length 23, diam. 13.8, aperture 11.2 mm. (near 'Mana). 



Length 27.7, diam. 17.5 mm. (Mana, Bishop Mus., no. 

 22357). 



Var. phcuostoma Ancey. ' ' Shell glossy, pale coffee colored, 

 the apex white, posterior part tessellated, marked with close 

 spiral lines and rough growth-striae. Aperture and colu- 

 mella brown, throat glittering, brown, the edge a little paler. 

 Length 23, diam. 14.5, oblique length of aperture 11.5 mm. 

 Hawaii, Thaanum ' (Ancey). The type of phceostoma, now 

 in coll. Bishop Museum, shows no racial characters whatever 

 to differentiate it from confusa, and I do not think it a valid 

 variety or race. 



Var. procera Ancey : ' was never denned in any way, but 

 one may infer that Mr. Ancey 's intention was to name the 

 large fossil form of the Palihoukapapa bed. 



Hon. L. A. Thurston collected a series of confusa on the 

 Waimea side of the Kohala Mts., including some shells darker 

 than any from localities farther east. 



47. P. HORNERI (Baldwin). PI. 17, figs. 1 to 5. 



" Shell sinistral, minutely perforated, thin, globose with a 

 short acutely conical spire, apex acute ; surface shining, stri- 

 ated with fine incremental lines, and under a lens exhibiting 

 very close and delicate decussating spiral striae; embryonic 

 whorls faintly cross-lined. Color dull white, encircled at the 

 periphery with a faint brown zone which is continued on the 

 suture, also with a very small patch of same color around the 

 umbilicus. Whorls 6, the upper five slightly convex, the last 

 very much inflated, forming the greater part of the shell; 

 suture distinctly impressed. Aperture oblique, sub-rotund, 

 very large, white within, distinctly showing the external 

 peripheral band ; peristome margined with light brown, rather 

 thin, very slightly thickened within, expanded, basal and 

 columellar margins narrowly reflexed, extremities slightly 

 converging and united by a thin callus; columella light 

 brown, very slightly developed, plain and smooth. Length 

 24, diam. 18 mm. 



