1895.] NATURAL SCIENCES OF PHILADELPHIA. 217 



Aohatinella Ernestina, n. sp. PI. X, figs. 5, 6. 



Shell sinistral, subperforate, moderately solid, ovately conical; 

 apex subacute ; surface shining, obliquely striated with delicate 

 growth lines, under a strong lens exhibiting numerous, very close, 

 and minute decussating stride ; apical whorls smooth, scarcely decus- 

 sated. Color yellow, lighter above ; variously striped with trans- 

 verse, dark chestnut bands, the more constant being one bordering 

 the suture, one at the periphery, spiral above, and one encircling the 

 base. Whorls 6, narrowly margined above, somewhat convex : 

 suture moderately impressed. Aperture oblique, oval, faintly ex- 

 hibiting the dark bands of the exterior; peristome acute, somewliat 

 thickened within, slightly expanded, white, the coloi'ing of the ex- 

 terior bands appearing on the inner edge ; columella white, termi- 

 nating in a prominent, oblique, tortuous fold. 



Length, 21 ; diam. , 12 mm. 



Habitat, Nuuanu Valley, Islaud of Oahu. 



The animal, when extended in motion, as long as the shell. Man- 

 tle light brown, sprinkled with black and margined on the outer edge 

 with an interrupted reddish-yellow line. Superior portion of foot 

 light brown, thickly studded with small slate spots ; under portion 

 of foot light brown with a slate tinge. Tentacles dark slate. 



This species is found near the mountain ridge separating the 

 habitats of J., castanea Rve. and A. fuscolineata Smith ; and in 

 general appearance and characters it is intermediate between these 

 species. It is much smaller than the former and rather larger than 

 the latter, and differs from them both in the arrangement of colors. 

 Transition forms between it and both of them are numerous. An item 

 of specific value is the difference in the exterior appearance and color 

 of the animals. 



Section BULIMELLA Pfeiffer. 

 Achatinella luteostoma, n. sp. PI. X, figs. 7, 8. 



Shell sinistral, imperforate, solid, ovate, spire convexly conical, 

 apex obtuse ; surface shining, marked with fine growth lines, under 

 a strong lens seen to be decussated by close, extremely minute 

 spiral striae, apical whorls smooth. Color white, with a reddish- 

 yellow lip. Whorls bh, margined above, slightly convex. Suture 

 moderately impressed. 



Aperture oblique, sinuately oval, white within. Lip obtuse, 



