'2 16 PROCEEDINGS OF THE ACADEMY OF [1895. 



acute, thickened within, slightly expanded, white, the dark lines of 

 the exterior marked on the inner edge ; columella purplish brown, 

 terminating in a strong, oblique, tortuous fold. 



Length, 18 ; diam. , 10 mm. 



Habitat, Nuuanu Valley, Oahu. 



Animal, when extended in motion, longer than the shell. Mantle 

 brown, lighter on the outer edge. Foot above and below light 

 brown; posterior portion tapering. Tentacles long and slender; these, 

 with the head above, slate color. 



A great variety of transition forms occur between this species and 

 A. belhda Smith, which is found on the neighboring mountain 

 ridges of Nuuanu Valley, and is a much larger shell. The animals 

 of the two extremes are specifically different. The mantle of the 

 latter is black, whereas that of the former is brown, and that of the 

 intermediate forms varies from black to brown. 

 Achatinella Juddii, n. sp. PI. X, figs. 3, 4. 



Shell dextral, imperforate, solid, pyramidally conical, apex ob- 

 tuse ; surface shining, covered with very delicate incremental lines ; 

 the nuclear whorls smooth. Color light gray, shading into light 

 chestnut on the apical whorls, the gray more intense under the 

 cuticle ; with two black lines, one below and one at the periphery, 

 the latter faint and continued on the soire ; between the lines a white 

 hand which revolves on the suture to the very tip of the apex. 

 Whorls 6, margined above, slightly convex ; suture lightly im- 

 pressed. Aperture oblique, oval, white, the light gray of the ex- 

 terior surface exhibiting a darker shade within; peristome acute, 

 slightly thickened within, a little expanded, columellar margin very 

 slightly reflected, white, the coloring of the exterior dark lines reap- 

 pearing rather more intense on the inner edge ; columella white, 

 terminating in a moderately developed flexuous fold. 



Length, 15; diam., 9' mm. 



Habitat, Halawa, Island of Oahu. 



No opportunity for an examination of the animal has yet occurred. 

 The shell is typically very distinct from any other known species. The 

 light chestnut band on the apical whorls is a characteristic and in- 

 variable feature. The basal portion of the shell sometimes has a 

 yellowish hue. In immature shells the colors are more intense. 



Named in honor of Hon. A. F. Judd, Chief Justice of the Re- 

 public of Hawaii, by whose son the shell was discovered. 



