OP CONCHOLOGT. 211 



4. Achatinella humilis, Newcomb. 



Ann. New York Lyceum Nat. Hist., Sept., 1855. 

 Plate 13, fig. 4. 



Description. — Shell elongately conical, longitudinally rudely 

 striate ; whorls 7, rounded above, flattened centrally, last one 

 obscurely carinated superiorly; suture deep, simple; apex 

 acute ; aperture subrotund ; lip acute, slightly thickened with- 

 in ; columella flattened with a thick plait. Color of shell pale 

 salmon, covered with a densely black epidermis ; columella 

 and a deep margin of the outer lip within dark brown ; inte- 

 rior of aperture bluish-white. 



Long. |$ ; lat. 2 7 5 in. 



Habitat. — Kalai, Molokai. On the ground, under low 

 bushes. 



Remarks. — We have very little variety to note in this spe- 

 cies, which was obtained in considerable numbers at the 

 locality mentioned above on only one occasion. Subsequent 

 researches of the same ground failed in obtaining specimens. 



5. Achatinella pusilla, Newcomb. 



Ann. N. Y. Lye, Sept., 1855. 



Achatinella pulla, Newc. Zoolog. Proc, London, Nov. 

 1855, page 209. 



Plate 13, fig. 5. 



Description. — Shell dextral, conically ovate; apex acute; 

 whorls 6, plano-convex ; suture above but lightly impressed, 

 below strongly marked ; lip simple ; columella short, with a 

 twisted plait ; epidermis light brown, often encircled by nar- 

 row white bands. 



Long. \% ; lat. 2 4 5 inch, var major. 

 20? 20 mmui. 



Habitat. — Ranai. 



Remarks. — The double name of pusilla and pulla was in 

 consequence of Dr. Pfeiffer, of Cassel, publishing in my name 

 several species which I had forwarded Mr. Cuming, in Zool. 

 Proc, without knowing that they were already described by 

 me in the Annals of the N. Y. Lyceum. The specimens were 

 probably forwarded under the name given by Dr. Pfeiffer. 



6. Achatinella petricola, Newcomb. 



Annals Lye. Nat. Hist., New York, Sept., 1855. 



Achatinella umbilicata, Pfr. Zool. Proc, London, Nov., 

 1855. 



Plate 13, fig. 6. 



