THE NAUTILUS. 



Vol. XXXIV APRIL, 1921. No. 4 



A NEW ACHATINELLA FEOM OAHU. 



BY HENRY A. PILSBEY AND C. MONTAGUE COOKE. 



Achatinellae of the typical section are very abundant in some 

 spots on the Waianae Range. It is in fact the only place in 

 Oahu where the collector finally has to stop picking, gorged 

 with shells, while the bushes still hang full of them. One feels 

 like Sindbad in the Valley of Diamonds. Snails of the section 

 Achatinellastrum, however, are the greatest rarities. All that 

 have been found up to 1920 could almost be counted on the 

 fingers. A. lehuiensis Gul., and A. lehuiensis gulickiana P. &C., 

 one specimen of each. A. thaanumi P. & C., two specimens; of 

 A. spaldingi a few hundreds, but all from a very small area. 

 The localities of these are widely scattered along the northern 

 side of the range, just within the forest limit so far as known; 

 each species in a single place. 



Mr. W. H. Meinecke had the good fortune to find another 

 form which we rank as a sub-species of A. lehuiensis, though its 

 locality is remote from Lihue, the localities of A. thaanumi and 

 A. spaldingi lying between them. The new subspecies, how- 

 ever, was taken in some abundance. 



ACHATINELLA LEHUIENSIS MEINICKEI. PI. 4, figs. 6-9. 



The shell differs from A. lehuiensis by the wider, more capa- 

 cious form. In color it is polymorphic. The pattern selected 



