104 AURICULELLA, MOLOKAI. 



to one-third of the length, slightly compressed at the base; 

 aperture a little oblique, truncately oval; parietal lamella 

 thin ; columellar fold obsolete ; lip white, with the right mar- 

 gin shortly expanded, dilated at the columella, spreading. 

 Length 8.6, diam. 3.6 mm.; aperture 3 mm. long, 2 wide" 

 (P/r.). 



The young of this species is imperforate, with an almost 

 straight not dentate columella. The parietal lamella is very 

 small. 



Molokai (Newcomb) ; near Waikolu (Cooke) ; Kealia (Bor- 

 cherding) ; Upper Kaunakakai (Cooke, Pilsbry) ; Kawela 

 (Thaanum). 



Achatinella cerea PFEIFFER, P. Z. S. Lond., 1855, p. 2, pi. 30 r 

 fig. 21. Helicteres petitiana PSE., Journ. de Conchyl., 1868, 

 p. 343. Auriculella petitiana BORCHERDING, 1. c., p. 146, pi. 9, 

 figs. 4, 4&. Auriculella cerea PFR., Mon. Hel. Viv., viii, p. 

 210. ANCEY, Bull. Soc. Mai. France, vi, p. 376. SYKES, 

 Fauna Hawaiiensis, ii, Moll., p. 376. BORCHERDING, Zoolo- 

 gica, part 48 2 , p. 145, figs. 23, 23a, 24, 24a, 



This species as known to us is usually sinistral, in some colo- 

 nies entirely so. It is somewhat related to Auric, brunnea 

 Smith, from the same island, but has a more attenuate spire 

 and is a decidedly thinner shell. The heavy parietal callus 

 and somewhat larger size distinguish it from A. newcombi. 

 As in Auric, crassula Sm., there is as far as I know, no white 

 banded form. 



No island was mentioned in the original description of A. 

 cerea, but Newcomb, who supplied Pfeiffer's type, gave the 

 locality Molokai. No shell exactly agreeing with the original 

 description has been found by modern collectors. The shells 

 we are calling cerea are slightly smaller with the whorls fewer 

 by from one and one-half to one-half ; but they apparently be- 

 long to Pfeiffer's species. The type-figure is copied, pi. 26, 

 fig. 5. 



Specimens from Kawela (pi. 26, figs. 4, 6, 7) are mainly 

 naphthalene yellow, but also varying to cinnamon ; the yellow 

 form sometimes having a peripheral band of chestnut-brown. 

 In one lot there are 14 sinistral and 5 dextral examples. 



