THE COOK'S OR HAEVEY ISLANDS. 407 



This minute species is exceedingly abundant on all the islands, where it occurs 

 on the ground in forests. 



The only variation is in color, which, though usually pale corneous, is fre- 

 quently reddish-brown, and sometimes varied with a sutural and basal reddish band. 



H. FLAVESCENS, Pease. 



Helicina Pacifica, Pease, Amer. Jour. Conch., 1865, p. 291 ; 1866, p. 82, PL 5, fig. T. 



Helicina Jlavescens, Pease, Amer. Jour. Conch., 1861, p. 228, PI. 15, fig. 25; Proc. Zool. Soc, 



1871, pp. 467, 476. Schmeltz, Cat. Mus. Godeff., v., p. 99. Pfeiffer, Mon. Pneum., Suppl. 3, 



p. 260. 

 Helicina pisum, Hombr. & Jacq. (not of Philippi), Voy. Pol. Sud., v. p. 44, PI. 11, figs. 18-22; 



Pfeiffer, Mon. Pneum., Suppl. 2, p. 185. 

 Helicina straminea^ Pease, MS. Schmeltz, Cat. Mus. Godeff., v. p. 99. 

 Helicina Tahitensis, Pease, Proc. Zool. Soc, 1871, pp. 466, 476. Schmeltz, Cat. Mus. Godeff., v. 



p. 98. Pfeiffer, Mon. Pneum., Suppl. 3, p. 256. 



This, like the preceding species, is distributed throughout the group, and is 

 strictly confined to the low-lands near the sea-shore, where they occur in pro- 

 digious numbers on stony ground. 



The locality "Oulan Isl'd," as given in the "American Journal of Conchology," 

 is erroneous. 



Pease's Tahitensis, which we add to the synonymy of this species, is also 

 difi'used throughout the Society Islands, and, like Jlavescens, delights in stony 

 grounds in close proximity to the sea. 



Both have the exceedingly delicate fugacious strise, but this is much more 

 rarely seen on Tahitian examples. It is not by any means a constant character in 

 Jlavescens, and the clean smooth shells cannot be distinguished from Tahitensis 

 by a single constant feature. Both vary in the outline of the periphery, which is 

 either rounded or more or less angulate, but never carinate. 



H. Brazieri, Pease, which inhabits Savage Island, is smaller, more variable in 

 color, frequently banded, and is slightly carinate. 



GENUS CHONDRELLA, Pease. 



Since the publication of my paper on the Purutu land shells, I have again 

 restudied with great care the animals of several examples of this genus, and the 

 results fully confirm my previous statement in regard to the total absence of ten- 

 tacles or eye-" lumps." 



In every other respect the animal differs none from Assiminea, except in having 

 a shorter muzzle. 



The genus is confined to Southeastern Polynesia. 



