THE COOK'S OR HARVEY ISLANDS. 383 



lines on the upper parts are frequently so crowded as to give that portion an uni- 

 form cinereous color. The largest examples measure 9 J mill, in diameter. 



Examples sent to the Godeffroy Museum were referred to radians, Pfr. After 

 a careful comparison with PfeifFer's description and Reeve's figure, as copied in 

 Dr. Cox's Australian Land Shells, I do not hesitate to consider venosa as distinct 

 from radians. 



M. DiscoRDiCE, Garrett. 



Shell small, minutely perforate, depressly globose, smooth, fragile, thin, pel- 

 lucid, very brilliant, lightly striate, pale corneous; spire depressly conoid, convex; 

 apex obtuse ; suture slightly impressed ; whorls 4|— 5, convex, slowly and regu- 

 larly increasing, the last angulated on the periphery, not deflected in front, convex 

 beneath; perforation punctiform ; aperture subvertical, angulate lunate; peristome 

 thin, straight, margins remote ; columella slightly expanded. 



Height 2|, major diameter 4 mill. 



The animal is pale cinereous, with dusky head and tentacles. Foot oblong, 

 rather narrow, compressed, in length equal to the major diameter of the shell. 



A very fragile species found in great abundance beneath rotten wood and 

 among decaying leaves. It is diffused throughout the group, and ranges in all 

 parts of the Society Islands. I took a few examples at the Marquesas, which 

 differed none from Cook's Island and Tahitian specimens. 



According to Pfeiffer's description of subtilis, with which this has hitherto been 

 confounded, this certainly cannot be that species. Our shell is one-third smaller, 

 angulate, and the whorls are not margined with a red line. 



Pfeiffer's description of subtilis is as follows: — 



" T. imperforata, depressa, tenerrima, nitida, pallide cornea ; spira vix exserta ; 

 confr. 4|-5 planiusculi, sensim accrescentes, ultimus basi paulo convexior ; sutura 

 interdum rufo-marginata ; apertura transverse lunaris ; perist. simplex, acutum. 

 Diam. maj. 6, min. 5i, alt. Z^ mill." (Pfeiffer.) 



M. CONULA, Pease. 



Melix conula, Pease, Proc. Zool. Soc, 1861, p. 248. Pfeiffer, Mon Hel., v. p. 62; vii. p. 15. 



JSelicopsis conula, Pease, Proc. Zool. Soc, 1811, p. 475. 



Nanina Tongana, "Mousson" (not of Quoy), Schraeltz, Cat. Mus. Godeff., y. p. 91. 



Nearly two hundred examples of this species were taken from the foliage of a 

 large shrub, near the sea-shore at Rarotonga. Though carefully searched for, I 

 failed to detect it in any other part of the island, Rarotonga specimens, with the 

 exception of being a little larger, differed none from Society Island shells. Mr. 



