TERllESTRIAL MOLLUSCA INHABITING SOCIETY ISLANDS. 
73 
Mooreana, eJnngata and lineaia^ var. strigosa, only. But after passing Oahinni, the 
home of the latter \ ariety, we again find tceniata, but nearly as variable as the eastern 
Opunohu shells, and mixed with the form known as striolata, Pse., with which it inter- 
grades. Here I found several unmistakable hybrids between strigosa and tcsniuta. 
All the valleys between this latter location and the one nearest to Opunohu are 
inhabited by the typical form striolata, which scarcely differs from micltola, except in 
being smoother and more variegated with stripes. In a large valley adjacent to 
Opunohu, we find these shells by thousands ; they differ in being beautifully striped 
like strigosa. Here, again, it insensibly graduates into the typical tcenioia. Whether 
the inosculation takes place through hybrids or not is a difficult question to decide In 
looking over a large collection from the eastern part of Opunohu, I find some of the 
small forms are not dissimilar to the typical striolata, which has suggested the pro- 
priety of following Dr. Hartman in consolidating the three forms. 
The typical tceuiata varies from abbreviate-ovate to elongaie-ovate, more or less 
solid, scarcely shining, smooth or wrinkled with incremental strke, and the spiral 
incised lines arc very fine, and crowded on all the whorls. The spire is more or less 
produced half the length of the shell, sometimes shorter or a trifle longer. W horls 
moderately convex, the last one convex or convexly rounded, frequently compressed m 
the back and right side, which gives it a faint biangular appearance. Tlie subvertical 
aperture, which is variable in size and shape, varies from subovate to oblong. 1 he 
peristome is more or less expanded, sometimes considerably so, moderately thick, 
slanting and lahiated within. Columellar lip more or less tortuous, abruptly receding 
above, which gives it a nodulous appearance. About one m a hundred exhibits the 
parietal tooth. The following measurements will illustrate the variability m shape:— 
Length 17, diam. 9, aperture (including lip) mill. 
Length 17, diam. 8, aperture (including lip) 8 mill. 
I.ength 13, diam. 7, aperture (including lip) 8 mill. 
The color is also variable : white, straw-yellow, lemon-yellow, light orange, corneous, 
fiUvous, various shades of brown, sometimes with darker strigations, and frequently 
snirallv banded. The most common style of fasoiation consists of from one to four 
narrow, more or less broken, fulvous or Mvous-brown bauds on the borly-whorl 
Fulvotis-brown examples, with two or three pale bunds, are not so common. Ihe last 
appears to be Mbreh’s type, which he incorrectly assigns to the Vih Islands. 
Pease's stnotata and nnefeoto exhibit the same coloration as the typical 
hut are sometimes of a deeper brown, and the former is more conspicuously stnga^. 
Dr lartmau, on the authority of Pfeiffer, quotes P.peraffims, P^., which he ados 
.0 rsynonymyLf — I do not 
neference to i. i" fjo.frMarquesas Islands as the habitat 
:r h,aT:;“ :s, Ind Dc. cox mention having received it from the Solomon 
