106 
TEKKKSTKIAL 
MOLLUSCA INHABITIiNG SOCIETY ISLANDS. 
II. Raiatknhis, Garrett. Plate III, figs. 69, G9 a, (>9 6. ^ i ^ f 1 f 
Shell depressly conoid, rather thin, slightly shining, consinciiously striate, liiteous 
or whitish horn-color, marbled and spotted with opaque white; spire depressly 
conoid; suture linearly impressed; whorls four and a half, convex, regularly and 
rapidly increasing, not deflected in front, last one depressed, rounded on the per- 
iphery, flatly convex beneath ; aperture oblique, wide, semioval ; peristome straight, 
slightly thickened; columella short and receding; basal callus thin, nearly concolored. 
Major diani. 5, height 3 mill. 
Ilah. — Raiatea. 
A few examples were found amongst decaying vegetation, on the west side of 
Raiatea, but not detected in any other part of the group. 
It is closely allied to rustica in the form of the shell, and the shape of the peris- 
tome is quite similar in the two species. It may, how'ever, be at once distinguished 
by its larger size, lighter texture, smoother and more shining surface and different 
color, as well as the more receding columeUa. 
Genus CHONDRELLA, Pease. 
C. PABVA, Pease. Plate III, fig. 41. 
Cyclostoma parvum, Pease, Proc. Zool. Soc., 1864, p. 674. 
Chondrella parva, Pea.8e, Proc. Zool. Soc., 1871, pp. 465,476. Pfeiffer, Mon. Pneum., iv, 
p. 294. 
Not uncommon, and ranges throughout the group. I also took a few .specimens 
at the Marquesas Islands. They occur amongst dry dead leaves, under stones and 
dead wood. 
About the size and .shape of Afisiminea nitida, with rounded w'horls, pale horn- 
color, soTiietimes ruddy corneous, and varies in size and length of the spire. 
C. iNSULAiiis, Crosse. 
llydrocena insularis, Crosse, Jour, de Conch., 1865, p. 223, PI. VI, fig. 7. 
Omphalotropis insularis, Pease, Jour, de Conch., 1869, p. 154. 
Atropis insularis, Pease, Proc. Zool. Soc., 1871, p. 476. 
Rp.alia insularis, Pfeiffer, Mon. Pneum., iv, p. 212. 
'fhis species, which I first discovered at the Gambier Islands, where M. Crosse’s 
examples were collected, is also common to Tahiti and Moorea. In size it is inter- 
mediate between parva and striata, but is of a more ruddy color, and, like the former, 
IS smooth. 
C. STRIATA, Pease. Plate III, fig. 40. 
‘’7!; P- «’• Pfeiffer, Mon. Pne,™.. iv. p. 29i. 
p Ts! >’■ Sel- riPle-, 1881. 
Hydrocena striata, Schmeltz, Cat. Mus. Godeff., v, p. 100. 
Hydrocena subinsularis, Mousson MS ' 
He en, alien si^e, ruddy color and spiral stri* will readily distinguish it from O. parva. 
