50 
TP]RKESTIIIAL MOLLUSCA 
INHAIJITING SOCIETY ISLANDS. 
The following > alley, named Punaavia, ie the metropolis ol the ^ 
which also cxhiht three bands. Far above the restricted miige of the latter where 
the valley turns towards the head of Fautana, the home ol the typ.eal tWmdono I 
took a fel e.xamples of a Mvh,, similar to, but larger than 1 he next valley 
is the habitat of Kgnaria. 
Perhaps it may, by some, be suggested that I ouglit to have been more conservative 
in my treatment of the OtaheU<ma group, which, to say the least, is a very iM-rplexing 
one to separate into species or even well-marked varieties. However, I think H 
iiffmis, rnhescms, crassa, sinistrorsa, and perhaps Hgnaria, may rank as varieties which 
intergrade with the typical Otaheitmia. But those who believe that siiecies, like 
genera, have no sharply defined boundaries, but are connected to others by transitial 
forms, will in all probability consider them distinct, but closely allied species, but of 
less Aalue than P. Jiy<iKn<i, Jilosa and nodosa. 
P. i.iNEATA, Ircsson. Plate III, fig. 83. 
Partula lineata, Lesson, Voy. Coquille, p. 324, PI. VII, figs. 8, 9. Peeve, Conch. Icon., 
PI. II, fig. 7. Pfeiffer, Mon. Hel., iii, p. 449. Carpenter, Proc. Zool. Soc., I8C4, p. fi75. 
Schineltz, Cat. Miis. Godeff, iv, p. 72. 
Parlulus torosvs, Beck, Ind. Moll., p. 57. 
Partulus linealus^ Albers, Die Hel., p. 187. 
Partula strigosa, Pfeiffer, Proc. Zool. Soc., 185fi, p. 384; M.alak. Blatt., 185fi, p. 244 ; .Mon. 
Hel., iv, p. 509. 
Partula alternata, Pease, MS. Coll. Pease, 1863. 
Partula vexillum, Pease, Amer. Jour. Conch., 18GG, p. 198; 18G7, p. 81, PI. 1, fig. 8; Proc. 
Zool. Soc., 1871, p. 473. Pfeiffer, Mon. Hel., viii, p. 196. 
Partula nodosa, Carpenter (not of Pfeifler), Proc. Zool. Soc., 1864, p. 675 (=- alternata). 
Pease, Proc. Zool. Soc., 1871,'p. 473 (part). Schmeltz, Cat. Mas. Godeff., v, p. 92 (part). 
Gloyne, (^uar. Jour. Conch., i, p. 337. 
Partula stenostoma, Hartman (not of Pfeifler), Cat. Part., p. 10. 
Partula suturalis, Hartman (Pfeiffer?), 1. c. • 
lids beautiful arboreal species is found in great profusion in \'aianai valley, on 
the southeast coast of Moorea. where it occurs in company with P. Mooreana and P. 
elcmgatn. It also exists in considerable numbers in a small valley about ttvo miles to 
the AvestAvard, associated Avith J\ Urmata and elongata. 
I first discovered this species in 1861, and obtained several hundred siK^eimens, 
all collected on the eastern .side of the .stream that flows through the vallev of Vaianai 
I hey Avere dextral, and Avere so described by Pea.se, under the name'of veHlhnn. 
Ol. a siToml visit, m 18 1 . 5 , 1 took over 2000 examples, all gathered on the a-atern side 
of the siren..,, and was surprised to find many sinistral forms among them. At the same 
he‘oLl°s".' “i f M T »" somieircuhir valley on 
.he opposite side of the island. They were probably stragglers from Vaianai. 
IS noteworthy that no reversed Partutm were found in any other iiiirt of the 
island exee,,t on the western .side of the stream in Vaianai, and the aboveonentioned 
