50 TERRESTRIAL MOLLUSCA INHABITING SOCIETY ISLANDS. 
The following valley, named Punaavia, is the metropolis of the beautiful P. nodosa, 
which also exhibits three bands. Far above the restricted range of the latter, where 
the valley turns towards the head of Fautana, the home of the typical Otaheitana, I 
took a few examples of a Purtula, similar to, but larger than erassu. The next valley 
is the habitat of lignaria. 
Perhaps it may, by some, be suggested that I ought to have been more conservative 
in my treatment of the Otaheitana group, which, to say the least, is a very perplexing 
one to separate into species or even well-marked varieties. However, I think P. 
affinis, rubescens, crassa, sinistrorsa, and perhaps lignaria, may rank as varieties which 
intergrade with the typical Ofaheitana. But those who believe that species, 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 value than P. hyalina, filosa and nodosa. 
P. LINEATA, Lesson. Plate III, fig. 83. 
Partula lineata, Lesson, Voy. Coquille, p. 324, Pl. VII, figs. 8,9. Reeve, Conch. Icon., 
Pl. II, fig. 7. Pfeiffer, Mon. Hel., iii, p. 449. Carpenter, Proc. Zool. Soc., 1864, p. 675. 
Schmeltz, Cat. Mus. Godeff., iv, p. 72. 
Partulus torosus, Beck, Ind. Moll., p. 57. 
Partulus lineatus, Albers, Die Hel., p. 187. 
Partula strigosa, Pfeiffer, Proc. Zool. Soc., 1856, p. 384; Malak. Blatt., 1856, p. 244; Mon. 
Hel., iv, p. 509. 
Partula alternata, Pease, MS. Coll. Pease, 1863. 
Partula vexillum, Pease, Amer. Jour. Conch., 1866, p. 198; 1867, p. 81, Pl. I, fig. 8; Proce. 
Zool. Soe., 1871, p. 4738. Pfeiffer, Mon. Hel., viii, p. 196. 
Partula nodosa, Carpenter (not of Pfeiffer), Proe. Zool. Soc., 1864, p. 675 (= alternata). 
Pease, Proc. Zool. Soc., 1871, p. 473 (part). Schmeltz, Cat. Mus. Godeff., v, p. 92 (part). 
Gloyne, Quar. Jour, Conch., i, p. 337. 
Partula stenostoma, Hartman (not of Pfeiffer), Cat. Part., p. 10. 
Partula suturalis, Hartman (Pfeiffer ?), 1. e. 
This beautiful arboreal species is found in great profusion in Vaianai valley, on 
the southeast coast of Moorea, where it oceurs in company with P. Mooreana and P. 
elongata. It also exists in considerable numbers in a small valley about two miles to 
the westward, associated with P. teeniata and elongata. 
I first discovered this species in 1861, and obtained several hundred specimens, 
all collected on the eastern side of the stream that flows through the valley of Vaianai. 
They were all dextral, and were so described by Pease, under the name of vewxillum. 
On a second visit, in 1875, I took over 2000 examples, «// gathered on the western side 
of the stream, and was surprised to find many sinistral forms among them. At the same 
time I found about a dozen specimens, «// sinistral, in a large semicireular valley on 
the opposite side of the island. They were probably stragglers from Vaianai. 
It is noteworthy that no reversed Partula were found in any other part of the 
island except on the western side of the stream in Vaianai, and the above-mentioned 
