PARTULA, MOOREA. 205 



' ' 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 vexillum. On a second visit, in 1875, I took over 2000 ex- 

 amples, all gathered on the tvestern side of the stream, and 

 was surprised to find many sinistral forms among them 

 [pi. 28, fig. 9]. At the same time I found about a dozen 

 specimens, all sinistral, in a large semicircular valley on the 

 opposite side of the island. They were probably stragglers 

 from Vaianai. 



"It is noteworthy that no reversed Partulce were found in 

 any other part of the island except on the western side of the 

 stream in Vaianai, and the above-mentioned stragglers taken 

 on the opposite coast. The same side of the stream is also 

 the home of the sinistral P. mooreana." 



20. P. TJSNIATA (Morch). PI. 28, figs. 15, 16; pi. 29; figs. 

 8, 12, 13. 



Shell rimate, conic, pellucid, transversely irregularly pli- 

 cate, longitudinally very closely waved-striate, under a lurid 

 cuticle, the last whorl encircled with two distant, white, brown- 

 bordered bands; suture appressed, whorls 5, a little convex, 

 the last about as long as the spire, obsoletely angular above 

 and below ; fold of the columella 'compressed, twisted. Peris- 

 tome white, broadly expanded, reflexed. Length 18, diam. 

 8, aperture inside 8x4% mm. (Mch.). 



Society Is. : Moorea. 



Bulimus (Partulus} t&niatus MOERCH, Catalogus Oonchyl- 

 liorum quae reliquit C. P. Kierulf, etc., 1850, p. 29, pi. 1, fig. 

 5. Partula tcuniata PFEIFFER, Mon. Hel., iii, p. 451. CAR- 

 PENTER, Proe. Zool. Soc., 1864, p. 675. HARTMAN, Obs. Gen. 

 Part. Bull. Mus. Comp. Zool., ix, p. 188 (part). GARRETT, 

 Journ. A. N. S. Phila. ix, 1884, p. 72. Partula striolata 

 PEASE, Amer. Jour. Conch., 1866, p. 197 ; 1867, p. 81, pi. 1, 

 fig. 4; Proc. Zool. Soc., 1871, p. 473. PFEIFFER, Mon. Hel. 

 viii, p. 203. Partula simulans PEASE, Amer. Jour. Conch., 



