OF CONCHOLOGY. 19Y 



My collection comprises tlic most, if not all, tlie land species 

 of Oualan, and we are confident our species does not inhabit 

 that island, and that lineata is found nowhere else but Oualan. 



7. Partula gracilis, Pse. 



Description. — T. gracilis, oblonga, tenui, turrita, translucida, 

 dextrorsa, albida, transversim creberrim^ striata; anfr. 5, 

 piano-con vexis ; apertura oblonga, edentata, | longitudinis 

 testre sequans, basi producta; labro tenui, cequaliter et oblique 

 expanso. 



Dimensions. — Long. 16, diam. 7 milh 



Shell gracile, oblong, turreted, thin, translucent, dextral, 

 finely and closely striated transversely; whorls 5, planely con- 

 vex ; aperture oblong, edentate, one-half the length of the shell, 

 produced at base ; lip thin, evenly and obliquely expanded. 

 Color whitish. 



Observations. — The above species has been determined by 

 Mr. Cuming to be synonjanous with P. amahilis, Rve., credited 

 to the island of Anaa, one of the Paumotu's. It is evidently 

 a mistake ; we forbear, therefore, any comparison. It is the 

 most delicate and graceful species in our collection, and with- 

 out variety in shape or color.* We may as well remark here 

 in this connection, that no species of Partulse inhabit Anaa, 

 nor, so far as we can learn, any of the Atolls. The land shells 

 on Anaa are Helicina 1 sp., Omphalotroiyis 1 sp., Truncatella 

 1 sp., Tornatellina 2 sp., Bulimulus junceus, Plecotrema mordax, 

 Laimadonta striata, Melampus, 5 sp. Two Helices and one 

 species of Nanina have also been described from that locality, 

 but after a thorough search of two months and a half, none 

 could be found dead or alive. 



8. Partula striolata, Pse. 



Description. — T, abbreviato-ovata, solidiuscula, angustu um- 

 bilicata, transversim striis tenuis creberrime notata ; anfr. 4 J, 

 plano-convexis, sutura plerumque marginata; apertura ovalis, 

 edentata, parum obliqua ; labro angustc, sequaliter, et sub- 

 rotunde incrassato; columella supcrne subnodosc callosa; pal- 

 lide cornea, aut castaueo-cornea, aut castanea, longitudinaliter 

 tenui strigata. 



Var. Earissime fasceis castaneis tribus cingulata. 



* Mr. Reeve remarks that amahilis is peculiar, in wanting the transverse 

 striae common to near all the species of this genus. Our species above is 

 more distinctly striated than any species we have from the Tahitian group 

 of islands. 



