OPEAS, POLYNESIA. 183 



hawaiense, 0. javanicum, 0. opella, and 0. goodalli, the lat- 

 ter being found in Manoa valley, Oahu. 



Probably not one of these is truly indigenous, though 

 O. oparanum may have been introduced with the Hawaiian 

 race. The rest were probably brought within the period of 

 commerce, together with Zonitoides minuscula, PMlomycus, 

 and Agriolimax. 



In general, 0. oparanum has a more eastern, 0. gracile 

 a more western distribution in the Pacific. 



91. 0. OPARANUM (Pfeiffer). PI. 22, figs. 1, 2, 3, 12; pi. 24, 

 fig. 39. 



Shell subimperforate, subulate, longitudinally distinctly 

 striate, thin, waxy-hyaline; spire subulate, rather acute; 

 whorls 9, slightly convex, the last about two-sevenths the 

 total length; columella slightly arcuate. Aperture oblong- 

 oval; peristome simple, unexpanded, columellar margin very 

 narrowly reflexed, adnate. Length 11, diam. 3, aperture 3 

 mm. long, 1.5 wide (Pfr.). 



Opara (= Rapa) Island at the roots of plants south of the 

 Paumotu group (Cuming coll.). Also Polynesia generally. 



Bulimus oparanus PFR., P. Z. S. 1846, p. 34 (published in 

 May, 1846) ; Monogr. ii, p. 158. REEVE, Conch. Icon, v, pi. 

 87, f. 646. Opeas o. 9 SMITH, Ann. & Mag. N. H. xx, 1897, p. 

 414 (Kapaur, New Guinea). Opeas oparica Pfr., SYKES, 

 Proc. Malac. Soc. v, p. 198. (New Hebrides on Efate, Vanua 

 Lava and Valua.) 



Stenogyra tuckeri Pfr., GARRETT, Journ. Acad. Nat. Sci. 

 Phila. viii, p. 392 ; ix, p. 43 : P. Z. S. 1887, p. 185 ; Bull. Soc. 

 Mai. France 1887, p. 20; Proc. A. N. S. Phila. 1887, p. 131 

 (synonymy; range in Polynesia). Opeas tuckeri Pfr., 

 MLLDFF., Journ. of Malac. vii, 1900, p. 113 (Caroline Is.). 



Stenogyra upolensis Mouss., Journ. de Conch. 1865, p. 175 

 (Upolu, Samoa), with var. minor (Nukuiona, Uvea). Buli- 

 mus u., PFR., Monogr. vi, p. 100. 



Stenogyra novemgyrata Mouss., Journ. de Conchyl. 1870, 

 p. 126 (Oneata). Bulimus n., PFR. Monogr. viii, p. 138. 



