INDEX AND SYNONYMY. 423 



PAGE. 



Obscura (Rissoa), Phil. Enum. Moll. Sic. ii, p. 127, t. 23, f. 



10, 1844. = R. parva, DaCosta 332 



Obtusa (Rissoa abyssicola, var.), Jeffreys. Ann. & Mag., p. 



13, 1870. = R. subsoluta, Aradas 3(>* 



Obtusa (Rissoa), Cantraine. Bull. Acad. Bruxelles, 1842, pt. 



11, p. 348. = R. soluta, Phil 356 



Obtusispira (Rissoa), Seg. Mss. = R. turgida, Jeffr. . . 353 

 Oceani (Rissoa), Aradas & Benoit. Conch. Viv. Sicil., p. 197. 



- R. subcrenulata, Schwartz. ...... 363 



Ochroleuca (Setia), Brusina. J. C., 1869, p. 247, . . . 355 

 Octona (Rissoa), Linn. Nilsson, Moll. Sued., p. 92. 



= R. membraiiacea, Adams. Var. ..... 329 



Oenonensis (Rissoa), Brusina. Moll. Dalrn., p. 20, pi. 3, fig. 6. 



= R. albella, Loven 334 



Olivacea (Alvania), Frauenfeld. V.oy. " Novara," pi. ii, fig. 



14, 339 



Olivacea (Dardania), Hutton. Trans. N. Zealand Inst., 1881, 



xiv, p. 147, 397 



Omalogyra, Jeffreys. Jour, de Conch., 1860. 



= Homalogyra, Jeffr. ........ 32-1 



Omphalotropis (Rissoella), A. Ad. Ann. & Mag., p. 332, 1860, 397 

 Onoba, H. & A. Adams. Gen. Rec. Moll., 1, 331, 1854, . 318, 346 

 Opalina (Jeffreysia), Jeffreys. Ann. Mag. N. Hist., 3d Ser., 



ii,351, . 396 



Orientalis (Rissoa), Nevill. Journ. Asiat. Soc. Benir., p. 161, 



1881. = R. triticea, Pse :.. . 380 



Ornata (Iravadia), Blanford. Journ. Asiat. Soc. Beng., p. 6, 



t. 13, f. 13, 14, 1867, 393 



Ornata (Rissoa), Phil. Zeitsch. fur Malak., p. 97, 184(5. 



= R. splendida, Eichw. ....... 325 



'Oryza (Rissoina), Garrett. Proc. Phila. Acad., p. 210, pi. 2, 



fig. 4, 1873, . 390 



Ovatella (Rissoa), Forbes. Rep. Brit. Assoc. xiii, p. 189, 



1843. := R. similis, Scacc : ) >27 



Pachia (Rissoa), Watson. Challenger Rept. xv, p. 602, pi. 



45, fig. 7, . . 348 



Pachylabris (Rissoina d^Orbignyi, var.), Nevill. Hand List, 



p. 92, 1885. =-- R. spirata, Sowb 388 



Pagodula (Rissoa), Buquoy, D. D. Moll. Rouss., p. 296, t. 56, 



f. 23-26, 366 



Pallida (Barleeia rubra, var.), Jeffreys. Brit. Conch, iii. . 392 

 Pallida (Homalogyra atomus, Ph. var.), Brus. Med. & Adr. . 399 

 Pallida (Microsetia fulgida, Ad. var.), Jeffreys. Monts. Nat. 



Sicil. iii, 280, 354 



Paludinoides (Rissoa), Calc. Monog. Spirorbis & Succinia Pal., 



1841, p. 10. r Setia fusca, Philip. . . . '. 354 



Papuana (Rissoa), Canefri. Ann. Mus. Civico, Genoa, ix, 288, 368 



