GASTROPODA (pECTINIBRANCHIA) . 
165 
Rissoa. Many notes concerning the synonymy and varieties of the 
60 Mediterranean species; Monterosato, Atti Acc. Palerm. 1875, 
pp. 26-28. 
Rissoa octona (L), membranacea (Adams) = lahiosa (Montagu), cornea 
(Loven), and parva^ var. interrupta (Adams), all from the Baltic, com- 
paratively described by F. E. Koch, JB. mal. Ges. ii. pp. 181-187. 
Rissoa watsoni (Schwartz) var. in the Mediterranean ; Monterosato, 
1. c. p. 27. 
Rissoa herguelenif sp. n., Edgar Smith, Ann. N. H. (4) xvi. p. 69, Ker- 
guelen’s Island. 
Rissoa {Cingula) marioe^ sp. n., J. E. Tenison Woods, 1. c. p. 15, King’s 
Island, Bass’ Straits. 
Eatonia, g. n. (pre-occupied by Hall, 1859, fossil Brdchiopoda, Q. J. 
Conch, i. p. 97 — Eatoniella, Dali, 1876). Shell resembling that of 
Rissoa, aperture subcircular, peristome simple, continuous, pot thickened 
on the outside ; operculum pauci- or uni-spiral, with a prominent 
appendage, directed towards the columellar margin. E. kerguelensis, 
caliginosa, and suhrufesccns, spp. nn., Edgar Smith, 1. c. pp. 70 & 71, 
Kerguelen’s Island. 
Shenea suhcanaliculata, sp. n., id. Z. c. p: 71, Kerguelen’s Island. 
Hydrohia ventrosa (Montagu) = stagnalis (Baster, Linn6) ; Metzger, 
Ber. Unters. Pommerania, p. 256. 
Hydrohia, plicata, sp. n., Edgar Smith, 1. c. p. 103, Avomori Bay, north 
of Nippon, 7 fathoms. 
Peringia [Zool. Rec. xi. p. 144] minoricensis, sp. n., Paladilhe, Ann. 
Sci. Nat. (6) ii. art. 8, p. 14, pi. xxi. figs. 27-29, Port Mahon. 
Amnicola prcetutiorum, id. 1. c. p. 11, pi. xxi. figs. 21-23, Abruzzi, Italy ; 
A. moussoni and horneensis, Issel, Ann. Mus. Genov, vi. [1874], p. 450, 
pi. vii. figs. 13-15 and 16-18, Sarawak, Borneo : spp. nn. 
Paludinella andorrensis, sp. n., Paladilhe, 1. c. p. 13, pi. xxi. figs. 
24-26, Yal d’Andorre and Catalonia. 
Palddinid^. 
Paludina ohaensis, sp. n., Clessin, JB. mal. Ges. ii. p. 38, pi. ii. fig. 5 
[scarcely distinct from fasciata (Miill.)], Oka River, Russia. 
Paludina digona, (Blanf.), Irawaddy, variata (Frauenf.), Pondichery, 
and ceylonica (Dohrn) var. ecarinata, Ceylon ; Hanley & Theobald, 
Conch. Ind. p. 47, pi. cxv. figs. 7-9. 
Paludina frauenfeldi (Morelet, 1869) = ingallsiana (Reeve, 1863, nec 
Lea) [= cingulata, Martens, 1860, = martensi, Frauenfeld, 1865] ; tro- 
choides (Martens, 1860) = umhilicata (Reeve, 1863, nec Lea) ; sumatrensis 
(Dunker, 1852) = poly gramma (Martens, 1860) = lineolata (Mousson, 
1862) = filosa (Hanl., 1863) ; prcemorsa (Bens.) = fulva (Reeve), the 
young of which == carinata (Reeve) ; all these and other species from 
Siam reviewed by Morelet, Series Conch, iv. pp. 297-311. P. cochin- 
cJiinensis (Morelet, 1866), id. 1. c. p. 299, pi. xiv. fig. 3 ; P. eyriesi 
(Morelet, 1865), a variety of which = fischeriana (Mabille & Mesle), 
