144 
MOLLUSCA. 
1869) ; id. tom. cit. p. 62, pi. xxi. figs. 17 & 18 (= Observ. Union, xiii. 
pi. xxi. figs. 17 & 18). 
Paludomus luteus, sp. n., H. Adams, P. Z. S. 1874, p. 585, pi. Ixix. 
fig. 6, Borneo. 
LiTOEINIDiE. 
Litorina tristis, sp. n., Moussou, JB. mal. Ges. i. p. 101, pi. v. fig. 5, 
mouth of river Rabat, Morocco. 
Fossarus caledonicus, sp. n., Crosse, J. de Conch, xxii. p. 206, New 
Caledonia. 
RiSSOIDiE. 
Ilissoina minuta, Andamans, evanida, Andamans, and pererassa, Mau- 
ritius, G. & H. Nevill, J. A. S. B. (n. s.) xliii. pt. 2, p. 25, pi. i. figs. 13- 
15 ; R. supracostata, scidptilis, millecostata, oryza, horrida, scahra, casta- 
neogramma [1], gracilis, debilis, affinis, terehra, and turrita, Garrett, P. Ac. 
Philad. 1873, p. 209, pi. ii. figs. 1-12, Polynesia : spp. nn. 
Rissoa amhigua, Brugnone, Miscell. Malac. 1873, p. 9, fig. 14 (= alls- 
ryana, Benoit, 1872, not described, Aradas & Benoit, Conch, viv. mar. 
Sicil.ii. p. 211, pi. iv. fig. 11 ; ? = tincta, Watson, 1873, Monterosato, J. de 
Conch, xxii. p. 262, Mediterranean) ; R. gemmula, Fischer, in Berchon, 
Folin and P^rier’s Fonds de la mer, i. p. 151, pi. xxiii. fig. 3, Gulf of 
Gascony, 60 fathoms ; R. vitrea, littoriniformis, infrastricta, infratincta, 
venusta [pre-occupied], crystallina, hyalina, and truncata, Garrett, P. Ac. 
Philad. 1873, p. 215, pi. ii. figs. 19-26, Polynesia: spp. nn. 
Plagiostyla, g. n., iov Rissoa lactea (Mich.), and some allied species, re- 
markable by the papillary apex, transparent shell, descending last whorl, 
distinctly semilunar aperture, and oblique rectilinear pillar-lip. . P. as- 
turiana, sp. n., P. Fischer, Fonds de la mer, ii. p. 50, pi. ii. fig. 5, and 
Act. Soc. L. Bord. xxix. p. 203, Asturia and Bay of Biscay, 10-18 
fathoms. 
Rissopsis, g. n. ; shell cylindrical, thin, apex truncate, aperture sub- 
oval, entire, angulated above, peristome rather thin, somewhat expanded, 
pillar oblique, arcuate. R. typica, sp. n., Garrett, P. Ac. Philad. 1873, 
p. 228, pi. iii. fig. 55, Viti and Samoa islands. 
Peringia, g. n., proposed by A. Paladilhe for Hydrohia ulvai (Penn.), 
and allied species, living in brackish water, and characterized by a bi- 
lobate snout, a black spot near the tip of the tentacles, somewhat 
flattened sub-carinate whorls, and a thin callosity on the inner side of the 
aperture. He describes the following species : — P. pictonum, sp. n., 
pi. iii. figs. 29 & 30, brackish water at Rochelle and Sables d’Olonne ; 
sp.n., pi. iii. figs. 31 & 32, salt marshes at Pouliguen, near Nantes ; 
ulvcc (Penn,), described from English specimens; {Assiminea, Paladilhe, 
1867), gallica, alluvial deposits of the B(^tru, near St. Amour, Jura, 
near a saline spring ; sequanica (Bourguignat, MS.), sp. n., mouths of the 
Seine and Orne ; massoti and penchinati (Bourguignat, MS.), spp. nn., 
Salces, Eastern Pyrenees ; margaritoc, new name for Paludestrina 
tetropsoides (Paladilhe, 1870), pi. iii. figs. 33 & 34, living in a small pond 
