MOLLUSCA. 
183 
• Hissoa salina, sp. n., Stossicli, 1. c. 1865, p. 10, Pirano, Adriatic. — R. ceno- 
nensis, R, framnfaldiana, R. strangulatay sp. n., Bruaina, Faun. Moll. Dalmat. 
pp. 20, 22, and 23, pi. 3. figs. 6, 7, and 8, Adriatic. — R. exilis, ap. n., Tryon, 
Am. Journ. Conch, ii. p. 12, pi. 2. fig. 18, San Diego, California, with R. 
cooperii (Tryon). 
Almnia schwartziana, sp. n., Brusina, Faun. Moll. Dalmat. p. 26, pi. 3. fig. 9, 
Adriatic. 
Rissoina funiculatay duclosi, spiralis, and exaspcrata, sp. n., Montrouzier 
and Souverbie, Journ. Conch, xiv. pp. 256-259, pi. 9. figs. 7-10, New 
Caledonia. 
Stimpson, W. Researches upon the Hydrobiince and allied 
forms. Smithson. Miscell. Coll. 201. Washington^ Au- 
gust 1865, 8vo, pp. 59, with 59 woodcuts. 
An excellent memoir, in which the author examines the cha- 
racters and principal species of small shells inhabiting fresh or 
brackish water formerly included in the genus Paludina, but 
distinguished from it by the spiral structure of the operculum, 
and recently split into too many generic divisions. Particular 
attention is paid to the form of the living animal and to the 
lingual dentition, which are illustrated by several original figm’es. 
The following genera are adopted by the author : — 
1. Stenothyra, Bens. Freshwater [brackish- water]. India, South-eastern 
Asia, and the neighbouring islands. Nematura deltce, Bens. 
2. Tricula, Bens. Freshwater. India. T. montana, Bens. 
3. Littorinella, Braun. Brackish or sea- water, in sheltered positions j pro- 
bably mundane. Turbo ventrosus, Montagu, and T. minutus, Totten. 
4. Hydrobia, Hartmann. Brackish water ) mundane. Turbo ulvce, Penn. 
[See below.] 
6. Moquin-Tandon. Freshwater. Europe and North America ; 
Rulimus viridis, Poiret, &c. North American species: Paludina nickliniana, 
Lea, and Pomatiopsis binneyi, Tryon. 
6. Paludestrina, Orbigny. Freshwater. South America and the West 
Indies. P, auberiana, Orb., &c. 
7. Pyrgula, Cristofori et Jan. Freshwater in mountainous regions. Europe 
and South America. Melania helvetica, Michelin=P. annulata, Cristofori et 
Jan [this species has never been found in Switzerland, but only in some 
lakes of Upper Italy, principally the lake of Garda] ; Bythinia bicarinata, 
Dupuy \Paludina bicarinata, Desmoulins, Michaud] j P. pyrenaica, Bourg. j 
and Paludestrina andicola, Orb. 
8. Tryonia, Stimps. (Record for 1866, p. 256). Freshwater. Southern Cali- 
fornia. T. clathrata, Stimps. 
9. Potamopyrgus, Stimps. (Record for 1865, p. 266). Freshwater. New 
Zealand. Melania corolla, Gould. 
10. Cochliopa, Stimps. (Record for 1866, p. 266)^ Freshwater. California. 
Amnicola rowelli, Tryon. 
11. Oillia, Stimps. (Record for 1866, p. 256). Freshwater. The Eastern 
parts of the United States of North America. Melania altilis. Lea. 
12. Somatogyrus, Gill. Freshwater. The central parts of North America. 
Amnicola depressa, Tryon. 
