GEOGRAPHICAL DISTRIBUTION. 
Moll. 27 
donta and some other fresh-water shells iu space and time within Western 
North America ; P. Cal. Ac., Nov. 20, 1882. 
Montana , Dakota , and Minnesota. Note on land shells collected by A. 
Krause, with some new varieties ; E. v. Martens, SB. nat. Fr. 1882, 
pp. 138-141. 
Fremont County, Iowa. List of 30 fresh- water shells, mostly Unionidce , 
and 10 land shells, by R. E. Call in his “History of Fremont County,’’ 
1880. The Nishnabotna River, in South-west Iowa, is the most western 
locality of Unio pressus (Lea) ; id. Am. Nat. xv. p. 392. 
Saltville in Virginia. Univalves and bivalves collected by H. C. Lewis, 
identical with those of Houston River ; Lesley, P . Am. Phil. Soc. xix. 
p. 155. 
Roan Mountains , North Carolina. Land shells by A. G. Wetiierby, 
J. Cincinn. Soc. iv., Dec. 1881. 
15. West Indies and Central America. 
St. Vincent. 14 inoperculate, including Bulimus oblongus (Miill.), and 
2 operculated species of terrestrial Mollusca enumerated by Leciimere 
Guppy, P. Sc. Ass. Trinid. xii. 1881-82. The names also in J. de Conch, 
xxx. p. 308. 
Mexico. H. Strebel (title see above) concludes his valuable work on 
the Mexican terrestrial Mollusca by a fifth part, which treats of Ortha- 
licus , Bulimulus , Opeas, Spiraxis , Subulina, with some new allied genera 
and fiually Vaginulus ; also in this part a number of anatomical 
descriptions of Mexican, or else American, species are given by G. 
Pfeffer. 
16. South America. 
New Granada. Some terrestrial species by Dunker, JB. mal. Ges. ix. 
pp. 377-380. 
Para , Brazil. Several land shells described by'H. Doiirn, JB. mal. 
Ges. ix. pp. 97-114. 
Province Rio Grande do Sul. Some new fresh-water species from 
Taguara del mundo novo, collected by Y. Ihering, described by Clessin, 
Mal. Bl. (2) v. pp. 188-191, pi. iv. figs. 5-7. 
b. Marine Mollusca. 
1. Arctic Seas. 
II. Friele discussos 34 species and some varieties of Buccinidce , col- 
lected during the Norwegian Expedition to the Arctic Seas in 187G-78, 
between Arctic Norway, Iceland, Jan Mayen, and Spitzbergen, and gives 
very valuable information concerning their occurrence, variability, den- 
tition, ovicapsules, aud embryonal shells ; Norske Nordhavs Expedition, 
Zoologi, i., Buccinidce , 38 pp. 6 pis. 
40 species of Gastropoda , 2 Solenoconchce, 2 Pteropoda , and 1 Cephalo- 
pod, none new, collected during the cruises of the Dutch vessel * Willem 
