LYMNZIDZ OF NORTH AMERICA. 481 
DeCamp, W. H. 
v7 1881. List of the Shell-bearing Mollusca of Michigan. Kent Sci. Inst. Mis. 
Pub. No. 5. 
DeKay, James E. - 
1839. Catalogue of the Animals belonging to the State of New York, as far 
as They have been Figured and Described. Assembly No. 50, Janu- 
ary 1. 
1843. Zoology of New York. Part V, Mollusca. Albany. 
Delessert, M. Benjamin. 
1841. Recuil de Coquilles décrites par Lamarck, etc., et non encore figurées. 
Paris. 
Deshayes, G. P. 
1830. Encyclopédie Méthodique., II, p. 362. 
1838. Lamarck’s Histoire Naturelle des Animoux sans Vertebrés, Ed. 2, 
VALE. 
D’Urban, W. S. M. 
1859. Catalogue of Animals and Plants Collected and Observed in the 
Valley of the River Rouge and the Neighboring Township, in the 
Counties of Argentevil and Ottawa. Geol. Surv. Can., Rep. Prog., 
pp. 241-243. 
1859-60. Same in Canadian Naturalist, IV, PP. 252-276, 1859; V, pp. 81-99, 
1860. 
DeVarigny, H. 
1894. Recherches sur le nanisme experimental. Contribution a letude de 
Vinfluence du milieu sur les organismes. Journ. Anat. Pyhsiol., XXX, 
pp. 147-188. 
Dybowski, W. 
1884. Studien itber die Zahnplatten der Gattung Limnea Lam. Bull. Imp. 
Soc. des Nat. de Moscou, LIX, ii, pp. 256-262. 
1903. Beschreibung einer neuen Stisswasser-Schencke, Limnza (Limnus) 
lagorii m. Bull. Acad. Imp. Sciences St. Petersburg, XVIII, No. 3, 
pp. 113-116. 
1903. Bemerkungen iiber die gegenwirtige Systematik der Siisswasser- 
Schnecken. Nach. Deutsch. Mal. Ges., XXXV, pp. 130-144. 
Earle, John Milton. 
1833.- List of Land and Fresh-Water Shells of Massachusetts so far as 
They have been Ascertained. Hitchcock’s Report on the Geology, 
Botany, and Zoology of Massachusetts, Ed. I, PP. 557-562. 
1835. List of Land and Fresh-water Shells of Massachusetts so far as 
They have been Ascertained. Hitchcock’s Report on the Geology, 
Botany, and Zoology of Massachusetts, Ed. 2, pp. 22-23. 
++ 1835. Catalogue (of Mollusca) of the Boston Society of Natural History. 
Hitcheock’s Report on the Geology, Botany and Zoology of Massa- 
chusetts, Ed. 2, pp. 25-28. 
Eisig, Hugo. 
1869. Beitrage zur Anatomie und Entwicklungsgeschichte der Geschlectsor- 
gane von Lymneus. Zeitsch Wissen. Zool. XIV, pp. 297-321. 
