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WILLIAM HEALEY DALL. Note on two Helices new to the fauna of the United States.

The Nautilus, III, No.3, July, 1889, pp.25,26.

Determines the presence and distribution in Florida of Helix (Microconus) caeca Guppy and H. (M) granum Strebel.

WILLIAM HEALEY DALL. On the Genus Corolla Dall. The Nautilus, III, No.3, July, 1889, pp.30,31.

Shows that Cymbuliopsis Pelseneer is synonymous with Corolla Dall], and that the latter name should be adopted.

WILLIAM HEALEY DALL. The Behring Sea Controversy. 
New York Evening Post, Jul.10,1889.

A letter calling attention to certain historical facts bearing on the question.

WILLIAM HEALEY DALL. Deep-sea mollusks and the conditions under which they exist.

Proc. Biol. Soc. of Washington, V, 1890,pp.1-22.

An address delivered at the ninth anniversary leeting [[meeting]] of the Biological Society of Washington, Nov. 16, 1889.