No. 4. A Third Supplement to the Fifth Volume of the Terres- 

 trial Air-Breathing MollusJcs of the United States and adjacent 

 Territories. By W. G. BiNNEY. 1 



As promised in the Second Supplement, the Eastern Province Species 

 are here given, with addenda to those of the other Provinces. My pur- 

 pose is to bring the subject down to this date. The " Manual of Amer- 

 ican Land Shells," published subsequently to Vol. V., must also be used 

 in connection with the present paper. I have added figures of many 

 species to replace those of Volume V. 



BURLINGTON, NEW JERSEY, January 1, 1890. 



SPECIES OF THE NORTHERN REGION. 



It must be borne in mind that the Universally Distributed Species are also 

 found here. They are: 



Patula striatella, ANTHONY. 

 Microphysa pygmaea, DRAP. 



Placed in this genus on account of the similarity of its jaw and lingual 

 dentition to those of other species of Microphysa. See 2d Suppl., p. 35. 



Helicodiscus lineatus, SAY. 



Vallonia pulchella, MULL. 



Pupa muscorum, LINN. 



See below, p. 186, for vars. bigranata and Lundstromi. 



It may readily be doubted whether this species is not rather confined to the 

 Northern Region. 



1 The Terrestrial Air-Breathing Mollusks of the United States and the adjacent 

 Territories of Nortli America, described and illustrated by Amos Binney. Edited 

 by A. A. Gould. Boston, Little and Brown, Vols. I., II., 1851 ; III., 1857. Vol. 

 IV., by W. G. Binney, New York, B. Westermann, 1859 (from Boston Journ. Nat. 

 Hist.). Vol. V., forming Bull. Mus. Comp. Zoo!., Vol. IV., 1878. Suppli-mi-nt to 

 same, in sunu-, Vol. IX. No. 8, 1883. Seeoud Supplement, in same, Vol. Xill. 

 No. -2, 1886. 



Vol.. XIX. NO. 4. 



