Catalogue; Recently Described Mollusca 99 



PLANORnis DiLATATUS pEnnsylvanicus Pilsbry. 



Planorbis dilataius pcnnsylvanicus Pilsbry, Naut., XXX, 1916, p. 96. 

 Type locality: Glenolden, Delaware Co., Pa. 



Planorbis duryi Wetherby. 



Planorbis duryi Wetherby, Jour. Cin. Soc. Nat. Hist., 1879, p. 7, fig. 4. 

 Type locality : Everglades, Fla. Types No. 9712 Coll. Walker. 



Planorbis duryi intercalaris Pilsbry. 



Planorbis duryi intcrcakiris Pilsbry, Amer. Nat., 1887, XXI, p. 287. 

 Planorbis intercalaris Rhoads, Naut., 1899, XIII, p. 47. 

 Type locality : Florida. 



Planorbis eucosmius Bartsch. 



Planorbis cucosuiius Bartsch, Pr. U. S. Nat. Mus., 1908, XXXIII, p. 699, 



pi. 57, figs. 1-3. 

 Type locality: Greenfield Pond, Wilmington, N. C. 



Planorbis eucosmius vaughani Bartsch. 



Planorbis eucosmius vaughani Bartsch, Pr. U. S. Nat. Mus., XXXIII, 1908, 



p. 699, pi. 57, figs. 4-6. 

 Type locality ; Burkes Place, La. 



Planorbis exacuous Say. 



Commonly known as exacutus Say, but Dall (32, p. 91) restores the 

 name as originally used by Say. Henderson and Daniels (56, p. 56), after 

 careful consideration, have done likewise. It includes buchancnsis Lea ac- 

 cording to Vanatta {fide Simpson) (136, p. 54). 



Planorbis exacuous megas Dall. 



Planorbis exacuous megas Dall, Rep. Harriman Exp., XIII, 1905, p. 91. 

 Type locality : Birtle, Manitoba. 



Planorbis glabratus Say. 



Haldeman's and Binney's figures do not represent this species, which 

 is entirely distinct from trivolvis. It is not uncommon in Florida and in 

 the United States does not range outside of that state, (Pilsbry, 91, p. 321). 

 Dall (32, p. 86) includes lentus, which was described from New Orleans, 

 but this does not accord with Fischer and Crosse's (38, p. 65) identification 

 cf Say's type. The true glabratus belongs to section Planorbina and not to 

 Pierosoma. 



