96 Bryant Walker 



Planorbis antrosus portagensis Baker. 



Planorbis hicarinatns portagcnsis Baker, Naut., XXII, 1908, p. 45 ; Walker, 



Naut., 1909, XXIII, p. 8, pi. I, fig. 9. 

 Type locality : Portage Lake, Aroostook Co., Me. 



PiANORBis ANTROSUS royalEnsis Walker. 



Planorbis hicarinaius royalensis Walker, Naut., XXIII, 1909, p. 9, pi. I, 



fig. II. 

 Type locality : Siskowit Lake, Isle Royale. Mich. 



Planorbis antrosus striatus Baker. 



Planorbis bicarinatus striatus Baker, X^aut., XV, 1902, p. 120; Tr. Acad. 



Sci. St. Louis, 1906, XVI, p. 9, pi. I, fig. II. 

 Type locality : Coldspring Park, Milwaukee, Wis. Also recent. 

 See Walker 151a, p. 7. 



Planorbis antrosus unicarinatus Haldeman. 



Planorbis bicarinatus unicarinatus Haldeman, Mon., 1844, p. 7; V/alker, 



Naut., XXIII, 1909, p. 3, pi. I, fig. 6-8. 

 Type locality : Schuylkill River, Pa. 



Planorbis arcticus Moller. 



Planorbis arcticus Moller, Index ]\Ioll. Gronl., 1842, p. 5; Morch, Am. J. 



of Con., 1868, IV, p. 32, pi. 4, fig. 9. 

 Type locality : Kudsuk, Greenland. Also Fort Chimo, Ungava, Labrador. 



Planorbis arizonensis Pilsbry and Ferriss. 



Planorbis filocinctus Pilsbry and Ferriss, Pr. A. N. S. P., 1906, p. 165, pi. 



IX, figs. 1-3, not of Sandberger. 

 Planorbis arizonensis Pilsbry and Ferriss, Pr. A. N. S. P., 1915, p. 390. 

 Type locality : San Pedro River, Benson, Ariz. 



Planorivis BiLLiNCSi Lea. 



Planorbis billingsi Lea, Pr. A. N. S. P., 1864. p. 11 1; Jour. A. N. S. P., 

 1866, VI, p. 15, pi. 23, fig. 72; Obs.. 1866, XI, p. 115, pi. 33, fig. 72. 

 Type locality : Ottawa River, Canada. See parvus. 



Planorbis callioglyptus A^anatta. 



Plnvorhis caUioqlyptus Vanatta, Naut., IX, 1895, p. 54. 

 Type locality : Freeport, Wash. 



Is opcrcnlaris planulatus Cooper according to Dall (2,2, p. 92). 



