700 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



Clepsine parasitica Diesiug. (p. 678.) 



Judging from the extreme northern and western range of this species, 

 it must occur in Lake Superior. 



Clepsine papillifera Verrill. (p. 683.) 

 Collected at Bad Eiver by Mr. J. W. Milner. 



ICHTHYOBDELLA PUNCTATA Yerrill. (p. 687.) 



Dredged in 6 to 8 fathoms among the Slate Islands. 

 TUEBELLAEIA. 

 Procotyla fluviatilis Leidy. 



Dendrocoelum superium Leidy, Proceedings Academy Nat. Sci. Ptiiladelphia, yoL 

 V, 1851, p. 288, {non Girard.) 



Procotyla fluviatiUs Leidy, MSS. ; Stimpson, Proceedings Academy.Nat. Sci. Phila- 

 delphia, vol. ix, 1857, p. 23; Diesing, Revision der Turbellarien, Sitzungsbe- 

 richte der mathem.-naturwissensch. Classe der kais. Acad, der Wissensch. zu 

 Wieu, 1861, J). 517 ; Smith and Verrill, American Journal of Science, 3d series, 

 vol. ii, p. 452, 1871 ; and Preliminary Report on Dredging in Lake Superior, p. 

 1025, 1871, 



Numerous specimens of this species were dredged in 8 to 13 fathoms 

 among CladopJiora on the south side of Saint Iguace Island. When 

 living, they were dirty- white, mottled with brown. 



It is not uncommon near New Haven, Conn., and in other parts of 

 New England. 



MOLLUSCA. 



The following list of the mollusks of Lake Superior is largely a com- 

 pilation from the publications of Say, Haldeman, Gould, Lea, Prime, 

 and Binney, and no sort of revision of the species has been attempted. 

 I have, however, in all cases given the authority for the insertion of the 

 species when I have not observed them myself. 



GASTROPODA. 



Por the identification of several of the following species collected by 

 myself I am indebted to Charles M. Wheatley, esq., of Phoenixville, Pa. 

 For convenience of identification I have added, under most of the spe- 

 cies, a reference to Parts II and III of Mr. Binney's Land and Fresh- 

 Water Shells of North America, published in 1865 in the Smithsonian 

 Miscellaneous Collections. 



Valvata tricarinata Say. 



Binney, op. cit., part iii, p. 9, 

 From the stomach of white-fish taken at Sault Sainto ]\Iarie and the 

 stomach of sturgeon taken at Sand Island. 



