704 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



2)liora, on the south side of Saint Ignace Island. It was also found in the 

 stomachs of white-fish taken at Sault Sainte Marie, and in the stomach 

 of a sturgeon taken at Sand Island. 



Small specimens of the variety acuminatum Prime were dredged in 6 

 to 8 fathomSj among the Slate Islands. 



Sph^rium fabalis Prime. 



Op. cit., p. 40. 



Lake Superior, (Prime.) 

 Sph^erium emarginatum Prime. 



Op. cit., p. 43. 



Eegion of Lake Superior, (Prime.) 

 Sph^rium flavum Prime. 



Op. cit., p. 43. 



Sault Sainte Marie, (Prime.) 

 Sph^rium Jayanum Prime. 



Op. cit., p. 46. 



Lake Superior, (Prime.) 



S^hwrium partumeium Prime (op. cit., p. 45) undoubtedly occurs in 

 the region of Lake Superior, and probably many other species will be 

 found there. 



PisiDiUM VIRGINICUM Bourguiguat. 



Prime, op. cit., p. 61. 



Dredged in abundance among Cladophora in 8 to 13 fathoms on the 

 south side of Saint Ignace Island. Mr. Prime remarks that the speci- 

 mens are unusually light and fragile. 



PisiDiUM COMPRESSUM Prime. 



Op. cit., p. 64. 



Dredged in 4 to 6 fathoms at the eastern end of Saint Ignace Island. 



PisiDiUM ABDITUM HaUleman. 

 Prime, op. cit., p. 68. 



Varieties of this species were dredged among CladopJiora, in 8 to 13 

 fathoms, on the south side of Saint Ignace Islaud; in 6 to 8 fathoms at the 

 eastern end of the same island ; and in 15 to 18 fathoms, sandy bottom, 

 at Simmons' Harbor. 



PISIDIUM ABDITUM, var. ABYSSORUivi Stimpsou, MSS. 



This is a very small translucent form, dredged by Dr. Stimpson, in 

 Lake Michigan, and by him named in manuscript. Mr. Prime, however, 

 regards it as a stunted form of P. abditum. Dr. Stimpson's specimens 



