74 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
A LIST OF ALL ROTATORIA HITHERTO FOUND IN THE UNITED STATES, 
AND THE LOCALITIES WHERE THEY HAVE BEEN OBSERVED, 
WITH DESCRIPTIONS OF TWO NEW SPECIES. 
[Accompanied by plates 14-22, figs. 1-46.] 
Order I. RHIZOTA. 
Much less study has heeu given to the Rhizota, or attached Rotifera, by the present writer, than 
to the free-swimming forms, and the same seems to' he true of other students of American Rotatoria. 
Doubtless much remains to lie done before even an approximately full list of the American Rhizota 
can he given, and some of the forms already listed are sadly in need of careful study. There is much 
room for work in preparing full and accurate descriptions and figures of the American Rotifera of 
this group. 
lily 1. FLOSCULARIADiE. 
FLOSCULARIA Oken. 
1. F. cornuta Dobie. 
On FJodea from East Harbor, Lake Erie. 
Pond near Bangor, Me. (J. C. S., ’83). Nigger Creek, Grand Island, Niagara River (Kellicott, 
’87). Shiawassee River at Corunna, Mich. (Kellicott, ’88). Chippewa Lake, Mecosta County, Mich., 
and Lake St. Clair (Jennings, ’94). Sandusky Bay, Lake Erie, and Buffalo, N. Y. (Kellicott, ’96). 
2 . F. algicola Hudson. 
On Cladophora and Cliara, in East Swamp, South Bass Island. 
The specimens found agreed perfectly with the description given by Hudson in the small size 
(210//= 0.01 inch in length), in the dots on the corona arranged in symmetrical patterns, and in other 
respects; but they inhabited evident tubes, while Hudson was unable to find a tube. 
3. F. mutabilis Bolton. 
This free-swimming form seems widely distributed in waters of the Great Lakes, although it is 
never present in large numbers. It was frequently taken with the tow net and plankton net in the 
open lake about South Bass Island, in Lake Erie. Also found in a swamp close to United States 
fish-hatchery on South Bass Island, at times when the water of the lake flowed into the swamp. 
Lake St.Clair (Jennings, ’94). Lake Michigan, Pine Lake, Round Lake, and West Twin Lake, 
near Charlevoix, Mich. (Jennings, ’96). Sandusky Bay, Lake Erie (Kellicott, ’96). 
4 . F. pelaeica Rousselet. 
The distribution of F. pelagica is about the same as that of F. mutabilis. I found it in collections 
made with the tow net and plankton net in Lake Erie at various places near South Bass Island. It is 
noteworthy that neither of these limnetic Floscularias have been reported from the carefully studied 
waters of the Illinois River. 
Lake St.Clair (Jennings, ’94). Lake Michigan, Round Lake, and Pine Lake, near Charlevoix, 
Mich. (Jennings, ’96). 
5. F. millsii Kellicott. 
A single specimen attached to a Difflugia shell, from the Portage River, Ohio, about a mile from 
Lake Erie. 
Black Creek, Ontario, Canada (Kellicott, ’85). Nigger Creek, Grand Island, Niagara River 
(Kellicott, ’87). Sandusky Bay, Lake Erie (Kellicott, ’97). Also found by Mr. J. B. Shearer at Bay 
City, Mich, (according to Kellicott, ’97). 
F. ornata Ehrenberg. — Pond near Bangor, Me. ( J. C. S., ’83). “American species” (Kellicott, ’84). 
Minnesota (Herrick, ’85). Nigger Creek, Grand Island, Niagara River (Kellicott, ’87). Shiawassee 
River at Corunna, Mich. (Kellicott, ’88). Exhibited in New York (Helm, ’89 and ’91). In the neigh- 
borhood of Cincinnati, Ohio (Turner, ’92). Chippewa Lake, Mecosta County, Mich., and Lake St. Clair 
(Jennings, ’94). Sandusky Bay, Lake Erie (Kellicott, ’96). Waters connected with the Illinois River 
at Havana, 111. (Hempel, ’98). 
F. campanulata Dobie. — Black Creek, Ontario, Canada (Kellicott, ’85). Nigger Creek on Grand 
Island, Niagara River (Kellicott, ’87). Shiawassee River at Corunna, Mich. (Kellicott, ’88). West 
Twin Lake, Muskegon County, Mich.; McLaren Lake, Oceana County, Mich. (-Jennings, ’94). West 
Twin Lake, near Charlevoix, Mich. (Jennings, ’96). Sandusky Bay, Lake Erie (Kellicott, ’96). 
