80 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
Family 6. ASFLAN CHNAD5!. 
ASPLANCHNA Gosse. 
16. A. priodonta Gosse. 
In towings from Lake Erie. Not abundant. 
Pond in Buffalo City Park (Kellicott, ’87). Abundant in Lake St. Clair (Jennings, ’94). Lake 
Michigan, Iiound Lake, and Pine Lake, near Charlevoix, Mich. (Jennings, ’96). Sandusky Bay, Lake 
Erie (Kellicott, ’97). Waters connected with the Illinois River at Havana, 111. (Hempel, ’98). 
A. lierriclcii de Guerne. — It is characteristic of the poorness of the plankton in Eotifera, in Lake 
Erie, about South Bass Island, that Asplanchna lierriclcii was not found there at all in the summer of 
1898, and that A. priodonta was not abundant. In previous examinations of Lake St. Clair and Lake 
Michigan both had been found very abundant. This species was first figured by Herrick (’84, plate v, 
fig. 8) from Minnesota, under the title “flask-shaped rotifer, hermaphrodite, with eggs and sperm.” 
Other localities where it has since been found in America are as follows: Lake St. Clair (Jennings, 
’94); Lake Michigan, Round Lake, Pine Lake, and Susan Lake, in north Michigan (Jennings, ’96); 
waters connected with the Illinois River at Havana, 111. (Hempel, ’98). 
A. brightwellii Gosse. — Neighborhood of Cincinnati, Ohio (Turner, ’92, under the name A. cincin- 
natiensis Turner). Phipps Conservatory tanks at Allegheny, Pa. (Smiley, ’95). Waters connected with 
the Illinois River at Havana, 111. (Hempel, ’98). 
A. ebbesbornii Hudson. — Pond near Philadelphia (Leidy, ’87). Waters connected with the Illinois 
River, at Havana, 111. (Hempel, ’98). 
A. girodi de Guerne. — Waters connected with the Illinois River at Havana, 111. (Hempel, ’98). 
A. amphora Hudson. — Found at Philadelphia by Leidy, according to Hudson and Gosse, ’89 
(Supplement, p. 13). 
A. cincinnatiensis Turner = A. brightwellii Gosse. 
A. magnificus Herrick = Asplanchnopus myrmeleo Ehr. 
ASPLANCHNOPUS De Guerne. 
17. A. myrmeleo Ehrenberg. 
East Swamp, South Bass Island. Many. 
Minnesota (Herrick, ’84, under the title “ deadly enemy to Chydorus,” and ’85, under the name 
Asplanchna magnificus n. sp.). Pine Lake and West Twin Lake, near Charlevoix, Mich. (Jennings, '96). 
Marshes in the region of Sandusky, Ohio (Kellicott, ’96). Waters connected with the Illinois River at 
Havana, 111. (Hempel, ’98). 
Ascomorpha ecaudis Perty (Sacculus viridis Gosse). — Shiawassee River at Corunna, Mich. (Kelli- 
cott, ’88). Lake St. Clair and Whitmore Lake, near Ann Arbor, Mich. (Jennings, ’94). Round Lake, 
near Charlevoix, Mich. (Jennings, ’96). Waters connected with the Illinois River at Havana, 111. 
(Hempel, ’98). 
There seems to be some question as to the proper specific name of this animal. According to 
de Guerne (’88) Perty’s name ecaudis has the priority, dating from 1850. But Weber, ’98, in his recent 
very careful paper, uses the name helvetica, likewise credited to Perty, without giving the date of this 
name, though he cites also the name ecaudis as a synonym. Perty’s papers have not been at my com- 
mand in order to settle the uncertainty. 
A. hyalina Kellicott. — Pool at Corunna, Mich. (Kellicott, ’88). Lake St. Clair and Whitmore 
Lake, Mich. (Jennings, ’94). West Twin Lake, near Charlevoix, Mich. (Jennings, ’96). 
A. orbicularis Kellicott. — “Biemullers Cove,” Sandusky Bay, Lake Erie (Kellicott, ’97). Weber 
(’98) holds that this species was described from contracted examples of Gastropus stylifer Imhof ( Notops 
pygmceus Caiman). This appears not improbable. 
HERTWIGIA Plate. 
18. H. parasita Ehrenberg. 
In Yolvox from East Swamp, South Bass Island. 
A rotifer parasitic in Yolvox, and therefore doubtless this species, has been recordod from Paterson, 
N. J. (N. N., ’75), and from Hyde Park, Chicago, 111. (Attwood, ’78). It has also been recorded by 
name from Sandusky Bay, Lake Erie, and Minerva Park, Columbus, Ohio (Kellicott, ’97). I have also 
found it in the reservoir of the town water supply of Hanover, N. H. (H. S. J.). Though often placed 
with the Notommatadce, the opinion expressed by many authors that this creature is more nearly related 
to Ascomorpha is probably correct, so that it seems best to place it here in close juxtaposition with 
that genus. 
