Freshwater Copepoda ily 
The Cayuga lake specimens had spherical egg sacks. It may be noted that 
this is also true of C. abyssorum Sars. In all the individuals the formula for the 
capi 7 the terminal segments of the exopodites of the swimming feet was 
Dy ee Os 
The females from Bernard harbour which were measured varied in length, 
exclusive of the furcal setz, from 1.625 mm. to 1.9 mm., thus not differing much 
from those found in the United States. 
Although C. strenuus is widely distributed as a cold-water form, in Green- 
land, Europe, Asia, and Northern Africa, it had not been noted on the American 
continent until the publication by Marsh in 1912, pp. 249-253, where it is stated 
that it had been found in collections made by Dr. Evermann in Rock pond, 
Axton, N.Y. Brehm, 1911, and Stephensen, 1913, p. 76, reported it in Green- 
land. The author has also found it in a collection in the United States National 
Museum labelled as from ‘‘ small, clear lake northern New York. From New 
York State Museum, through W. B. Van Name.” He has also found it in col- 
lections from Cayuga lake, N.Y., and in the contents of fish stomachs collected 
in Oneida lake, N.Y. A revision of some of the notes on Green lake, Wisconsin, 
makes it probable that it is also an inhabitant of that body of water. Doubtless 
it is widely distributed in America, but is not, generally speaking, found in large 
numbers. 
Cyclops vicinus Uljanin. 
In a tundra pond at Collinson point on June 13, 1914, were collected a 
number of specimens of Cyclops which were at first called C. strenuus. It was 
noted, however, that while agreeing with C. strenuus in all other ways, the spine 
formula for the terminal segments of the exopodites of the swimming feet was 
2, 3, 3, 3. This spine formula is true of C. vicinus Uljanin as described by 
Lillejeborg, 1901, and Sars, 1913. The other differences as pointed out by these 
authors, appear to be only variations. Schmeil, 1892, says that the spine formula 
of C. strenuus may be 3, 4, 3, 3, or 2, 3, 3, 3, or 3, 3, 3, 3. Schmeil, too, as 
remarked before, has stated that he does not consider the spinous armature of the 
swimming feet as sufficiéntly constant so that it may be considered a diagnostic 
characteristic of a species. In the author’s experience, however, while there 
has been found some variation in this spinous armature, in the collections from 
any given locality, the number of spines has been found practically constant. 
In all the specimens of the strenwus type examined from the Collinson point 
collection the formula was 2, 3, 3, 3; while in all the specimens from Cape 
Bathurst and Bernard harbour the formula was 3, 4, 3, 3. 
C. kolensis Lillj. and C. miniatus Lillj. have the same spine formula for 
the swimming feet as C. vicinus, and the author can see no good reason for 
separating them from C. vicinus. 
Cyclops capillatus Sars. 
Plate IV, figs. 4, 6, 8-11. 
1863. Cyclops capillatus Sars. pp. 248-9. 
“ “i 
1884 Herrick p. 156. 
1895 Me S Herrick and Turner, p. 115. 
1898 a . Schmeil, p. 152, Pl. XIII, fig. 1. 
1901 i ee Lilljeborg p. 54, Pl. IV, figs. 1-4. 
1913 as se Sars, pp. 43-4, Pl. XXIV. 
This species was first described by Sars in 1863, and practically all the 
published knowledge of the form is in the works of Sars and Lilljeborg. Herrick 
and Herrick and Turner simply republished the Latin description given by Sars, 
and stated that the species occurred only in Scandinavia. Schmeil figures the 
fifth foot, and, in a few words confirms the identity of the species. 
