Lehmann—Variations in Form and Size of Cyclops. 285 
Table I.— Variations in form and size of C. brevispinosus. 
All mature £>. 
Length & form 
out. ter. spine 
furca. 
Length of 
furca. 
Width of furca. 
1. terminal. 
2. base. 
Armature ter. 
joint 4th ft. 
Coll. H. L. 
No. 19. 
L. Winnebago. 
Aug. coll, by C. D. 
Marsh. 
.07mm. 
Rather thick at 
base but not blunt. 
.155 mm. 
1. .02 mm. 
2. .04 mm. 
Inner ex. 1 sp. 
br. ap. 2 sp. 
Coll. H. L. 
No. 20. 
L. Winnebago. 
Aug. coll, by C. D. 
Marsh. 
.0675 mm. 
Thick at base but 
tapering, not blunt. 
.16 mm. 
1. .02 mm. 
2. .037 mm. 
Inner ex. 1 sp. 
br. ap. 2 sp. 
Coll. H. L. 
No. 18 
L. Winnebago. 
Aug. coll, by C. D. 
Marsh. 
.0625 mm. 
Thick at base but 
tapering, not blunt; 
.15 mm. 
1. .025 mm. 
2. .04 mm. 
Inner ex. 1 sp. 
br. ap. 2 sp, 
Coll. H. L. 
No. 17. 
L. Winnebago. 
Aug. coll, by C. D. 
Marsh. 
.065 mm. 
Tapering, thick 
base, not blunt. 
.16 mm. 
1. .02 mm. 
2. .045 mm. 
Inner ex. 1 sp. 
br. ap. 2 sp. 
Coll. H. L. 
No. 16. 
L. Winnebago. 
Aug. coll, by C. D. 
Marsh. 
.07 mm. 
Tapering, not 
blunt. 
.165 mm. 
1. .025 mm. 
2. .04 mm. 
Inner ex. J sp. 
br. ap. 2 sp. 
Coll. H. L. 
No. 15. 
L. Winnebago. 
Aug. coll, by C. D. 
Marsh. 
.0625 mm. 
Thick at base, tap¬ 
ering, not blunt. 
.15 mm. 
1. .025 mm. 
2. .045 mm. 
Inner ex. 1 sp. 
br. ap. 2 sp. 
Con. H. L. 
No. 14. 
L. Winnebago. 
Aug. coll, by C. D. 
Marsh. 
.0675 mm. 
Thick at base, tap¬ 
ering, not blunt. 
.15 mm. 
1. .03 mm. 
2. .04 mm. 
Inner ex. 1 sp. 
br. ap. 2 sp. 
Coll. H. L. 
No. 12. 
Green Lake, Wis. 
Aug. coll, by C. D. 
Marsh. 
.056 mm. 
Slender apex. 
.125 mm. 
1- .025 mm. 
2. .045 mm. 
Inner ex. 1 sp. 
br. ap. 2 sp. 
Coll. C. D. M. 
No. 1636. 
Green Lake, Wis. 
.042 mm. 
Thick, rather 
blunt. 
.12 m. 
1. .027 mm. 
2. .042 mm. 
Inner ex. 1 sp. 
br. ap. 2 sp. 
Coll. C. D. M. 
No. 951. 
Lake Vieux Des¬ 
ert. Aug. 
.0475 mm. 
Thick but not 
blunt. 
.11 mm. 
1. .0215 mm. 
2. .038 mm. 
Inner ex. 1 sp. 
br. ap. 2 sp. 
Coll. C. D. M. 
No 1498. 
Little Green Lake, 
Wis. 
.0575 
Thick, rather blunt. 
.13 mm. 
1. .021mm. 
2. .0425 mm. 
Inner ex. 1. sp. 
br. ap. 2 sp. 
Coll. C. D. M. 
No. 1216. 
Bay at L T. Point, 
Green Lake.. 
Coll. C. D. M. 
No. 293. 
L. Gussie, Wis., 
July, ’91. 
.04 mm. 
So-called ayical 
blunt Spine. Very 
blunt. 
.0475 mm. 
Similar to No. 
1216, blunt, thick. 
.11 mm. 
.13 mm. 
1. .028 mm. 
2. .037 mm. 
m. 
2. .04 mm. 
Inner ex. 1 sp. 
br. ap. 2 sp. 
Inner ex. 1 sp. 
br. ap. 2 sp. 
