884 THE AMERICAN NATURALIST. [Vor. XXXIV. 
NAME. CREST. ROSTRUM. ANTENNA. SPINE. 
Wabasis Round, low, Long Basal joint Long, slightly 
slightly nar- d ire oy upturned 
rower than aches 
carapace se of the a 
Crooked Little higher Long 
than the 
above-men- 
tioned form : 
Mendota price eut Postero- Curved, t Very long, 
n+ ventral, bare isis recurved 
"a res of ending in ing m postero- 
carapace sharp po dorsally 
Winnebago Nearly $ length | Short, Slight, with Middle of later- 
of carapace rounded short basal al aspect, and 
and as broa joint a little longer 
Twin Pointed apex, | Rather Slight, with han head 
dorsal to me- short short basal 
dian line of joint 
, lateral aspect : 
Tomahawk Apex somewhat | Rather Slight, with 
more pointed short short basal 
eue the fore- joint 
ing 
Kawaquesaga, | Apex HT Rather dpt aed with 
at Minocqua | acumin short du al 
Reed's Antero-dorsal | Short se trong Sum 1 
convexity pro- joint greatly 
longed into curved 
blunt apex 
Superior, near | Ventral line Extremely | Basal joint 
Ashland curved, dor short and | nearly straight, 
js straight rounded and strong 
slightly up- 
ward 
Gogebic Elongated and | Long and Short and 
~— re- blunt slight 
rved 
Wingra ae Short and | Large and Near median 
prominent blunt strong line of lateral . 
saboralar aspect 
elevation 
Vieux Desert genes 4 length | Long and Large and 
vig blunt strong 
ecurved 
St. Claire Medis and Rather Strong 
ventral curves| long and 
marked, apex rounded 
recurved 
Kawaquesaga, | Dorsal and ven- | Rather 
at Minocqua | tral curves long and 
marked, apex rounded 
recurved 
