THE WATER FLEAS (CLAUUC ERA) 



lare;e, some distance from apex of rostrum. Intestine convolultfj wiili vtn.i,! lup,' 

 $ with hook on first foot; vas deferens opens near claws Length, ^ . \u 13 mm f«.lor 



transparent-yellowish. 



Maine. New Hampshire; among weeds in lakes. The diflcrtntc in unlinnary setae o( i and 

 9 holds for all specimens hitherto seen. 



Q.2 MM. 



Fig. iioi. Parophryoxus liibulatus. (,.\flcr lJ(.K)lililc.; 



0-0-1-3 



Strchloccrus Sars 1862 



QO 



(88) Setae "^ ^ ^ ^^ ; animal small, spherical. 



Body round-oval, not compressed or crested. Labrum with larse, serrate, acute proco*. 



Antennules large, flat, bent, or rather twisted, broadened in distal jxirf: with l.itrml vnsc- 



hair near base, several hairs on posterior face, rows of fine hairs, and su! ■ • t.ir. 



Post-abdomen bilobed; the pre-anal part compressed, semi-circular: ; icd, 



with fine spines or hairs. Claws small, curved, with several equal mii. , u.n- 



cave edge. Five pairs of feet. Intestine convoluted, with small hepatic tcva. ^ ^Lurupean, 

 of 5. serricaudatus) small, triangular, much like 9 ; tirst foot without hook. 



90 (91) Dorsal margin of valves smooth. 



Strchloccrus scrriaiudalus (Eischcr) 1849. 



0.1 MM. ' Pre-anal part of po5t abtJo- 



nun with serrate margin and 

 bearing rows of fine haira. 

 Anterior margin of anlennule 

 somewhat tiM»the<l ('ol«»r 

 whitish ojaquc to yellowish. 

 LitiKth, 9. «^'i 05 nim : $, 

 la. 0:5 mm. 



Rare but widely distributol 

 in wetily yiooU .md mnrrin^ ol 

 lakes. Kep..: New 



England. \Vi> -ka, 



Louisiana l : >r- 



nia. 





91 (90) Valves reticulated, the edges of 

 ridges, which give 

 0.05 MMa 



Fir.. iio->. 



rfaiiu. 



the reticulations making scalc-Ukc 



the dorsal margin a scrrale apjH-arancc. 



Strchloccrus pygnuuus Sars ux)i. 



Pre-anal part of post -abdomen not serrate, with 4-5 ro^j 

 of fine hairs. Color grayish white, uixi.jue. to nearly Mac* 

 in enhinnial 9 . Z unknown. , / .i„ 



Len''th 9 o.2^.-'S mm. The smallest member of the 



familv^and one of the smallest of the group -— '" 



weedy pools, with 5. icrruaudaiui. 



1-lG. lioj. atreUvccrui p> 



