ENTOMOSTRACA OF MINNESOTA. 209 



Bosniina curvirostris Fischer. 



Body rounded, length little greater than height, front somewhat 

 protuberant, dorsal margin strongly arched, autennules short and 

 stroDgly curved. Flagellum midway between eye and end of beak. 

 Seven to eight setfe upon the cephalic aspect of antennae. Length 0.39 

 to 0.4 mm. 



* Bosniina striata Herrick. 



Plate LXV, Fig. 1. 



Herrick '82. 



This form is very imperfectly known, but resembles B. hoJiemica 

 and may be identical, but that is a much larger form. Oblong, slen- 

 der, greatest height cephalad of middle, front strongly arched. Eye 

 large. Flagellum near the beak. Autennules very long, curved. 

 Shell irregularly marked with anastomosing longitudinal lines pro- 

 ducing a deformed reticulation. Spine large, curved, but not long. 

 Ventral margin sinuous, ciliated cepbalad. Length 0.25 mm. 



* Bosniina atlantaensis Turner. 



This is not adequately described. It, however, affords proof of the 

 existence of a fourth type of Bos)nma in America. B. lonffirostris, B. 

 cornuta and B. striata all have the shell marked and peculiarities 

 of structure otherwise. The southern form has a smooth shell, long 

 autennules, depressed spine, sinus between head and body, and fla- 

 gellum nearer to the eye than to the sensory sette. The post-abdomen 

 is broad and the claws toothed. The whole genus requires revision. 



Other species which cannot now be placed are the following: 



B. gihhera and B. rotunda Schoedler. 



B. Icevis Leydig, probably the young of longirostris. 



B. londensis Norman and Brady. 



B. ohtusirostris Sars, probably is B. brevirostris. 



B. lacustris and B. nitida Sars. 



B. coregoni ISTorman and Brady, is B. liUjeborgii. 



B. macrorhyncha, a species from the Nile. 



FAMILY LYNCODAPHNIDJ: Sars GI; Herrick 8L 



This is a rather small family with several genera of minute animals 

 which are abundant only in summer. Many, and indeed most, of the 

 species are among the rarer of fresh water crustaceans of this group, 

 and a few are among the rarities which only now and then reward the 



