STATE GEOLOGIST. 235 



TI. Notes o:n" some Mini^tesota Cladocera. 



Tribe I Ctenopoda. 

 SIDIDuE. 



Antennae of second pair with unequal rami, superior larger; last 

 joints compressed and setose ; intestine simple. 



Of this family two species are certainly identified in America, both 

 of which are abundant in certain favorable locations at the proper 

 seasons. No species of the Holopedidce are known to occur here. 



G^nus SID A Straus. 



Superior ramus of second antefinse three -jointed; posterior margin 

 of post-abdomen with numerous spines (20-30.) 



SiDA CRYSTALLiNA, Mliller. 

 (Fig. 3.) 



BibUog'*'aphy. 

 Daphne crystallina, Miiller. 

 Daphnia crystallina, Latreilk. Bosc. 

 Sida crj^stallina, Straus, Mem. Mus. Hist. Nat. 

 Sida crystallina, M. Edwards, Hist. Nat. Crust. 

 Monoculus crystallinus, Gmelin. Manuel. Fahvicius. 

 Monoculus elongatus De Geer, Mem. servir Hist. Ins. 

 Sida crystallina, Lievin, Branch, d. Danziger Geg. 



Baird, Brit. Entom. 



LiUjeborg, De crust, ex ord. trib. 



Fischer. 



Schodler, Die Branch, d. Umg. v Berlin. 

 Neue. Beitr. 



Ley dig, Naturg. d. Dajjh. 



SarSi Norges Ferskv — Krebsdyr. 

 elongata Sara '' ** " 



Sida CTjstallina, P. E, Mailer, Danmark's Cladocera. 



Kurz, Dodekas Neuer Cladoceren. 



Birge, Notes on Cladocera. 



Herrick, Microsc. Entom. 



Lutz, Untersuch, Li. d. Cladoceren d. Umg. v. Bern. 

 18T8. 



Weismann. 



