166 GEOL. AND NAT. HIST. SURVEY OF MINNESOTA. 



I'article terminal, mesure a partir de I'extremite de la branchie; chez la femelle cette 

 meme patte est charaterisee par I'une des soies, qui s'est transformee en un batonnet 

 court et gros, cilie d'une fa^on particuliere. La conformation des autres pattes, dans 

 les deux sexes, presente egalement des characteres speciaux, difficiles a exposer sans 

 le secours du dessin on sans une longue description. La carapace eat marquee de 

 tubercules termines par des polls; les crochets dorsaux sont simples et limitent un 

 large espece qui prend la configuration d'un coeur quand la coquille est etalee. Les 

 crochets terminaux du post-abdomen portent au cote interne et vers leur base une 

 plaque dentee, et ils sont surmontes d'une dent unique; ils n'ont pas de peigne. La 

 femelle porte deux oeufs dans son ephippium." 



Daday mentions the following species, which are added provisionally: 



Moina salina Stephanow. 



Capite supra oculum impressione insigni, fornice indistincts; testa corporis fere 

 quadrangular!, margine anteriore ac inferiore setis perpaucis; antennis in mare apice 

 unguibus curvatis, majusculis 5; abdomine sine processu; cauda aculeis magnis 10 

 setosis armata, margine superiore tuberculis perparvis lateribusque setis minutis, in 

 series transversales bositis; unguibus caudalibus sine spenarum serie pectiniformi 

 margine anteriore processu dentiformi louge, usque ad medium setosis. Longit fem., 

 0.75 to 0.9 mm.; altit, 0.45 to 0.5 mm. 



Moina bauftyi Daday. 



Testa capitis setis tecta; testa corporis fere quadrangular], obtuse angulata, parte 

 postica supra duos processus curvatos formanti; antennis primi peris abique ciliatis^ 

 laminis quadrangularibus obtectis; cauda apicem versus attenuata; unguibus caudali- 

 bus curvatis, setosis. Longit. fem., 0.9 to 15 mm. 



GENUS MOINADAPHNIA Herrick. 1887. 



Head strongly arched above, angled in front of the eye, somewhat 

 beaked at the caudal end of the lower margin, near which are affixed 

 the slender antennules. Body quadrate, as in Daphnia. but merely 

 angled at the dorso-caudal angle. Post-abdomen elongate, armed as 

 in Moina. Brood sac occluded by strong abdominal processes. An- 

 tennte with a long unjointed spine from the apex of the last joint of 

 the four-jointed ramus, otherwise as in Moina. The first member of 

 this genus was found by L. E. King ('52 to '54) in New South Wales 

 and named Moina madeayii. The figure and description were repeated 

 by Schoedler ('77), but he does not suggest generic autonomy. 



*Momaclaphnia alabamensis Herrick. 



Plate XXXVI, Figs. 7-10. 



Herrick '87. 



As suggested in the original paper, this species not only affords a 

 needed transition between Moina and Dapknia but also forms a link 



