studies on niarinn Ostracods 1J^9 



So far seven* genera of this group have been established, namely: 



Cypridina, H. MiLNE Edvvards, 1840. 



Monofia**, V. Claus, 1873. 



Crosso'phorm, Gr. S. Brady, 1880. 



Pyrocypris, G. VV. MOl.LER, 1890 ( = = Eupatlmtomu, G. 8. Brad^', 1898. p. 4:i7). 



Gigantocypris, O. W. Mt'LLER, 1895. 



Codonocera, (i. S. Bl;Ar)^ , 1902 a. - 



Cypridinodes, G. S. BRAn> . 1902 a. 



Of these it seems as if the genera Crossophorm, Gigantocypris and Codonocera may 

 without hesitation be characterized as natural classificatorv units, well defined from 

 each other and from other genera, as has already been jjointed out by G. W. .Mri.LKR, 

 1906 b, pp. 12 and 13. 



The genus Pyrocypris (= Cypridina, s. str., et s. meo) comprises a rather large number 

 of very closely related species. These species are presumably more closely related to the forms 

 that have been grouped by G. W. MUller under the name of Cypridina than are the three 

 above-mentioned genera Crossophorus. Gigantocypris and Codonocera. This does not, however, 

 prevent their breaking-out as a higher systematic unit from being considered as quite 

 justified. G. W. MCLler himself seems, however, to have had doubts as to the correctness 

 of establishing this genus; he writes on this ])oint. 1906 b, p. 13, as follows: „Die Gattung 

 Pyrocypris .... steht der Gattung Cypridina s. str. viel naher als die genannten" (Crosso- 

 phorus, Gigantocypris and Codonocera), ,,man kann in Zweifel dariiber sein, ob nicht manche 

 Vertreter von Cypridina ihr niiher verwandt sind als anderen Vertretern dor Gattung, und ob 

 ihre Abtrennung die natiirliche Verwandtscihaft zum Ausdruck bringt." Then he adds: ,.Auf 

 jeden Fall vereinigt sie eine groBere Zahl nahe verwandter Form. liilJt sich audi scharf 

 characterisieren." — In his last large synoptic work on the Ostracods, l'»12. this 

 investigator certainly quite correctly retains this unit, in spite of this doubt of his. In the 

 present work I have followed him in this procedure with the exception that the group in 

 question has been considered a sub-genus of the genus Cypridina***. 



Of the three remaining genera, Cypridina, Monopia and Cypridinodes, (i. \\ . .Mi'l.l.ER 

 always rejects the two latter; all three are imited by this author under the generic name Cypri- 

 dina. He gives the following reasons for this method of procedure of his (1906 h. p. 13): 

 ,, Anders ist es bei den folgenden Gattungen: Monopia Clals charakterisirt durch das umfang- 

 reiche Frontalorgan. Beriicksichtigen wir nur das Frontalorgan, so reiBen wir niichst verwandte 

 Formen, wie z. B. C. flareola Clai s und funis BliAliV -- Cypridinodes farus Br.VDV auseinander. 

 Brady hat 1. c. die Gattung Cypridinodes aufgestellt, doch beruht seine Gharakteristik ganz 

 oder fast ganz auf Beobachtungsfehlern: an tier Maxille sind die audi bei anderen Vertretern 

 der Gattung Cypridina kurzeii Kaufortsiitze der .Ma.xille abgerissen, der schlanke Maxillartaster 



* With regard to tiit^ genus Ifclrrmlfsmus, G. S. I!hai>y. I.St'.S h. if. below under the siib-genu.s Siphonnslra. 

 ** In a later work, 1891 1), note p. 10 C. Ci.At s altered this name to Eumimnpia ,.da Li niiocK bereiis friiher 

 eine P o n t. e 1 1 i d e n-Gattung Mnnops genanni halte". There seems lo me lo be no n-ason for following this ehangi" 

 of name. 



**• With regard to the name of this snb-genns see below p. Uli. 



