l."it> I'Alil-; SKOfiSHKKC. 



Tho sootio (^ladoropa included a ,c;emis Polifcnpe that was quito unknown bcforo; tlio 

 softio P/dli/copa was based un a genus Ci/l/ierclla, previously known only ineonij)letely from 

 fossil specinions. The families were divided by this author directly into genera and species. 



(t. S. BR.M'V in Ills work 18(58 b adopts the above-menti(iiii'(l ciassificatiitn ol SAlis's; his 

 work is notewurtliv because uf the establishment dl a new I'amilv. Entomoconcliidae, comprisinf>; 

 two genera, Kulomoconchns and Heterodesmus. The cjuestion of the value of this family J shall 

 not discuss; T only wish to point out here that the genus Heierodesmus, which is placed l)y 

 ti. W. .Mi'LLi;!!, lt)l'J, among ,,()stracodum genera et species incertae 

 sedis'', may possibly be regarded as a typical Cypridinid genus; cf. the note below on 

 the sub-genus Siphonostra. EntomoconcJms is only known tioin fossil sj^ecimens. 



(J. (). Sai^s carried out a rather important iniproveincnt of his above-mentioned system 

 in his work on the Ostracods of the Mediterranean, 1887; in it he arranged the genera 

 Xesidea and Bythnciipris as a separate family within the group Podocnpa. 



Another important thing was the establishment of the family Darwimdidae as a new 

 unit within Podocopa (G. S. BRADY and A. M. NORMAN, 1889). 



Most of the investigators who have worked on this group have adopted unaltered the 

 fundamental principles for the Ostracod classification used by G. 0. Sars. (!. W. MdRLEI?, 

 however, adopted this system only in a modified form. In his large monograph, 1894, this 

 author classifies the Ostracods in the following way: 



Tribus I. Myodocopa, comprising the families (Jypridimdae, Halocypridae and Poh/copidae. 

 ,, II. Podocopa, „ ,, ,, Cijpridae, Nesideidae, Cytheridae, Cytherdlidae, 



a nd Da rnun iilidaf. 



In other words, of U. (). Sars' four st>ctions (J. W. Miil.LKR unites Cladocopa with Myodo- 

 copa and Platycopa with Podocopa. 



Only one author, C. Claus, entirely rejects the basis given by .1. D. I)a\a for the 

 Ostracod system. He looks upon the C y p r i d i n i d s, H a 1 o c y p r i d s, G y p r i d s and 

 Cytherids as equivalent families. See 0. Claus, 1876, p. 97 and 1891a, p. 6. 



G. S. Brady and A. M. Norman, 1896, who, like G. O. SAi«, look upon the P o 1 y c o- 

 p i d s and the C y t h e r e 1 1 i d s as groups systematically equivalent to Myodoqjpa and 

 Podocopa, classify Myodocopa in no less than five families: 



Family I. AMeropidae 

 II. Cypridinidae 

 ,. III. Rutidermatidae 

 „ IV. Sarsiellidae 

 „ V. Halocypridae*. 



In other words these authors do not, like G. W. MliLLER, look upon the H a 1 o c y p r i d s 

 as a group systematically equivalent to the P o 1 y c o p i d s and the ( ' y p r i d i n i d s , but as 



• This is the name that is used foi' this family on p. 6S2; in the beginning of the same work, houcvir. these 

 investigators use the name Conrhoeciitlae. see pp. 622 and 62.T. or (7onchoe(iailae. pp. 62" and 628. 



