lofi TAOE SKOOSBKRC. 



The sectio Cladocopo included a genus Poli/cope that was quite unknown before; the 

 sectio Platycopa was based on a genus Cytherella, previously known only incompletely from 

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



G. S. Brady in his work 1868 b adopts the above-mentioned classification of Sars's; his 

 work is noteworthy because of the establishment of a new family, Entomoconchidae, comprising 

 two genera, Entomoconchns and Heterodesmus. The (juestion of the value of this family I shall 

 not discuss; I only wish to point out here that the genus Heterodesmus, which is placed in' 

 (4. W. Mt'LLRR, 1912, among ,,Ostracodum genera et species incertae 

 s e d i s", may possibly be regarded as a typical ('ypridinid genus; cf. the note below on 

 tlie sub-genus Siphonostra. Entomoconchns is only known from fossil specimens. 



(t. O. Sxiis carried out a rather important improvement of his above-mentioned system 

 in his work on tlie (* s t r a c o d s of the Mediterranean, 1887; in it he arranged the genera 

 Nesidea and Bythocypris as a separate family within the group Podncopa. 



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

 unit within Podocopa (G. S. Brady and A. M. Norjian, 1889). 



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

 fundamental principles for the Ostracod classification used by G. (). Bars. G. \V. Mi'LLER, 

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

 author classifies the Ostracods in the following way: 



Tribus T. Myodocopa. comprising the families Cypridinidae, Halocypridde and Polycopidue. 

 ,, IT. Podncopa. .. „ ,, Cy/in'dar, Nesideidae, Cytheridae, (Jythere/lidac, 



and Ihiririnididac. 



In other words, of G. O. Sa1{S' four sections G. W. .MClm;i; unites Cladocopa with Myodo- 

 copa and Platycopa with Podocopa. 



Only one author, C. ('LAUS, entirely rejects the basis giveii \>y J. D. 1)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 

 Gy the rids as equivalent families. See G. Glaus;, 1876. p. 97 and 1891a, p. 6. 



G. S. Brady and A. M. Norman, 1896, who, like (i. (). Sars, look upon the P o 1 y c o- 

 pids and the Gyt her ell ids as groups systematically eciuivalent to Myodocopa and 

 Podocopa, classify Myodocopa in no less than five families: 



Faniil}' I. Asteropidae 

 „ II. Cypridinidae 



„ III. Rutidennatidae 

 ,, IV. Sarsiellidae 



v. Halocypridae*. 



In other words these authors do not, like G. W. Mfll-RER, look upon the Halo c y p r i d s 

 as a group systematically equivalent tt) the 1' o 1 y c o p i d s and the G y p r i d i ii i d s . but as 



* This is till' iiaiiii' tlial is visi'il fur lliis raiiiilv uii p. lix^: in llic bfiiiruiiiig of Iho same work. Iiowt'vi'r'. Iliese 

 invfstifiator.s iisi' the naiili' CutirliDPciitlae. sec |i|i. tVl'l and tViri. or ('(luclmeiintlae. pp. (V27 and f>"J8. 



