similes on inariiic Ostracoils 



165 



By his work ,,U » t r a c u d a m e cl i t v v r a n e a", 1887, U. O. S.\l;.s also lielitud in 

 a high degree to make this group of animals knowii. This work together with (J. W. Muller's 

 big monograph of 1894 — especially the latter — are the publications that, broadly speaking, 

 may be said to have carried our knowledge of the forms belonging to this sub-order to its 

 present standpoint. Not only did the latter work, with its nmltitude of details, fill many ga])s 

 in our knowledge of the morphology of these animals, but in it, generally speaking, they were 

 treated, for the first and only time, from standpoints other than a purely morphological- 

 classificatory one; even their oecology was the subject of a rather thorough study. 



Of the other publications that deal with this group we may only mention here: 

 A. Garbini, 1887, in which Cypridina mediterranea O. C'OSTA was submitted to a morphological- 

 liistological investigation; the following organs were dealt with: the first antenna, alimentary 

 organs, central nerve system, sensory and sexual organs. It is quite a meritorious work. 

 C. Claus (1891 b) dealt with the median eye, A. Ramsch (1906) the female sexual organs in 

 Cypridina; L. LilDERS (1909) made a rather thorough study of the organisation of Gigantocypris. 

 The first to give a scientific name to and describe a species belonging to the sub-order 

 (yypridini formes was H. Milne Edwards in his treatises of 1838 and 1840. As is seen from 

 the historical summary given above this author distingiiished the new form from the 

 other then known recent Ostracods — divided into two genera, Cypris and Cythere — 

 by taking it as a representative af a new genus, Cypridina. W. Baird, i850a, separated the 

 then known forms of this group as a special family Cypridinadae, by the side of which he put 

 the families Cytheridae and Cypridae. C. Claus suggested, 1876 (p. 94, note 1)), tliat the genus 

 Asterope should be distinguished as a special family ,,d e r A s t e r o p i d e n" from other 

 genera of this group then known, namely Cypridina, Monopia and Phihmedes. G. S. BRAii'i 

 and A. M. Norman, 1896, divided the known forms of this group into four families: 

 Family I. Asteropidae with only one genus Asterope 



CrossophofUH 

 Cypridina 

 Philomedes 

 Streptoleberis 

 Tetragunodon 

 Farainekodon 

 Rutiderma 

 Eurypylus 

 Sarsiella 

 I Newalohamiiiu. 

 G. W. MiJLLER in his later works (1906 b, 1912) employs the following division of this group: 



Cypridina 



11. Cypridinidae 



Familv III. Kutidermatidae 



1\. Harsiellidae 



SIX genera 



onl\' one uei'ii^ 



three genera 



Sub-famil 



Cypridininae with five genei'. 



Pyrocypris 

 CrossopJtoras 

 Codonocera 

 Gigantocypris 



.Xiiliirot si/.-itnii. 



