Order: Ostracoda. 



For synonym y, see G. W. MCller, 1912, p. 1. 



Diagnosis and descriftion: — C'f. G. W. Mt'LLER, 1912, pp. 1 — 4. 



Historical: — C. VON LiNNE was the first to denominate scientifically a form belonging Linne. 



to this group of animals, and although still earlier investigators, even the Nestors of microscopy, 

 SWAMMERDAM and Leeuwenhoek, had already been occupied to some extent with the study 

 of Entomostraca — and in this could of course scarcely avoid coming across some species belonging 

 to the group in question — yet this master of science was, at least if we are to judge from 

 the results to be seen in the literature, the first to make an attempt, even though a gropinT 

 one, at a closer investigation and description of an s t r a c o d. — 0. F. MILLER states 

 in 1772 that H. Baker in his work ,,Microscope made easy", 1743, had already 

 mentioned an Ostracod; this statement is, however, due to a mistake. 



In his ,,F a u n a S u e c i c a", 1746, LiNNE gives on p. 344 a species called: ,,Monocidus 

 antennis capillaceis mtdtiplicibus, testa bivaJvi", with, one must admit, a very superficial de- 

 scription, and this form, certainly a Gyp rid, occurs again in the author's ,,Sy sterna 

 N a t u r a e", 10th ed. 1758, p. 635 and in „F a u n a S u e c i c a" of 1761, p. 498, under the 

 name of Monoculus conchaceus. In,,Systema Natura e", 1758, are also given two other 

 Ostracod species; these also presumably C y p r i d s, Monoculus lenticulans and 31. ielemus, 

 which are also only superficially described. 



Even in the later part of the 18th century we come across a number of works which Auihors of ihe la 

 mention, among other things, forms belonging to Ostracoda; examples are H. Baker, 1753, pnrt nj lUe isth 

 L. JOBLOT, 1754, M. F. Ledermuller, 1760, G. de RiMl.LE, 1760, N. PODA, 1761, E. L. <■«"'>"■!)■ 



Geoffrov, 1762, 0. F. MfJl.LER, 1772, 1776, 1785, C. de Gker, 177S, J. F. G.MELIN, 1788, 

 and B. E. Manuel, 1792. — Most of these comparatively numerous works, however, did little 

 ro nothing to increase the knowledge of this group of animals. Only 0. F. MOller's two last 

 works, especially ,,Entomostraca seu Insecta Testace a", 1785, an extensive 

 work for his time, indicate a real step forward. In the last-named work MCller gave two 

 genera, Cypris and Cythere, the former with eleven species living in fresh water, the latter with 

 five marine species. By this classification the foundation may be said to be laid for the great 



