MAGAZINE 
OF 
ZOOLOGY AND BOTANY 
ORIGINAL COMMUNICATIONS. 
I. The Natural History of the British Entomostraca. By WILLIAM 
BAIRD, Surgeon. Plates VIII. IX. X. ( Continued from p. 41.) 
IN my former paper, I gave a short general history of the tf En- 
tomostraca," a brief account of the authors who have noticed them 
particularly ; and some general observations on their habits and 
manners. I also mentioned some of the various systematic arrange- 
ments which have been adopted by different authors, and stated the 
uncertainty which still exists as to their proper arrangement in a 
general system. In particular I described the arrangements of La- 
treille in the last edition of Cuvier's Regne Animal, and of Milne 
Edwards in his late work on the Crustacea, which latter I proposed 
adopting. The second volume of M. Edwards's work, however, in 
which the Entomostraca are to be treated of, not having yet been 
published, it will be necessary to follow Latreille's method in de- 
tail ; and thus the first genus which I shall give a monograph of, 
is the genus " Cyclops :" 
Class. CRUSTACEA. Division, ENTOMOSTRACA. 
Ord. BRANCHIOPODA Section, LOPHYROPA Group, CARCINOIDA. 
Genus, CYCLOPS.* 
Bibliographical History The first notice of any animal of this 
genus that I am aware of, is to be found in a little work of Stepha- 
nus Blancardus, the " Schou-burg der Rupsen, Wormen, Ma'den, 
&c.," published at Amsterdam, in 1688. His notice of it, however, 
* " Class, Crustacea ; Sub- Class, MaxillSs ; Legion, Entomostraca; Order 
Copepodes." Milne Edwards. 
NO. IV. X 
