History of British Entomostraca. 37 
ed. Since the time of Miiller, much has been done by our Conti- 
nental neighbours to add to our knowledge of these interesting little 
creatures. The works of M. Jurine, the father,* and Ramdohr,f 
have especially been successful in extending our acquaintance with 
the anatomy and economy of the Branchiopodes, but unfortunately 
their works are scarcely to be had in this country. The memoirs of 
M. Straus, upon the genus Daphnia and Cypris, contain the most 
excellent and most minute histories of these two genera, that can 
be met with ; and his researches, having been conducted with the 
greatest zeal and care, leave little to be done with regard to them by 
succeeding naturalists, but to add to the species. Jurine, (fils,) 
Daudebart de Ferussac, (fils,)|| Adolphe Brogniart,1F Hermann, 
(fils,)** M. Prevost,tt and MM. Milne-Edwards and Audouin,JJ 
have each contributed excellent memoirs on detached genera and 
species, and greatly enlarged our knowledge of the history of a num- 
ber of curious and most interesting animals. 
Whilst the Continental naturalists have been thus earnest in study- 
ing the Entomostraca, it is curious that no British naturalist that we 
know of, with the exception of the celebrated Dr Leach, has paid any 
attention to them. The memoirs of this excellent naturalist, with 
the exception of two, are for the most v part scattered over various 
French periodicals, and are chiefly directed to the history of some 
of the parasitic animals belonging to the division. In his article 
Crustacea, in the Edinburgh Encyclopaedia, he only enumerates six- 
teen species as found in Great Britain, a list which is increased by 
Samouelle in his " British Insects," to the number of twenty ; and 
* Histoire de Monocles qui se trouvent anx environs de Geneve. Geneve, 
1820, 4to. 
f Materiaux pour servir a 1' Histoire de quelques Monocles de I'Allemagne. 
| Memoires du Museum d' Histoire Naturelle, tome v. and vii. 
Memoire sur 1'Argule foliace. Annales du Museum d' Histoire Naturelle, 
tome vii. p. 431. 
|| Memoires sur deux Nouvelles especes d'Entomostraces. Ann. du Mus. 
d'Hist. Nat. tome vii. 
5 Memoire sur un Nouveau genre de Crustacea (Limnadia.) Mem. du Mus. 
d'Hist. Nat. tome vi. 
** Memoires Apterologiques, folio, Strasbourg, 1804. 
ff Memoir on the Chirocephalus, in the Journal de Physique, tome liv., at 
tbe end of Jurine sur les Monocles, &c. 
JJ Annales des Sciences Naturelles, tome ix. 1826. (Memoir on the Nico^ 
thoe.) Memoir on the Structure of Mouth in Siphonostomous Entomostraca, 
Ann. des Sciences Nat tome xxviii. 1833. 
Supplement to Encyclopaedia Britannica: Edin. Encyclopsed. Art. Crustacea. 
