354 REV. A. M. NORMAN AND MR. G. S. BRADY 



XXXII. — A Monograph, of the British Entomostraca belonging to 

 the Families fiosminidce, Macrothricidce, and Lynceidae. By 

 the Rev. A. M. Norman, M.A., and G. S. Brady, M.B.C.S., 

 C.M.Z.S. (Plates XVIII-XXIII.) 



A wide field of research, lies open to the British naturalist, in a 

 more careful examination than has hitherto been made, of the 

 smaller Crustacea inhabiting our seas, and the inland waters of 

 our ponds, tarns, and lakes. Our own investigations have been 

 most amply repaid by the constantly recurring pleasure afforded 

 by the discovery of some fresh form — often one little expected — 

 the representative of some genus which presents us with an en- 

 tirely new type of structure. In the present paper we propose 

 to describe the Entomostraca belonging to three very interesting 

 families — the Bosminidse, the Macrothricidse,* and the Lynceidae. 

 Since the publication of Dr. Baird's "Natural History of the 

 British Entomostraca," in 1850, many valuable memoirs and 

 works, which throw light upon the little animals we are about 

 to describe, have been published on the Continent. S. Eischer, 

 Lilljeborg, Leydig, Schoedler, and Gr. 0. Sars, have all contri- 

 buted their quota of information : and yet some of these authors 

 have, as regards synonymy, added to confusion by their works 

 rather than cleared it up. In Leydig's account of the Lynceidae 

 hardly any of the species described have the right names assigned 

 to them, and on the other hand, SSchoedler appears to have laid 

 down for himself a rule, that if two persons had described ani- 

 mals under different names those animals must be distinct, and 

 his " Neue Beitrage der Naturgeschichte der Cladoceren" thus 

 presents us with an endless multiplication of species. We have 

 taken great pains in the following pages to clear up the present 

 confused synonymy of the species : we cannot expect to have been 

 in all cases successful, but any want of accuracy in this respect 

 will certainly not be attributable to want of care. We have, 

 however, confined our references to such memoirs as have been 



* Sars' name for this Family " LyncodaphnidaV' not being derived from the typical 

 genus of the Family, in accordance with the usually received rules of nomenclature, we have 

 substituted for it that here employed. 



