﻿228 Reviews — The Palwontogrcq^hical •Society. 



texture, markings, and hingement of the valves, at pages 109-114, 

 and the synopsis of their genera, based upon the anatomical 

 characters of the animal, at pp. 115 and 116, will be highly accept- 

 able to the students both of recent and of fossil specimens ; and 

 indeed these admirable synopses are fall of the latest information, 

 derived from the researches chiefly of Dr. G. 0. Sars, of Norway, 

 and Dr. Brady himself. 



" Of the 132 species of Ostracoda described in this Monograph, 24 

 may be considered to have been inhabitants of fresh or slightly 

 brackish water, the remaining 108 being strictly marine species." 

 The freshwater species are as follows : — 



Cypris cinerea, Brady. 



compressa, Baird. 



gibba, Ramdohr. 



ovum, Jurine. 



rep fans, Baird. 



. salina, Brady. 



virens, Jurine. 



l(e'vis, Miiller. 



Ci/pridopsis Newtoni, B. & R. 



— obesa, B. & R. 



Candona albicans, Brady. 

 Candida, Miiller. 



Candona compressa, Koch. 



detecta, Miiller. 



lactea, Baird. 



Fotamocypris fulva, Brady. 

 Danviriella Stevensoni, B. & E. 

 Limnicytheie, antiqua, n. sp. 



inopinata, Baird. 



monstrifica, Norman. 



Sancti-Fatricii, B. & R. 



Cytheridea lacustris, Sars. 



torosa, Jones. 



Loxoconcha ellipitica, Brady. 



All except Limnicythere antiqua are known in the living state. Of 

 the marine forms found in the Post-Tertiary beds there are lists 

 given, — 1. Of those now known as characterizing the Arctic seas 

 and the northern coasts of Norway, Scotland, and America. 2. Those 

 now extinct, or unknown in the living state. 3. Those found in the 

 Glacial and Post-Glacial deposits of Norway. 4. Those found in the 

 Glacial (and Post-Glacial ?) deposits of Canada. 



The Introduction of this Monograph (pp. 1 — 108) is essentially 

 geological, being descriptive of the numerous Post-tertiary clays and 

 sands associated with the beds which have yielded the Ostracods 

 under notice. In fact this portion of the work is a Monograph on 

 the Post-tertiary beds of Scotland and the north of England, with 

 notices of others beyond those limits. After a definition of terms, 

 our authors proceed to describe : 1. The local varieties of Boulder- 

 clay, both with and without fossils (pp. 3 — 10); 2. The varieties of 

 fossiliferous deposits, not being Boulder-clays and not Post-Glacial 

 (■pp, 11 — 25); these may be (a.) "immediately beneath the Boulder- 

 clay, and either Preglacial, Interglacial, or Glacial, without having 

 any Boulder-clay for their base ;" (b.) " between masses of Boulder- 

 clay ;" (c.) " clays, sands, and gravels characterized by a fauna more 

 or less intensely Arctic ;" (d.) " clays and sands, characterized by an 

 Arctic fauna, either immediately overlying Unfossiliferous Boulder- 

 clay, or separated from it by a thin seam of ' Laminated Clay.' " 

 3. The Ostracodiferous beds (pp. 25—92): A. "characterized by an 

 Arctic fauna ;" B. " the characteristics of the Arctic-shell beds,"— not 

 necessarily belonging to one age, and fluctuations of climate may 

 have taken place ; the difference of these Arctic beds summarized ; 

 C. " series of beds of later date, and not in any way Arctic, indicating 

 the steps through which the present physical geography of Scotland 



