228 
Revieus — The Palceontographical Society. 
textnre, markings, and kingement of the valves, at pages 109-114, 
and tke synopsis of tkeir genera, based upon the anatomical 
cbaracters of the animal, at pp. 115 and 116, will be higkly accept- 
able to the students both of recent and of fossil specimens ; and 
indeed these admirable synopses are full 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 inkabitants of fresh or slightly 
brackisk water, the remaining 108 being strictly marine species.” 
The fresliwater species are as follows : — 
Cypris cinerea , Brady. 
compressa, Baird. 
gibba , Ramdohr. 
ovum, Jurine. 
reptans , Baird. 
salina, Brady. 
virens, Jurine. 
Icevis, Müller. 
Cypridop*is Neictoni, B. & R. 
obesa , B. & R. 
Candona albicans , Brady. 
candida, Müller. 
Candona compressa, Koch. 
detecta, Müller. 
lactea, Baird. 
Potamocypris fulva, Brady. 
Darwinelia Stevemoni, B. & R. 
Limnicytheie antigua, n. sp. 
inopinata, Baird. 
monstrißca, Norman. 
Sancti-Patricii, B. & R. 
Cytheridea lacustris, Sars. 
torosa, Jones. 
Loxoconcha elliplica, Brady. 
All except Limidcythere antigua 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 ckaracterizing 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 whick 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 otliers 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 beneatli the Boulder- 
clay, 'and either Preglacial, Interglacial. or Glacial, without kaving 
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 seatn 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 
