Bibliographical Notices. 403 
The DarwinvuLip2 are represented by Darwinula (1 sp.). 
The Cyrnerip# have Metacypris, B. & R. (1 sp.), Cythere, Miller 
(70 spp.), Limnicythere, Brady (4 spp.), Cytheridea, Bosquet (9 spp.), 
Eucythere, Brady (1 sp.), Krithe, B., C., & R. (5 spp.), Lowoconcha, 
Sars (7 spp.), Xestoleberis, Sars (4 spp.), Cytherwra, Sars (20 spp.), 
Cytheropteron, Sars (18 spp.), Bythocythere, Sars (8 spp.), Pseudo- 
cythere, Sars (1 sp.), Sclerochilus, Sars (1 sp.), Cytherideis, Jones 
(2 spp.), and Cytherois, W. Miiller (1 sp.). 
The Parapoxostomarmz comprise Paradoxostoma, Fischer (17 
spp.), and Macherina, nov. (2 spp.). 
Of all the foregoing, 61 are freshwater species and 188 marine. 
A Table at page 257 gives moreover the distribution of each of these 
in the different areas concerned, and indicates that 20 of the former 
and 99 of the latter (marine) occur in the Post-tertiary deposits. 
The numbers for the Tertiary occurrences will be about 3 for fresh- 
water and 27 for marine forms, if corrected more nearly by the 
‘ Supplemental Monograph of the Tertiary Entomostraca of England, 
by Jones and Sherborn, Palzont. Soc. 1889. 
The geographical distribution of each species is shown in the 
elaborate Table at pp. 250-256. 
The chief emendations of species are :— 
Bairdia formosa, ‘Challenger’ Report, p. 52, is B. subcircinata, 
sp. n., pp. 113, 240. 
Cythere Stimpsoni, ¢ Chall.’ Rep. p. 85, is C. runcinata, Baird, p. 160. 
irpex, ibid. p. 107, is C. echinata, Sars, p. 150. 
He ea Monogr. Rec. Brit. Ostr. p. 397, is C. confusa, nov., 
p- 127. 
laticarina, ibid. p. 412, is C. marginata, Norman, p. 142. 
Cytherura lineata, ibid. p. 441, 
affinis, ibid. p. 443, are O. cornuta, Brady, p. 192. 
— gibba, ibid. p. 444, 
— cuneata, ibid. p. 442, is C. sella, Sars, p. 194. 
Sarsit, ibid. p. 442, is C. similis, Sars, p. 203. 
Robertsoni, ibid. p. 444, is C. gibba, Miller, p. 190. 
Oytheropteron subcurcnatum, ibid. p. 447, is C. depressum, nov., 
p. 218. 
An Appendix (pp. 240-246) treats of the Ostracoda obtained in 
-the French Expeditions of the ‘ Travailleur’ and ‘ Talisman.’ 
Of the fifteen excellent quarto plates (drawn by G. 8S. Brady and 
lithographed by George West and Sons) illustrating this goodly 
Monograph four are devoted to the internal structure and organs of 
the minute bivalved Crustaceans herein dealt with; and in the last 
plate the characteristic limbs and soft parts of six of the genera 
(Darwinula, Pontocypris, Loxoconcha, Cytherura, Bythocythere, and 
Paradoxostoma) are exhibited in place within the valves. In very 
many of the descriptions and figures throughout this Monograph 
the sexes and sexual characters are carefully indicated. 
Besides the plates there are woodcut illustrations of several species 
at pages 88, 118, 241, 242, 244, 245, and 248, 
