404 Bibliographical Notices. 



Altogether this completely revised and augmented Monograph of 

 the Podocopal Ostracoda of the north-western regions of the Northern 

 Hemisphere adds greatly to the credit of the authors, well kuown 

 for their industry, acumen, and extensive biological knowledge, of 

 the lower Crustacea in particular. The care with which they have 

 noted the helpful labours of their fellow -workers gives additional 

 value to the results of their own researches. 



A Supplementary Monograpli of tJie Tertiary Entomostraca of 

 England. By T. Rupekt Jones, F.R.S., &c., and C. Daties 

 SnERBORN, r.G.S. Palceontographical Society of London. 4to. 

 55 pp. 3 plates. 1889. 



In 1857 a Monograph on the Tertiary Ostracoda of England was 

 published by the Palceontographical Society, and some revision of 

 the species was given in the ' Geological Magazine ' of 1870 by 

 Prof. Eupert Jones. Then the Post-tertiary Entomostraca of Scot- 

 land, England, and Ireland appeared iu an elaborate Monograph 

 (Pala)ont. Soc.) by Brady, Crosskey, and Robertson, in 1874. . Fur- 

 ther Tertiary species were published in the Geol. Mag. of 1874 by 

 Jones and Sherborn ; and all the known Tertiary species of England, 

 with such of the Post-tertiary forms as had already been noticed in 

 the Monograph of 1857, are now revised, redescribed, and refigured 

 as far as may be necessary in the new Supplementar)' Monograph. 



The Table at pp. 49-51 indicates 120 species and notable varieties 

 of Ostracoda treated of in this Monograph, 4 ranging from the Cre- 

 taceous upwards to the Eocene ; 5 in the Woolwich and Reading 

 beds, one of them going up even to Recent times ; 20 in the London 

 Clay, a few of them ranging somewhat higher, but one not distin- 

 guishable from the recent Erithe glacialis ; 17 from the Bracklesham 

 Beds, a few of them repeated in the Barton and Headon Beds ; 7 

 others in Barton Beds, 2 reoccurring in the Hcadou Beds and Kriilie 

 harionensis even in the Post-tertiary and Recent ; 7 belong to the 

 Headon Beds, besides some already referred to. The Osborne, Bern- 

 bridge, and Hamstcad Beds have 7 species, mostly of freshwater or 

 brfickish habits, one of them (Cypris gihha) living on to late Pliocene 

 and Recent times, and one (Cypridea spinigera) from Hamstead 

 undistinguishable from a Wealden species. The White Crag of 

 Suffolk gives 19 species, three going up to the Red Crag and three still 

 higher, one of them (Cythere convexa) to existing seas. The Red 

 Crag has three other species, two of which reoccur even among 

 Recent forms. The Norwich Crag has 8 species, mostly peculiar, 

 except the Recent Cytheridea punciillata. From the Weybourne 

 Crag 15 species and varieties have been obtained (chiefly by Mr. 

 Clement Reid, F.G.S.), of which about half range upwards to Post- 

 tertiary and Recent times. Pour or five Post-tertiary species, found 

 also in the Recent state, come into the list as having been described 

 in the original Monograph in 1857. 



The elaborate Monograph by Brady and Norman on the British 

 and North-western European Ostracoda, published contempo- 



