228 Reviews — Henry Woods — Cretaceous Mollusca. 



the Courlande. In the reefs found in the Palaeozoic rocks, as 

 exemplified by the Carboniferous of Belgium, Devonian of Germany 

 and Poland, and the Silurian of Gotland, the Zoantharia [Ritf/osa of 

 the Palaeozoic rocks) play a less important part than they do at the 

 present day. The main constituents of these Palaeozoic reefs are 

 Stromatoporoidea, and next to them in importance come the Tahilata, 

 and lastly the Rugosa. Reefs which are entirely composed of rugose 

 corals are unknown. 



M. Yakowlew has discovered reefs formed exclusively of Stromato- 

 poroidea in tlie Devonian of the Courlande, and reefs made up for 

 the most part of Stromatoporoidea in the Carboniferous of the Timau. 

 The reefs found in the Middle Devonian of Poland are formed of 

 Stromatoporoidea, together with some Rugosa and Tahulata, while 

 less extensive coral masses composed essentially of Tahulata are found 

 in the Upper Devonian. 



An examination of the views of Grabau and Vaughan on the coral 

 reefs of the Palaeozoic rocks, chiefly American, leads M. Yakowlew 

 to the opinion that the conclusions of these authorities on the subject 

 of the analogy of the coral reefs of the Palaeozoic and posterior 

 epochs are not confirmed by the facts that they (j^uote. He does not 

 see any analogy between the ' knoll-reefs ' of Grabau and of 

 Tidemann [Tiddeman] and the reefs of the present day. The view 

 expressed by Bonney that conditions other than those of the present 

 time might have influenced the formation of reefs in the Palaeozoic 

 period appears to him to be more acceptable. 



I. T. 



VIII. — A Monograph of thk Cketaceous Lamellibranchia of 

 England. ]3y Henry "Woods. Palaeontographical Society, 

 1899-1913. 14 parts, making 2 vols. 4to;"pp. i-xliii, 1-232, 

 42 plates ; pp. 1-473, 62 plates. 

 rpHE completion of so monumental a work demands more than 

 _L a passing notice. Mr. Woods has given us a reference book of 

 the utmost value for the identification of our Cretaceous fossils. The 

 valuable bibliography and the excellent and full synonymies must 

 lighten the labours of all future workers and give a final opinion on 

 all questions of nomenclature. Throughout the whole work there is 

 evidence of the utmost care, although in the last part signs are not 

 wanting of weariness in the very brief account of the Radiolitidae 

 and the paucity of the " Additions ". There are still a number of new 

 things in public and private liands awaiting description, and perhaps 

 Mr. Woods may be induced to return to them after a brief rest. The 

 Gasteropoda and the Cephalopoda now want tackling to round off 

 the Molluscan fauna of the English Cretaceous. 



The illustrations have maintained a high standard throughout the 

 work, and in tlie two groups of the Inocerami and the Ostraeidae the 

 Council of the Palaeontographical Society has with wise generosity 

 allowed Mr. AVoods remarkable freedom. We therefore see not only 

 one specimen of each species properly figured but whole series of each 

 species displayed, sliowing all the varieties of sliape tliat the species 

 exhibits. It is therefore now possible to determine nearly all the 



