184 Reports and Proceedings — Geological Society of London. 



In the present work the author's suppression of certain species 

 is, ■we trust, done with sufficient justification. It is a proceeding 

 which should be carried out with the utmost caution, because, 

 however inconvenient a multitude of species may be to the 

 systematist, their presence is a lesser evil than that which may 

 result from the loss of information respecting the mutations which 

 groups of individuals undergo, and which are best recorded and 

 stereotyped under a specific or varietal name. The disadvantage 

 of burying such records, so to speak, is of course very much lessened 

 when there is abundance of material at the disposal of the 

 paleontologist, in which case transition forms may be found to 

 bridge over the gaps and to unite what had before been mistaken 

 for independent forms. The following genera are included in this 

 Eevision : — 



Favosites. 



Alveolites. 



Ccenites. 



Cladopora. 



Michelinia. 



Striatopora. 



Trachypora. 



Calapoecia. 



The illustrations are few, and though excellent, considering the 

 mode of reproduction adopted, are more suitable for the text than 

 for plates. The details, doubtless most faithfully rendered in the 

 original drawings, are in some instances reproduced on too small 

 a scale to give satisfactory results. Moreover, we miss represen- 

 tations of the entire corallum, which is inserted only in one instance 

 (pi. V, fig. 4, ^ nat. size). Apertures of corallites, sketched in 

 outline, with the tubular parts from which they proceed omitted, 

 have a strange and unnatural appearance (plates i and iii). 



We cannot commend the practice adopted by the author of 

 employing two terms of measurement — one for the corallum, in 

 inches ; the other for the individual corallites, in millimetres. 



This work will be of especial value to students of the Pala30zoic 

 corals of North America, while other palaeontologists may learn 

 much that is interesting respecting variations in structure, both 

 external and internal, so minutely and carefully recorded by 

 Mr. Lambe from the rich material at liis command. 



Arthur H. Fooed. 



I2,:E]I=»0I2,TS -A-lsTZD I'I^Oa:E:BXDI2^a-S. 



Geological Society of Londoic. 



February 16th, 1900.— W. Whitaker, B.A., RK.S., President, in 



the Chair, 



Annual General Meeting. 



The Secretary read the reports of the Council and of the Library 



and Museum Committee for the year 1899. In the former the 



Council referred to the continued increase in the number of Fellows 



and the steadily maintained financial prosperity of the Society. 



