EDITORIAL 21 



II. STENOCAMPYLI. 



2. Opp[elidae], Heb[etoxyitidae], Liss[oceratidae], 



Strig[oceratidae], Cly[doniceratidae]. 

 i. Cad[oceratidae]. 



I. PLATYCAMPYLI. 



3. Amalthacea : Amal[theidae], with sub-fam. Sonfnininae]. 

 2. Liparoceratacea : Lip[aroceratidae]. 



1. Ammonitacea : Hild[oceratidae], Ech[ioceratidae], 

 Amm[onitidae], Cym[bitidae]. 



The " hemeral range " in Table III refers only to the species 

 figured in this work. 



Some of the new generic and trivial names given by Buckman, 

 Neaverson and Spath to ammonites of Holcosphinctean, Allovirgatitan 

 or Paravirgatitan age may prove to be synonyms of names given by 

 Ilovaisky in a Russian paper of 1917, of which no copy exists at present 

 in England. 



Had unlimited space been available, an additional table might have 

 been added, giving a full list of the figured species under each genus. 

 This has been considered unnecessary, since, of the 407 genera illustrated, 

 223 are represented by only one species, and 120 more by several species 

 all referred to the same hemera, under which a full list will be found 

 in the chronological table. The remaining 64 genera are of longer 

 range, and in their case reference to Table III, under " Range," will 

 show the limits within which all the species will be found listed. 

 Alternatively, the fifth and sixth columns in the same table give the 

 full list of figured species by numbers, and direct reference can be made 

 to the plates. 



Tables IV, V and VI call for no comment. 



The Editor acknowledges the valuable help received from various 

 friends towards the compilation of these tables, and particularly from 

 Dr. L. F. Spath, Dr. A. E. Trueman and Mr. J. W. Tutcher. 



