INDEX 



Note. — The first reference to each of the species described gives the page 

 upon which the description begins and the figure references. References to 

 the description of certain parts or features of a species are only given in the 

 index if the description occurs outside of the detailed description of the 

 species. For instance: the description of the pygidium of a certain species 

 will be found in the description of that species and there will be no specific 

 reference in the index to the pygidium unless it is described or discussed at 

 some other point in the paper. 



The list on pages 351-371 may be regarded as a completely cross-referenced 

 index to the synonymy of the Mesonacidse, and only the actual references as 

 they occur in the synon}rmy will be found in this index. 



abuonnis, see Hucnclla. page 



Acknowledgments 234 



Acritis, compared with Obolns {Mickzvitzella) 70 



evolution of pi. n (pp. 140-141) 



see Obolns {Acritis). 



Acrothele, classification of 142, 146 



compared with Acrothele (Redlichella) 90 



Botsfordia 90 



evolution of pi. 11 (pp. 140-141) 



mentioned 77, 82, 88, 89 



Pompeckj, in synonymy 77 



artemis, new species 82/ pi. 8, fig. 10 



compared with Acrothele prima costata 82 



stratigraphic position and association 198 



bellapuiictata, new species 82, pi. 8, figs. 9 and ga 



compared with Acrothele (Redlichella) gramdata S3 



Microniitra (Iphidclla) pannula 83 



bergeroni, new species 83, pi. 8, fig. il 



compared with Acrothele bohemica 84 



Acrothele coriacea 84 



Acrothele quadrilineata ; 84 



mentioned 77 



bohemica, compared with Acrothele bergeroni 84 



borgholmensis, new species 84, pi. 8, fig. 12 



associated fossils listed 85 



compared with Acrothele turncri 88 



collcni, compared with Micromitra (Pateriiia) zvapta 59 



mentioned 21, 22 



stratigraphic position and association 202, 213, 214 



^ The number in heavy-faced type refers to the page upon which the species 

 i described. 



433 



