144 



NEW YORK STATE MUSEUM 



but instead of having the pygidium of those species, which is 

 beHeved to be marked with a long terminal spine and irregularly 

 pustulose surface, its caudal plate approaches more nearly that 

 of D . m i c r u r u s of the same fauna. Fragments of this 

 species are very abundant and some indicate a size greater 

 than that attained by any known species of the genus and indeed 

 by any known trilobite except the colossal U r a 1 i c h a s 

 r i b e i r o i from the Silurian of Portugal. Restorations from 

 these fragments show that D. perceensis attained a 

 length of 25 inches. It is the only species of the genus present 

 in the fauna. 

 Phacops logani Hall. A Helderberg and Oriskany species in New 



York 

 To indicate our present knowledge of the distribution of this 

 fauna, its relation to that of the Grande Greve limestones and the 

 composition of the latter I subjoin the following tabulation to whicli 

 have also been added the species of the marine fauna of the Gaspe 

 sandstones as developed about Gaspe Basin. 



List of Gaspe Devonic fossils 



Glossina acer nov 



Lingula elliptica nov 



L. spathata Hall 



L. rectilatera Hall 



Orbiculoidea cf. grandis Hall. . 



O. sp 



Pholidops terminaHs Hall 



P. cf. ovata Hall 



Crania pnlchella Hall & Clarke. 



C. grandegrevensis nov 



Dalmanella lucia Billings 



Rhipidomella lehuquetiana nov.. 



R. logani nov 



R. musculosa Hall 



R. sp 



Schizophoria amii nov 



GRANDE GREVE 

 LIMESTONES 



All localities on 

 north shore of 

 Gaspe bay 

 from Little 

 Gaspe (con- 

 tact with 

 Gaspe sand- 

 stone) to 

 Shiphead 



PERCE ROCK 



GASPE SAND- 

 STONE 



