I 



ABT. 4 CAMBRIAN CONCHOSTRACA — ULRICH AND BASSLER O 



Family INDIANIDAE, new family 



Indiana Matthew; Lower and Middle Cambrian. 

 Dielymella, new genus; Lower and Middle Cambrian. 

 Mononotella, new genus; Lower Cambrian. 



Family LIMNADIIDAE Baird 



Estheria Ruppel; Devonian-Pleistocene. 

 Leia Jones; Carboniferous of Europe and North America. 

 Estheriella Weiss; Permian of Russia and Saxony. 

 Schizodiscus Clarke; Middle Devonian of New York. 

 Lepiditta Matthew; Lower and Middle Cambrian. 

 Fordilla Walcott; Lower Cambrian. 

 Modioloides Walcott; Lower Cambrian. 

 Lepidilla Matthew; Middle Cambrian. 



Superorder MALACOSTRACA Latreille 



Order PPIYLLOCARIDA Packard 



Suborder Hymenocarina Clarke 



Hymenocaris Salter; Cambrian. 



Anomalocaris Whiteaves, Hurdia, Tuzoia, Odaraia, Fieldia, Carnar- 



vonia, and Waptia all of Walcott from the Middle Cambrian of 



British Columbia. 



Suborder Ceratiocarina Clarke 



Ceratiocaris McCoy, Nothozoe Bp^rrande; Ordovician, etc. 

 Caryocaris Salter; Cambrian, Ordovician. 



Suborder Discinocarina Clarke 



Shajferia Walcott; Cambrian. 



Aptychopsis Barrande; Cambrian, Ordovician. 



The following section shows the sequence of formations in Cape 

 Breton and New Brunswick, the correlation of the zones distin- 

 quished by Matthew with the Walcott locality numbers as described 

 in his Cambrian Brachiopod Monograph, and the fauna of Concho- 

 straca in the various zones. 



SECTION, GIVING FORMATIONS WITH FAUNAS OF CONCHO- 

 STRACA CAPE BRETON AND NEW BRUNSWICK 



Canadian: 



Upper Bretonian (Matthew, 1903). 

 Division C3c2 (Asaphellus zone). 

 Division C3c {Didyonema zone). 



