PALAEONTOLOGY OP NEW-YORK. 



The following list, in the order in which they are described, embraces 

 all the genera of Brachiopoda at this time known to me in the rocks and 

 groups previously noticed on the first page, and from which species are 

 described in this volume. 



LINQULA, 



DISCINA, 



CRANIA, 



PHOLIDOPS, 



ORTHIS, 



STREPT0RHYNCHU8, 



STROPHOMENA, 



8TR0PH0D0NTA, 



CHONETES, 



PRODUCTUS = PRODUCTELLA, 



SPIRIFERA, 



CYRTIA and CYRT^NA, 



TREMATOSPIRA, 



BHYNCHOSPIRA, 



BETZIA?, 



NUCLEOSPIRA, 



ATHYRIS, 



MERISTA, 



MERISTELLA, 



ATRYPA, 



C(ELOSPIRA, 



RHYNCHONELLA, 



STENOCISMA, 



LEIORHYNCHUS, 



LEPTOCCBLIA, 



CAMAROPHORIA, 



PENTAMERUS, 



PENTAMERELLA, 



GYPIDULA, 



AMPHIGENIA, 



RENSSELiERIA, 



TEREBRATULA, 



CRYPTONELLA, 



CENTRONELLA. 



TROPIDOLEPTUS, 



VITULINA. 



.*, There are one or two other genera, which may be ultimately included in 

 the list occurring in these formations. 



