480 Keport of the State Geologist. 



Family Acrogenidae, nov. fam. 



AOROaENIA.. DiCKANOPORA. GoNIOTKYPA. 



Family Clathroporidse, nov. fam. 

 Clathropoka. 



Family Thamnotrypidae, nov. fam. 

 Thamnotrypa. 



Family Arthrodemidae, nov. fam. 

 Arthoolema. Eelopora. Septopora. 



Family Rhomboporidae, nov. fam. 

 Batostomella. Cjeloconus. E-hombopora.. 

 Trematella. 



Family Streblotrypidae, Ulrich emend. 

 Callotrtpa. Streblotrypa. 

 Bythopora. 



Family Rhabdosemonidae, Vine, emend. 



ACANTHOCLEMA. NeMATAXIS. 



Family Bactroporidae, nov. fam. 



BACTROPORi. NeMATOPORA. 



Family Chilotrypidae, nov. fam. 

 Chilotrypa. 



Family Phaceloporidae, Ulrich. 

 Phaoelopora. 



Family Worthenoporidae, Ulrich. 



WORTHENOPORA. 



Suborder CYCLOSTOMATA. 

 Family Fistuliporinidae, nov. fam. 



CCELOCATJLTS. FiSTULIPORIDRA. FiSTULlPORINA. 

 PmACOTRYPA. 



