SYNONYMIC LIST OF SFECTES. 63 
tive zooecium and the vestibule, a blunt superior hemiseptum is sometimes developed, and 
(4) the investibular spaces are filled by a dense, horizontal, laminated tissue. The orifice 
is about 0.2 mm. in diameter, and counting along one of the spiral rows, 6 are found in 2 mm. 
Occurrence. — Abundant at Lockport, Rochester, Lewiston, Niagara Falls, and other New 
York localities; also at Hamilton and Grimsby, Ontario. 
Catalogue number, 35759, U. S. National Museum. 
SYNONYMIC LIST OF SPECIES. 
Acanthoclema asperum (Hall). 
Allonema waldronense Ulrich and Bassler. 
Ascodictyon radiciforme Vine. See Vinella radiciformis. 
Ascodictyon siluriense (Vine). 
Ascodictyon stellatum var. siluriense Vine. See Ascodictyon siluriense. 
Aulopora consimilis Lonsdale. See Berenicea consimilis. 
Batostomella 'i aspera Nickles and Bassler. See Acanthoclema asperum. 
Batostomella granulifera (Hall). 
Berenicea consimilis (Lonsdale). 
Berenicea elegans Nickles and Bassler. See Berenicea consimilis. 
Berenicea membranacea Nickles and Bassler. See Berenicea consimilis. 
Bythopora spinulosa (Hall). 
Callopora aspera Hall. See Lioclema asperum. 
Callopora clausa n. sp. 
Callopora elegantula Hall. 
Callopora florida Hall. See Nicholsonella florida. 
Callopora laminata Hall. See Fistulipora laminata. 
Callopora magnopora Foerste. 
Callopora nummiformis Hall. See Mesotrypa nummiformis. 
Calloporella? nummiformis Ulrich. See Mesotrypa nummiformis. 
Ceramopora foliacea Hall. See Meekopora foliacea. 
Ceramopora imbricata Hall. 
Ceramopora incrustans Hall. See Fistulipora crustula. 
Ceramopora niagarensis n. sp. 
Ceramopora orbiculata Ringueberg. See Ceramoporella orbiculata. 
Ceramoporella irregularis n. sp. 
Ceramoporella orbiculata ( Ringueberg) . 
Chaetetes expansus Ringueberg. See Orbignyella expansa. 
Chilotrypa? coalescens Nickles and Bassler. See Chilotrypa ostiolata. 
Chilotrypa ostiolata (Hall). 
Clathropora alcicornis Hall. 
Clathropora frondosa Hall. 
Clathropora frondosa intermedia Nicholson and Hinde. 
Clathropora intermedia Nicholson and Hinde. See Clathropora frondosa intermedia. 
Cceloclema cavernosa n. sp. 
Diamesopora dichotoma Hall. 
Diastopora consimilis Vine. See Berenicea consimilis. 
Diastoporella consimilis Vine. See Berenicea consimilis. 
Diploclema sparsum (Hall). 
Diploclema sparsum argutum n. var. 
Diplotrypa milleri Ulrich. See Mesotrypa nummiformis. 
Diplotrypa walkeri n. sp. 
Drymotrypa diffusa Ulrich. See Pseudohornera diffusa. 
Drymotrypa niagarensis Ulrich. See Pseudohornera niagarensis. 
Eiidotrypa nodulosa n. sp. 
