140 Cincmnati Society of Natural History. 



JDiscotrypa, Ul., 1882. 



Batostoma, Ul., 1882. 



Batostomclla, Ul., 1882. * 



Feiigopora, UL, 1882. 



Leptotrypa, UL, 1883. 



Monotrypclla, UL, 1882. 



CeramoporcUa, UL, 1882. 

 a. Sub-genus. Dekayia, Ed. and H.. 1851. 



Bekayella, UL, 1883. 

 /'. Sub-genus. Constellaria, Dana, 1846. 



Stellipora, Hall, 1847. 

 c. Sub-genus. Fistulipora, McCoy, 1849. 



Homotrypella, UL, 1885. 



Didxtnopora, UL, 1882. 



Eridflpora , U 1 . , 1882. 

 . Callopora, Hall, 1852. 



Callopflrella, UL, 1882. 



Leiodema, UL, 1882. 

 2 —Genus. Ceramopora, Hall, 1852. 



Crepipora, UL, 1882. 



A formidable list of synonyms surely ; and such is the confus- 

 ion caused by their coinage, and such are the changes of opinion 

 in respect to their position, that it becomes almost an impossibility 

 to say to which one of the sub-genera some of them belong. The 

 foregoing must, therefore, be regarded as merely tentative. As il- 

 lustrating this fact, and to show the radical changes proposed, we 

 quote from Mr. Ulrich's remarks on Hctej'otrypa, Nich. "Of the 

 seventeen species placed under Bctcrotrypa by Nicholson, (Genus 

 Mont. 1881) but two are, according to my opinion, congeneric, 

 [naming them]. Of the remaining fifteen, five must be referred to 

 Callopora, Hall; two to Ampkxopora, UL, one to Homotrxpa, UL, 

 three to Batostoina, UL, two to Batosfomella, UL, and one to Mo- 

 notrypella, Ul."* In another place, in speaking of the sub-genus 

 Monotrypa, Nicholson, Mr. Ulrich says that of twelve species re- 

 ferred here, four are congeneric. Two are doubtful, three belong 

 to Mfljtotrypella, UL, one is a Ftilodictya, one belongs to Aviplexo- 

 pora, UL, and the remaining one should be placed in Spaiio- 

 pora, Ul.f 



*J. C. S. N. H., vi.Sj. 

 tibid V. 256. 



