682 PALAEONTOLOGY OF ILLINOIS. 



The ARTHROSTYLHLE and ASCODICTYONID.E also are constituted 

 as in our classification, but under the BATOSTOMELLIDJE we miss 

 Bythopora, Callotrypa and Stenopora, the last being placed 

 among the corals, and the second among the TREMATOPORHLE, 

 while a new family, the BYTHOPORID^E, is proposed for the firwt. 

 The family as given by him embraces besides Anisotrypa, Ba- 

 tostomella and Leioclema, also Batostoma (?) and Peronopora, 

 the latter probably through a clerical error, since on p. 199, he 

 places the genus as a synonym for Monticulipora* 



The BOTRYLLOPORHLE, including only Botryllopora, may be a 

 good family. We did not feel warranted in proposing a new 

 family and in our classification have doubtfully referred the 

 genus to the FISTULIPORHLE. 



The CERAMOPORID^, however, is a heterogeneous assemblage. 

 Thus, beside Ceramopora, Ceramoporella, Chiloporella, Crepipora 

 and Spatiopora, which are properly referred here, the family is 

 made to embrace Eridopora, Glossotrypa, Lichenalia, Licheno- 

 trypa, Odontotrypa, Pileotrypa and Selenopora, all genera 

 that, if not actual synonyms for Fistulipora, are at any rate 

 so closely related to that genus that they must belong to the 

 same family. None of them possess the structure characterizing 

 the Ceramoporoids, while all have the vesicular interstitial 

 tissue and zocecial wall structure marking the Fistuliporoids. 



Ceramella, an unquestionable synonym for Glyptopora and 

 therefore a genus related to Cystodictya, (referred by Mr. Miller 

 to the STICTOPORHLE) is also placed here, together with Peti- 

 gopora, a genus whose minute structure agrees intimately with 

 Dekayia, which, as we have seen, he puts with the ALCYONARIA. 

 Sagenella, founded upon a species, that if it is not strictly a 

 Berenicea, clearly belongs to the TUBULIPORID^E and Phracto- 

 pora, the relations of which are uncertain and which he also 

 refers to the STICTOPORID.E, complete the list of genera placed by 

 him as CERAMOPORID.E. 



* It is interesting to note how differently authors view the Monticuliporoid divisions 

 proposed by Nicholson. Contrast with the above Waagen and Wentzel's recent erection 

 of the subfamily Peronoporince (Pal. Indica, Ser. XIII, I, 6.) 



