﻿ULRICH BASSLER] REVISION OF PALEOZOIC BRYOZOA 49 



Calloporas. To what extent, if any, this new genus will affect the 

 relations of the two families we arc not prepared to say. 



The following new genus necessitates a modification of our pre- 

 vious conception of the family to the extent of admitting untabulated 

 zooecia. Aside from the absence of diaphragms, the new type agi 

 very well with unquestionable species of Batostoma. 



Genus Anaphragma new genus 



Generic diagnosis. — Ramose Trematoporidce agreeing in all essen- 

 tial respects with Batostoma Ulrich, except thai both the zocecial 

 tubes and mesopores are entirely devoid of diaphragms. 



Genotype. — Anaphragma mirabile new species, Richmond forma- 

 tion, Illinois and Wisconsin. 



The specimens upon which this genus and species are founded were 

 collected some years ago and laid aside under the belief that they 

 belonged to a species of Batostoma. Though recognized as new, 

 it appeared too near in its specific characters to certain already 

 known species to make it worth while to work out its probably slight 

 internal peculiarities. Subsequently, it became desirable to deter- 

 mine all our material from the Richmond at Wilmington, [llinois, so 

 that this species came up for investigation with many others that had 

 been laid aside for similar reasons. The total absence of diaphragms 

 in the first set of thin sections was so unexpected that we were in- 

 clined to reject its evidence. When the same peculiarity was re- 

 peated in half a dozen other sets of sections, the features had to be 

 accepted as an established fact. 



We do not doubt that all will concede the generic value of this 

 structural difference between Batostoma and Anaphragma, but some, 

 possibly, may question the propriety of erecting the last-named genus 

 and Calloporina upon practically the same peculiarity. The genus 

 Calloporina is described on page 47. Critically examined, the latter 

 group of species proves to be as intimately related to Callopora, and 

 essentially in the same manner, as Anaphragma is to Batostoma ; 

 hence, if for any reason either of the new genera is united with the 

 other, the same reason would apply with equal force in merging, not 

 merely Bastostoma and Callopora, but their respective families as 

 well. ' 



ANAPHRAGMA MIRABILE new species 



(Plate XIII, 9-1 1 ) 



Zoarium of smooth, strong, subcylindrical branches. 8 to to or 

 more mm. in diameter, dividing rather frequently. Maculae not a 



