﻿American Palaeozoic Fossils. 



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tinctly bidenticulate zooecial apertures. Thus restricted Lichenaliais 

 a useful and natural division of the Fis tulip oridce. 



FlSTULlPORA CARBONARIA, D. Sp. (PI. III., figS. 1, la.) 



Zoarium irregularly lamellate or sub-massive, several inches in 

 diameter; thickness variable, not known to exceed 0.6 inch. Zooecia 

 with oval or circular apertures, about l-50th of an inch in their long 

 diameter, surrounded by a thin inconspicuous peristome; separated 

 more or less completely by a single row of very unequal, angular, ves- 

 icular cells, which, at rather irregular intervals, are aggregated into 

 substellate clusters or maculae. In the spaces between these clusters, 

 nine or ten cells occur in the space of 0.2 inch. 



Tangential sections (PL III., fig. 1) show that the zooecia are sub- 

 ovate, very thinwalled, and often contiguous at limited points. The 

 interstitial vesicles are very irregular, are unequal in size, and never, 

 excepting in the maculae, occur in more than a single series, between 

 the zooecia. 



In longitudinal - sections (PI. III., fig. la) the anterior wall of the 

 zooecia is generail} 7 flexuous or corrugated, the other side being 

 straight; between the walls the space is traversed by straight dia- 

 phragms, recurring at intervals of a half tube diameter or slightly 

 more. Vesicular tissue not closely woven, composed of comparatively 

 large but unequal lenticular vesicles. 



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This species probably finds its nearest ally in F. minor, McCoy, 

 from which it differs in having the zooecia separated b}^ much nar- 

 rower interspaces, and in having these occupied by only a single 

 instead of a double series of vesicles. That species also is not known 

 to have maculae. 



Formation and localit}^: Not uncommon in the Upper Coal Measure 

 deposits at Kansas City, Mo. 



Fistulipora prolifica, n. sp. (PI. III., figs. 2, 2a.) 



Zoarium large, irregularly laminar or sub -massive, as much as four 

 or five inches in diameter, and one to two inches in thickness; upper 

 surface celluliferous, irregularly undulating or lobate; under surface 

 attached at one point to some foreign body, the rest free and 

 covered by a. strongly wrinkled, thin epithecal membrane. Zooecia 

 with a faint peristome, sub-circular apertures, about l-75th of an inch 

 in diameter, and separated from each other about the same distance; 



