CARBONIFEROUS SPECIES. 61 



Septa from about fifty-six to seventy, all very tliin in the outer vesicular 

 zone, but (as seen in transverse sections) with the principal series thicker 

 within, and continued nearly (or apparently in part) quite to the middle, 

 while those of the intermediate shorter ones do not extend inward beyond 

 the narrow vesicular zone ; vertical sections showing the vesicular zone to 

 extend only from one-fourth to one-third of the way to the middle, and to 

 be occupied by a few rows of unequal vesicles, ranging outward and upward. 

 Tabulae, as seen in the section last above mentioned, numerous, occupying 

 a very wide space, equaling more than two-thirds of the entire breadth of 

 the corallum, passing nearly straight across, or merely curving downward 

 a little at their lateral margins, somewhat irregularly arranged, and, in part, 

 more or less divided. 



Entire length of corallites unknown; diameter of largest seen, 0.62 

 inch. 



One of the most marked features of this coral is the great breadth 

 of the tabulse compared with the narrow, outer, vesicular zone. This 

 character, and the fact that in some transversely-broken sections the septa 

 do not reach the naiddle, at first caused me to suspect that it might be a 

 branching Campophyllum. It is true, the species of that genus hitherto 

 known are simple ; but, as suggested by Edwards and Haime, there may be 

 branching species yet unknown. On grinding a transverse section, how- 

 ever, I find that the larger septa all extend farther inward than is usual in 

 Campophyllum, while some of them seem to extend quite inward to the 

 center (see fig. 4 a). I am therefore led to refer it to the genus Cyatlio- 

 pJiyllum. 



Specifically, it does not appear, when all its characters are taken into 

 consideration, to be nearly allied to any of the described species with which 

 I am acquainted. In the size of its corallites, and apparently in their mode 

 of growth, as Avell as in the great breadth of its tabulae, it is very similar 

 to C. pseudo-vermiculare of McCoy (Brit. Pal. Foss., pi. 3 c, fig. 8) ; but it 

 has a much larger number of septa, which pass farther inward, while its 

 outer vesicular zone is decidedly more complex. 



Locality and position. — Near Swansea, White Pine District ; Carbon- 

 iferous. 



