PROUT—BRYOZOA, 3D SERIES. 449 
PoLYPORA TUBERCULATA, 0. sp. 
Bryozoum a fan-like expansion, probably one or two inch- 
es wide. 
Longitudinal rays moderately large, pretty uniform in size, 
saddenty enlarged before and after bifurcation; sagt he aren 
at one, one veal eh half, and near two lines 8 apart; ran 
ing oppositely on two branches from the main rkinels ms 
scarcely diminished oo by branching and rapidly. creo 
ing their original si 
Dissepiments anal, about i sates: as large as the 
about one-third the transverse diameter and one-fifth the lon- 
gitudinal diameter of the fenestrales slightly depressed, not 
“Fenris much at junction 1 with the rays. 
, ees | 
ulate o: rtivecutse near the bfureatons, twice as | ag brat 
slightly. broader than the rays generally opposite 
transversely five fenestrules; or, in ns ‘mais there are 
fete and six trans svers 
rmits, and sometimes shows a probe Pode to 
home aah Cell-p -pores five, tubercles three or four to 
each fenestrule. 
Reverse oe by a dense cortical substance, with afew 
granul 
Geol. Pos. & Loc.—Third or Uppe = Archimedes Lime- 
stone of the Carboniferous series, Chester cial 
collection. 
Comparisons.—This delicat 
ora general nce to "the P: hipaa 
des desert i ct. Mos.) as quoted eyser Ww was 
e latte eon wupecien eds upon the re- 
dtteadenty of the lines of tubercles upon the lon- 
ys, there are other minor differences, which will 
ey are not identical,—such as the slow ers 
ongitudinal ribs, the greater number ores 
sega the more oval form of t 
