130. Mr. F. Moy on some new genera and species of 
moved by Ehrenberg (Ueber Corallenthiere des rothen Meeres, 
&c.) and Lonsdale (Silurian System) to the recent genus Porites, 
in which they were followed—probably without examination—by 
many writers; Profs. Bronn (Lethza, &c.), Phillips (Paleozoic 
Fossils) and others have however much more happily pointed out 
their resemblance to Heliopora. The distinct walled tubular cells 
visible in both sections, connected by cellular tissue, with their 
twelve rudimentary lamelle, distinguish the present ancient corals 
from the modern genera just named, for Porites has a minutely 
reticulated corallum impressed by shallow polygonal undefined 
cells on the upper surface, and presenting in the horizontal and 
vertical sections an uninterrupted uniformly vesicular structure. 
Heliopora agrees. perfectly m external appearance, and in the 
two sections exhibits the same characters of vesicular structure 
connecting tubular cells with transverse diaphragms, but in it 
the tubes have eighteen or more rudimentary lamelle, while 
they are constantly twelve in the present genus, which I only 
know as yet in the older and middle paleozoic roeks. 
Fistulipora (M‘Coy), n. g. Pete 
Gen. Char. Corallum incrusting, composed of long, simple, cylin- 
drical, thick-walled tubes, the i 
mouths of which open as simple 
_ equal circular cells on the sur- 
face, and having transverse 
funnel-shaped diaphragms at 
variable distances ; interval be- Fo tse 
tween the tubes occupied by 4 Fistulipora: a. mode of growth, nat. 
cellular network of small vesi- size, enveloping a crinoid stem. - 
cular plates. 6. magnified surface and section. - 
This genus is proposed to inelude the Manon cribrosum (Gold.) 
of the Eifel, &c., and the two following species from the moun- 
tain limestone. They have no affinity with the fossil sponges of 
the genus Manon, with which the only previously known species 
was classed by Goldfuss and others, but are more allied to the 
so-called Porites of the palozoic rocks (Paleopora, M‘Coy), 
from which they differ in the absence of the rudimentary radia- 
ting or vertical lamellz to the cell-tubes. The sides of the tubes 
do not seem to be ever perforated by connecting pores. . 
Fistulipora minor (M‘Coy). 
Sp. Char. Cell-tubes with slightly prominent margins at the 
surface, about four in the space of one line, rather less than 
their own diameter apart, the intervening space composed of 
from one to three rows of the minute vesicular cells. 
The tubes of this species are of so small a diameter that I have 
