472 Messrs. R. Etheridge, Jun., and A. H. Foord on 
LV.— Descriptions of Paleozoic Corals in the Collections of 
the British Museum (Nat. Hist.).—No. I. By Rosert 
ETHERIDGE, Jun., and ArTHuR H. Foorp, F.G.S. 
[Plate XVII. 
FAVOSITELLA, gen. nov. 
Gen. char. Corallum of irregular form, concavo-convex, 
thin ; attached to some foreign body ; composed of minute 
rounded or subpolygonal contiguous corallites, which are of 
two kinds, large and small; the latter distributed over the 
surface in clusters, raised slightly above the general level. 
Walls lamellar, distinct. Tabulee in the larger cells some- 
what remote, horizontal, slightly curved, with the convexity 
downwards ; more numerous in the smaller ones. Mural 
pores few in number, large, irregularly distributed. Base 
covered with a concentrically striated epitheca. 
Obs. In all its external characters this form bears a marked 
resemblance to some of the genera of the Monticuliporide, 
and until microscopical sections of it had been examined it 
was unhesitatingly referred to that group. The presence of 
mural pores, however, points clearly to its I’avositoid affinities, 
while from all the known genera of the Favositide it is dis- 
tinguished by the monticulose character of its surface and the 
dimorphic structure of its tubes. As regards the perforation 
of the walls in Favosztella, a character which excludes it from 
the Monticuliporide, it is true that Mr. EK. O. Ulrich * (who 
has given much attention to that group) states that he has 
detected mural pores in a ‘ single specimen of an undoubted 
Monticuliporoid species,” viz. Homotrypa curvata, Ulrich; but, 
granting that they do occur in this one species, it may be 
confidently affirmed that out of hundreds of sections of Mon- 
ticuliporoid species which have been examined by Dr. 
Nicholson, Mr. Ulrich, and one of the writers of this paper, 
no such structures have been seen in any other form, If 
Homotrypa curvata does possess mural pores, then the proper 
course is to remove it from the Monticuliporide and place it 
in the Favositide, where also Stenopora finds its appropriate 
position, and not in the Monticuliporide, according to Mr. 
Ulrich’s amended classification of that group}. In_ brief, 
Favositella differs from all other genera of the Favositide in 
* Journ. Cincinnati Soc. Nat. Hist., “ American Paleeozoic Bryozoa,” 
vol. v. p. 124 (1882). 
+ Loe, cit. p. 158. 
