82 
VINE: NOTES ON YOREDALE POLYZOA. 
slight undulations which appear to be faintly indicative of a primtave 
keel, and the only indication of lateral branching appears at the base 
of the right hand row of cells. Here one cell is stunted, and the 
one below it is large, having the appearance of an ovicell, but it 
appears to be rather the originating cell of a branch. I have only 
met with it in one locality in England, but I believe the same form 
is present in some of the Scotch shales, and examples are in Mr. J. 
Young's cabinet. 
Locality : Yoredale, Holker Park. 
In my British Association Beport (1883), on Fossil Polj^zoa, I 
founded the Family Diploporidge for the reception of all the 
Carboniferous Species having secondary pores. In the group I 
placed tlie so-called Carboniferous Sijnncladi<e ? as well as other 
forms. On more mature consideration I lind that the association is 
open to misconception, and in all probability the functions of the 
" secondary pores" in species of Septopora and Diplopora. &c.. may 
be different. Under these circumstances it will be far wiser to 
either found a new family for the reception of the Septopora group 
and allow DiploporidaB to stand, or to place lliem in a subsectional 
division of the Family FeneMellidce, thus: — 
Group B. 
Genus Synocladia, King (restricted), Permian Fossils. 
Genus Septopora, Prout (Redefine from Front's species). 
The latter genus though abundant in American, and in some of 
the Scotch Carboniferous rocks, has no representative species in the 
North Lancashire shales, or even, so far as I am acquainted, in any 
other English locality. 
Family Diploporidae, Vine (restricted). 
1883. Fourth Brit. Association Report, Fossil Polj^zoa. 
1884-5. " Naturalist," Vine, p. 315 
Zoarium fenestrated, or partly free and fenestrated. Zoacia 
arranged biserially in the branch, opening on one side only. 
Supplementary pores in all the species, placed immediately below 
the orifice of the cell and separated from it by a thin septum. 
