VINE: CARBONIFEROUS POLTZOA. 
167 
that I have any record of in West Yorkshire or Derbyshire. 
With regard to Fenestella Jtustriformis as described by Martin, 
I have thought that the following quotation from the Petrefacta 
DerUensca^ Vol. L, PI. 43-45, Figs. 1 and 2, and Fig. 3, may be 
valuable. It is the only Polyzoa figured or described in the work. 
" Erismatholithus milleporites ? (flustriformis). 
Plano-foliaceous, reticulatis, poris minutis, sub-obsolelis sparsis. 
Fossil coral, originally a Millepora? Plano-foliaceous or flat, 
and thinly expanded like a leaf ; its form or outline is uncertain. 
(Note. — All the specimens I have yet collected appear to be only 
fragments or portions of the original). Its fabric open and reticu- 
lated, somewhat resembling the coralline distinguished by the title 
of flustrce. The surface of the fibres forming the reticulation, rough- 
ened with minute, indistinct scattered pores ; not, however, visible 
without the assistance of a magnifier. Common in Limestone, 
Middleton." 
I am unable to identify Martin's species in the Limestone of 
Middleton from either the description or figures. Fragments of F. 
jjlebia. and F. nodulosa are common, and I see no reason to prevent 
me referring Martin's type to F. plebia McCoy. 
Genus Ptylopora, McCoy. 
Zoarium, a feather-like arrangement, having a central stem, 
which gives off lateral branches, which are connected by dissepi- 
ments ; the branches very rarely bifurcate. 
5. Ptylopora Phillipsia. sp. nov. 
Zoarium multiform. — Central stem bearing two rows of 
cells like the Glauconome species. Lateral branches striking off at 
acute angles from the main stem, are united by dissepiments, 
ultimately forming a cone-like zoarium. Zoaecia on the central 
stem, one between each of the branches, on the branches from two 
to three on each side of the fenestrule. Dissepiments strong, slightly 
dilated at the points of junction with the branches. 
Locality : Castleton, Derbyshire. Rather abundant. 
The peculiar habit of this species is so unique that I feel cei'tain 
that it is not the Ptylopora j^luma of McCoy. I have some doubts 
as to whether fragments of the cone-like zoarium have not been 
