102 
Colborne ; also in the Hamilton group at Bartlett's Mills, near Arkona, Township of Bosan- 
quet. 
125. ReTEporRA PHILLIPsI (Nicholson). 
Retepora Phillipsi (Nicholson), Geological Magazine, April, 1874. 
Polyzoary infundibuliform, or forming a flattened expansion. Branches slender, fifteen 
to eighteen in a quarter of an inch measured transversely, parallel, flexuous, not united by 
dissepiments, but coalescing at intervals of about a third of a line, and over spaces of the same 
length. Fenestrules oval, six or seven in the space of a quarter of an inch measured vertically, 
seven or eight in the same space measured diagonally (five in two lines on an average), regu- 
larly alternate in contiguous rows. ells in two alternating rows upon each branch, the rows 
separated in decorticated specimens by a distinct impressed line. Three cells to the length 
of a fenestrule, sometimes only two, and one or two opposite the points where the branches 
coalesce. Reverse unknown. 
This is a genuine etepora, and is closely allied to the pre- 
ceding in its general form and its biserial cells, It is, however, 
readily distinguished by the more slender, crowded, and apparently 
nop-carinate branches, the much smaller size of the fenestrules, 
and the greater number of these openings in agiven space. I have 
named the species in honour of Professor Phillips, to whom we 
Fig. 39. owe so many descriptions of Devonian and Carboniferous fossils. 
aca Bear merece Locality and Formation.—Corniferous Limestone of Port 
the same in which the outer non-cel- Colborne. 
luliferous layer has been removed, 
showing the beaks of the cells, en- : 
larged. From the Corniferous Lime- Ger Us CRYPTOPORA (N icholson). 
stone, 
(Canadian Journal, Vol. XIV., No. 2, and Annals of Nat. History, Feb. 1874.) 
Polyzoary forming a rigid infundibuliform calcareous expansion, springing trom a strong, 
solid, branching foot-stalk or rhizome. Hxterior.of the ccoencecium, forming a continuous, 
non-perforated, thin, caleareous membrane, internal to which is a second or intermediate 
layer, the two being composed of the amalgamated or coalescent branches (‘ interstices ’’). 
This intermediate layer is marked by shallow longitudinal and bifurcating sulci corresponding 
with the lines between the branches, and its surface exhibits reticulating lines which corres- 
pond with the bases or proximal ends of the cells. The internal surface of the intermediate 
layer carries the cells, which are flask-shaped, and are arranged in double rows, forming 
regularly flexuous lines, enclosing oval interspaces, exactly as in Retepora. The oval interspaces, 
however, instead of constituting so many ‘‘ fenestrules,” are the bases of so many pillars, which 
proceed perpendicularly inwards, across a central space, to join with an internal caleareous 
membrane which forms the innermost lining of the funnel-shaped frond, 
It follows from the above description that the mouths of the cells in Cryptopora, neither 
open on the exterior of the frond, as is commonly the case in Fenestella, nor open on the 
interior of the polyzea- 
ry, as is the case in the 
infundibuliform species 
of Retepora. On the 
contrary, we have in 
this extraordinary gen- 
us ‘the entirely unique 
arrangement that both 
the internal and ex- 
ternal aspects of the 
funnel-shaped frond are 
Fig. 40. to all appearance closed 
Cryptopora mirabilis (Nicholson). A. A partially decorticated specimen, natural size ; by a continuous -ealea 
B. A small portion of the same, showing the inner ends of the perpendicular columns en- Th 
larged ; C. Another partially decorticated specimen, springing from a strong foot-stalk, TCOUS membrane. € 
natural size; D. Part of the interior surface of the intermediate layer, showing the mouths 
of the cellules and the broken perpendicular columns, enlarged ; H. A small portion of the cells are not placed upon 
frond greatly enlarged, and somewhat diagrammatically represented ; #. Transverse section either of the free sur- 
of part of the frond enlarged, and also represented in a slightly diagrammatic manner ; a. The 
external membrane ; b. The intermediate sulcated layer ; c. The central space containing the faces of the polozoary 2 
cells and traversed by the perpendicular columns; d. The interna] membrane. but occupy a central 
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