68 Canadian Record of Science. 
surface and intermingled with detached cruciform spicules. 
These various forms may well have been the anchoring 
and body-spicules of examples of the same species, now 
disintegrated and compressed together. 
Hyalostelia Metissica, Dawson. (No. 2 of previous paper.) 
This species is based on detached cruciform and anchor- 
ing spicules, the latter somewhat more robust than those 
placed as C. Quebecensis. In the present fragmentary con- 
dition of these forms it is impossible to give a satisfactory 
description, and the species must be regarded as provisional 
until better specimens are discovered. 
Sponges of uncertain character. (Nos. 4 and 5 of pre- 
vious paper. 
On some of the slabs from Métis are small oval com- 
pressed patches, apparently consisting of small fusiform 
acerate spicules, sometimes parallel, at other times cross- 
ing each other irregularly. They do not stand out definite- 
ly as in the case of the hexactinellid sponge spicules, but 
appear to be embedded in some membrane. In two in- 
stances, anchoring spicules, like those of Protospongia, pro- 
ject from the base of the mass. Ido not know of any mon- 
actinellid sponge furnished, as these appear to have been, 
with long anchoring spicules. Sir J. W. Dawson has 
suggested a resemblance to Lasiocladia, but they do not 
belong to this genus. 
In another specimen an elongated space about 50 mm. in 
length by 16 in width, with well-defined margins, is covered 
with a thin film of pyrites, which may have resulted from 
the replacement of a mass of minute spicules, of which 
traces remain in some places, but no structure whatever 
can be recognized in it now. Sir J. W. Dawson has pro- 
visionally named the fossil Halichondrites. 
Science, Aug., 1881, and Bulletin Am. Num. Nat. Hist., Dec., 1881), 
the spicules are apparently filiform and arranged in broad longi- 
tudinal and tranverse bund?es crossing each other, and with small, 
loose flesh-spicules in the meshes. They are therefore different . 
from those of Cyathophyens, or, as it should now be called, Cyatho- 
spongia. Hydnoceras is liable to the objection that it was intended 
to indicate affinity to cephalopod shells. J. W. D.] 
