BAIN Canadian Record of Science. 
2. A second species shows numerous large and long root 
spicules similar to those included in the genus Hyalostelia 
of Hinde. Some of them shew crutch-shaped terminations 
at the distal ends. Such remains of the body of the sponge 
as have been found, appear to consist of small cruciform 
and simple spicules, not unlike the debris of a modern 
Hyalonema. This sponge was larger than the preceding. 
It may be provisionolly named H. Metissica. 
3. A third shews what seem to be remains of a thin-walled 
hollow sponge, with vertical and tranverse spicules arranged 
somewhat in the manner of those of the genus Cyathophy- 
cus of Walcott.' Like that genus, it contains also small 
loose cruciform spicules. It seems to have been conical 
and pointed below, and without long roots. It may be 
named OC. Quebecensis. 
4. Small ovoid masses of stout biacerate spicules, diverg- 
ing from the centre and sometimes in fan-shaped tufts, 
seem to indicate a species of the genus Lasiocladia of 
Hinde. The specimens shew indications of an external 
membrane, and they had somewhat strong root spicules, 
much larger than those of the body. 
5. Oval masses of small simple spicules, imbedded in 
patches of pyrite and without any definite arrangement of 
root spicules, may either indicate the presence of a hali- 
chondroid sponge, or of patches of spicules imbedded in 
coprolitic matter. The former is, perhaps. more likely to 
be the correct explanation. 
An interesting point in connection with these remains is 
the appea: ance of so many distinct types of silicious sponges 
in one locality and formation. This fact was not distinctly 
noticed till the specimens were carefully examined, and it 
invites to further search in the locality, in hope of discov- 
ering new forms or more perfect examples of those repre- 
sented in the present collection only by fragments. 
1See note appended. 
