384 Canadian Record of Science. 
In the lower part of the Basal or Georgian series have 
been found worm tracks, casts'and burrows, referred to in a 
communication to this journal. Of lower organisms, sponges 
are well represented. Remains of basket sponges (Ku- 
plectellide) are quite common in the finer beds. Of these, 
beside the sponges with regular transverse bars, there are 
others which possess an irregular mesh with diagonal and 
forked spicules. Another family of sponges is represented 
by forms with a thick parenchyma and numerous irregular 
loculi; the oscules in these sponges are sometimes arranged 
with an approach to a regular order, but more frequently 
they are irregular. A third family (probably) of sponges 
has left skeletons of small rods in which no spicules have 
been found, these are studded with minute elevations 
marking the place of denser globular masses in the body. 
Certain minute bodies with the sponges appear to be 
Radiolarians, some are club-shaped, others globular, and 
one is Oval with a raised hexagonal ornamentation. 
The flora of this series consists of sea-weeds. One of the 
oldest of these, a Paleeochorda, is found in the lowest sand- 
stone beds, where it is associated with the remains of 
sponges; although a plant of such great antiquity, it is 
comparatively highly organized in the structure of the 
stem, to which large jointed setz were attached. 
In the arrangement of its barren fronds, another interest- 
ing species recalls the Fucoides circinnatus of Brongniart, 
but in the Acadian species, the branches are fiat, and not 
round, as those of that species are said to be. The 
Acadian species had narrow, fertile fronds, bearing spikelets 
(stichidia) after the manner of some of the red sea-weeds. 
Brachiopods so far, appear to be rare in this series of 
beds; there is however, near the middle of the series, a 
large one having the appearance of an Obolus, and re-. 
sembling the Mickwitzia monilifera, Schmidt, (Lingula? or 
Obolus? monilifera Linrs.), but apparently distinct. 
Undoubted examples of Platysolenites of Pander, a 
crinoidal genus of the Blue Clay of Russia, have been found 
with this brachiopod. 
