| a ing much the larger of the two. 
164 Recent Discoveries of Fossil Fishes, etc. [Fe 
. May eventually be found to be mere varietal forms of one. 
what variable species. So far all attempts at tracing out t 
sutures on the cranial shields of the Campbellton Coccoste us 
entirely failed, although one specimen has been ground doy 
e manner suggested by Professor Huxley. 
Cephalaspis campbelltonensis —Large head-shield of a Ce 
pis, probably belonging to the section Eucephalaspis of 
Lankester, with the orbits well defined and the prominen 
` depressions of the central region very clearly shown. 
specimens are very much crushed and distorted and nearly a 
exfoliated. Portions of the true outer layer of the test 
seen only on the central portion of the outer margin of 
hand side of one large fragment, and on the extremit 
cornua in two or three other specimens. The enamel j 
outer surface appears polished and nearly smooth to the 1 s 
eye, but under a lens it is seen to be minutely and densely | 
the pits being very irregular in their shape, size and. 
arrangement. Where the enamel is removed the surface 
into numerous well-marked polygonal areas. 
Including the C. dawsoni of Lankester, from Gaspé, all 
cies of Cephalaspis hitherto described are said to be che 
_by a surface ornamented by raised tubercles, usually of 
size, so that the C. campbelltonensis may be readily distin 
by its minutely pitted sculpture. ae 
_ Ctenacanthus latispinosus. —This species is represe 
-Foord’s collection by a few fin-spines about two inches 
in length, which are = even for the regularly 
structure of their radiating 
 Homacanthus, sp. undt AN single imperfect and ba 
served spine of a species of Homacanthus, which, as far 
ascertained at present, resembles the Æ. arcuatus of - 
- almost ev ery respect but that of size, the Canro sp 
-~ ~ The fossil plants as well as fishes found at Ca 
a to be entirely different to those of Scaumenac bay, ana i 
o lity entomostraca, Spirorbis erianus, fragments of al 
a. gotus, and two new species of Cyclora are asso 
