Al ive NOVA SCOTIAN GEOLOGY.—HONEYMAS. 
Crustacea. 
Calymene blumenbachii. 
Homalonotus dawsoni. 
Dalmania logani. 
Phacops stokesii ? 
Proetus stokesii ? 
Lntomostraca. 
Beyrichia. 
Crinoidea. 
Cornulites flexuous. 
Tentaculites. 
The greater part of the organisms of D Springville are iden- 
tical with those of D Arisaig. Still only a very small proportion of 
the species in the type have yet been found here. The same may 
be said of C, the other Upper Silurian member of the “ Upper 
Arisaig series.” When I make notes on my new map of Antigo- 
nish County this will be made manifest. It is evident however, 
even from the Springville series, that the fauna of Nova Scotia 
silurian had in C and D attained thei maximum development 
especially in cephalopoda, pteropoda, heteropoda, gasteropoda, 
lamellibranchiata, brachiopoda of certain genera trilobites and 
crinoids, The exceptions are as follows, viz: Brachiopoda, orthis, 
athyris,spirifer,these have their beginning and climax in A, lingulee 
in A and B, are rare in B’ and very rare in C and D. The 
trilobite, dalmanites, is characteristic of B’, Calymene is in A, C 
and D. The graptolithus expires in B’. The pteropod conularia 
is peculiar to B’, Petraia have their beginning, climax and end 
An) A. 
Marine vertebrates do not appear; all are invertebrates. The 
cephalopoda are of the highest order, and at the same time car- 
nivora of the period. 
CARBONIFEROUS (Ef f.) 
The fauna of the Lower carboniferous limestones succeed the 
Upper Silurian, in the County of Pictou and elsewhere in Nova 
Scotia as far as is known. This makes a large break in the suc- 
cession of life. To fill up the gap the Devonian or Old Red Sand- 
stone is required, with its fishes, crustacea, mollusca, &c. 
