502 PROCEEDINGS OF SCIENTIFIC SOCIETIES. 
Professor Hall and Sir W. E. Logan, so remarkably distinguished by 
the predominance of mechanical sediments, and by a development of 
the lower rather than the upper members of tho Lower Silurian. 
To ascend from these rocks to the Carboniferous, — recent pio 
of Mr. Davidson, Mr. Hartt, and the author, had led to the division of 
the Lower Carbo seta into successive subordinate —_— and to 
the determination of m f the marine fossils, and also to the expla- 
nation of the curious wis cs ently anomalous fact shat some forms 
allied to Permian species ue exist in the Lower Carboniferous, 
proper, can fairly be made in Nova Scotia, ine the gran 
development of the er dene in thicknes 
After noticing the large advances made in a fossil botany of Nova 
Scotia and New Brunswick, the paper referred to the discovery by 
Mr. Barnes of two new species of insects, and to the discovery by the 
writer of a new pulmonate mollusk, described by Dr. P. P. Carpen- 
ter, as Conulus priscus. There are thus in the coal formation of Nova 
Scotia a Pupa and a Conulus or Zonites, generically allied to living 
pulmonates, and representing Babies in that early period two of the 
eee types of these creatu 
S mens of these ean were aes and also specimens and a 
= seen of the Laurentian fossil Zozojn Canadense sent by Sir 
W. E. Logan. Special attention was drawn to the specimen recently 
found by the Canadian Survey at Tudor, which shows oie organism in 
a state of preservation comparable with that of ordinary Silurian fos- 
sils. 
‘On the Distribution of Radiata on the West Coast of America.” By 
Professor A. E. Verrill. In this paper the author has endeavored to 
present all the facts hitherto published in regard to the geographienl 
distribution of the Radiates along the entire Pacific coast o 
as well as many new observations upon those found in the orad re 
on. 
The present state of our knowledge indicates that the entire Ome 
may be divided into at least eleven regions, or zodlogical provinces, 
the bounds eN adjacent provinces, on one or both ends, in dimin- 
ished ı Temperature was shown to be the principal physi- 
cal agency ii Halting the distribution of species, but the nature 
of the bottom and the character of the shores have their influ- 
ence. "oe depth of water gerend bas a e mmaala 
