Surface Fauna of the Bay of Fundy. 605 
should carry our comparisons of the surface life of the two locali- 
ties among other groups, we should find as marked a similarity 
there as among jelly fishes. One or two examples may suffice for 
illustration, 
There is no pelagic mollusc which is more truly boreal than 
the well-known Clione borealis This pteropod rarely ventures 
into Narragansett Bay, is more common as we go north, and 
was at one time observed in great abundance in the Bay of 
Fundy. In the North Atlantic and on the shores of Greenland it 
is found at times in countless hosts. 
Among the pelagic annelides, one of the most common at Grand 
Menan is a species of Sagitta, which bears a strong resemblance to 
a Sagitta found in Lady Franklin Bay by Lieutenant Greely. 
This Arctic Sagitta is markedly different from the Sagitta of 
Narragansett Bay. 
The species of Appendicularia found in the Bay of Fundy is 
different from that of Newport, and appears to be the same as that 
recorded by Murdoch from Point Barrow. This pelagic ascidian, 
as is well known, is found in some places enclosed in a gelat- 
inous envelop called the “ haus,” which serves ‘as its protection, or 
for other purposes. Although I have repeatedly taken Appendicu- 
laria in Narragansett Bay, I have never found the “haus” in those 
waters. From Murdoch’s description of the Arctic Appendicularia 
and from its size, I am inclined to think that the Bay of Fundy 
Appendicularia? will also be found with houses. The mere fact 
alone that the Arctic Appendicularia has the house, so-called, is not 
characteristic, for animals of this or allied genera in warmer waters 
have the same structures, 
The resemblances between these two marine faunæ suggest inter- - 
esting general questions of distribution. Students of the geograph- 
teal distribution of terrestrial animals easily recognize the facies of 
organic life from different continents. A collection of the land 
animals of Australia has an altogether different appearance from 
ene from Europe, while those from South America are different 
ftom those of North America. While the characters which impart 
| I have taken many specimens of the larva at Newport. 
* It is undoubtedly true that the Bay of Fundy Appendicularia is a 
different species or even genus from that of Narragansett Bay. It 
Closely resembles the genus Oikopleura. 
