CTENOPHORES OF THE ATLANTIC COAST OF NORTH AMERICA 53 
A. Agassiz, from the Pacific coast of North America. Moser, 1908, 1909, 
records it from the eastern coast of Japan and also from the Antarctic, 
Pacific, and Indian oceans. 
In September, 1910, I visited Newfoundland in order to examine a 
-sufficiently large number of B. cucumis to be assured that it is actually 
specifically distinct from B. ovata. No differences can be detected in the 
immature individuals of both species. When mature, however, some of 
the side branches from the meridional vessels join with the paragastric 
Fic. 12.—Young Beroé cucumis 19 mm. long. From life by the author. Hali- 
fax, Nova Scotia, September 27, 1910. Peripheral canal-systems of two broad 
sides are separated one from the other, and there is noring-canal around mouth. 
The canal-system is in a stage characteristic of the adult Cestide. 
canalsin B. ovata, but this does not occur in B. cucumis. Moreover the 
side-branches anastomose in B. ovata, but in B. cucumis they remain 
separate one from another (see fig. 76, plate 17.) In B. forskali of the 
Mediterranean, Pacific, and Antarctic oceans, the fusions between the side 
branches and the paragastric canals are more frequent than in B. ovata, 
but I am not sure that the difference is actually a specific one, for it 
may be of an intergrading character. 
