No. 2. — Studies from the Newport Marine Laboratory. 
Communicated by ALEXANDER AGASSIZ. 
XL. 
Some Variations in the Genus Hucope. By ALEXANDER AGASSIZ AND 
W. MoM. WoopwonrH. 
We examined for various points nearly four thousand specimens of 
Eucope (3,917). 
Among these we found nine specimens with only three radial canals, 
twenty with five, and three with six radial canals. 
There were fourteen specimens in which one of the radiating canals 
forked, the forking distal or proximal to the genitals being nearly equally 
divided. 
No less than thirty-nine specimens showed distinct traces of serrations 
or spurs from one or more of the radial canals. 
In eight specimens the radial serrations or spurs were not well defined, 
and the position and number of the radial canals were indistinct. 
In eight specimens marginal tentacles were observed, which had be- 
come united at the circular canal, sometimes with the tentacle next to 
the tentacle with the otolith. 
In six specimens there were marked spurs projecting from the base 
of some of the marginal tentacles. 
In eight specimens there were two otoliths in each sense capsule. In 
four there were three. 
In the othor specimens the principal variations extended only to the 
degree of development of the cycles of the marginal tentacles and of 
the genital organs. The latter showed in some cases peculiar leaf-like 
expansions extending laterally from the radial canals. 
The radial canals were four in number in an overwhelming majority 
of the specimens examined. 
The study of some of the variations in the genus Eucope was under- 
taken with a view of calling attention to the changes undergone in a 
species of jellyfish, of which great numbers are always easily obtained 
VOL, XXX, — NO, 2. 1 
