284 



MEDUS.E OF THE WORLD. 



Eucheilota duodecimalis var. parvum. 



Diplfuron parvum, Brooks, 1882, Studies Johns Hopkins Univ. Biol. Lab., vol. 2, p. 130. 



This variety resembles E. duodecimalis in all respects excepting that the gonads are 

 developed upon only 2 of the radial-canals. The gonads are spherical in shape and found 

 upon 2 diametrically opposite radial-canals, near the circular vessel. 



This form was found by Brooks at Beaufort, North Carolina, from June until August, 

 and in 1904 I found it in a surface-tow taken early in December, off Cape Fear, North Caro- 

 lina. It appears to be a local race or variety of E. duodecimalis. 



Fir.. 151a— A, Eucheilota duodecimalis; B, c and D, Eucheilota duodecimalis var. parvum. Drawn by the late Prof. William K. 

 Brooks at Beaufort, North Carolina, and presented by the Department of Biology of Johns Hopkins University for pub- 

 lication in this work. 



