HYDROMEDUSAE, SIPHONOPHORES, AND CTENOPHORES. 341 

 Diphyopsis dispar — material examined — Continued. 



I have given elsewhere (1911&) my reasons for uniting the Indo- 

 Pacific dispar with the Atlantic campanulifera. 



The general form of the superior nectophore is so characteristic 

 that it is not likely to be confused with any other diphyid. 



The proportions between length and breadth in 25 specimens, 

 ranging from 9 to 22 mm. in length, are given in the following 

 i able: 



This table shows that proportional length decreases very slightly 

 on the average with growth. The ratio is approximately slightly 

 more than 2 to 1 in small specimens, 10 mm. high or less, about 2 to 3 

 in moderate sized, and slightly less than 2 to 1 in the largest. 



