HYDROMEDUSAE, SIPHONOPHORES, AND CTENOPHORES. 301 



Gonads continuous from bell margin to extremity of peduncle 

 have not been described for levuka, though one of the Philippine 

 examples approaches this condition. There is such an example, it 

 is true, in the present collection, but cirri being absent, I hesitate to 

 credit it to that species. 



? EUTIMA LEVUKA. 



? Eutima levuka — material examined. 



There are 23 large tentacles, 5, 5, 5, and 4 interradials, respectively, 

 to each quadrant. In the one well-preserved quadrant, with 4 inter- 

 radials, there are 26 knobs, 5, 4, 6, 6, and 5, between successive pairs of 

 tentacles. If we assume that this number is continued all around 

 the margin we would have a total of 104 knobs. There are no cirri 

 flanking either tentacles or knobs, nor is there any pigment in the 

 knobs. 



The peduncle is narrow and hangs well below the bell opening. 

 The gonads are stout and extend in unbroken ridges over the entire 

 length of the peduncle, and extend over the subumbrella almost 

 to the circular canal. 



The only characters separating this specimen from levuka are the 

 large number of tentacles, absence of cirri and of pigment, and the 

 length of gonads. The first and last of these might naturally be 

 expected to be the end condition of the Philippine specimens described 

 above did development along these lines progress far enough. And 

 we must remember that Brooks (1886) long ago described examples 

 of E. mira with the subumbrellar and peduncular gonads practically 

 continuous. As pointed out above (page 300), pigment is sometimes 

 absent even in young specimens of levuka; and there is some evi- 

 dence that the cirri flanking the tentacles are progresswely lost with 

 growth. All this points to a probable identity with levuka. But to 

 prove it will require the discovery of stages connecting the two. 



Genus PHORTIS McCrady, 1857. Sensu Mayer 1910. 



The genus Eirene, as recognized by Haeckel (1879), has been 

 divided by Mayer (1910) into Eirene and Phortis, the former with, 

 the latter without, cirri on the bell margin. And his diagnosis is 

 accepted by Vanhoffen (1912). 



