Mr. E. Forbes on two Species o/* Cydippe. 149 



of the two animals I have described probably belongs : the 

 second, as far as I know, is undescribed, and new to the British 

 Fauna. 



Yet if the first be the Beroe pileus, Professor Grant's ani- 

 mal, judging from his elaborate figure and the appended de- 

 scription, must either be distinct, or has been incorrectly ob- 

 served. I am inclined (with all due deference to that distin- 

 guished naturalist) to the latter opinion, for the following 

 reasons : 



1st. In Professor Grant's figure the filamentary cavities, in- 

 stead of opening at the anal, open at the oral end of the ani- 

 mal. Imperfect as most of the older figures are, they repre- 

 sent the filaments coming out at the anal end, as they do in 

 the two species I have described. It is not likely so import- 

 ant a part of the animal's organization should be reversed in 

 so remarkable a manner. 



2nd. The ovaries are represented where the filamentary ca- 

 vities are placed in my animals. When the Cydippe is at rest 

 with its filaments withdrawn, the cavities at first glance ap- 

 pear filled with ovaries, and as such I noted them on the sea- 

 shore under the impression that the animal was a true Beroe 

 before I saw it protrude its filaments. Is it not possible that 

 many of the so-called species of Beroe may be species of Cy- 

 dippe with the filaments packed up in the cavity ? The second 

 species did not send out its filaments for a long time after 

 being placed in sea-water, and even then rarely. If Professor 

 Grant's figure be correct, the eggs must be imbedded in the 

 solid substance of the animal ; but it is much more likely that 

 the long filaments are analogous to the ovigerous filaments of 

 the Diphysa and other allied animals, and that in the proper 

 season the eggs are developed in the filamentary cavities. 

 The filaments when ejected are plainly seen to proceed from 

 their pedicles at the bases of their cavities, and not merely 

 from the mouths of the cavities as represented in Professor 

 Grant's figure. 



I have little doubt as to Dr. Fleming's Beroe ovatus being 

 a Cydippe, judging from the imperfect figures in the s Wer 

 nerian Transactions,' vol. iii. 



3rd. The filamentary cavities in Professor Grant's figure 



