Mr. Patterson on the Cydippe Pomiformis. 109 



EXPLANATION OF THE PLATE 



ILLUSTRATIVE OF THE APPEARANCE AND STRUCTURE OF CYDIPPE POMIFORMIS. 



Fig. 1. — Magnified representation of this Beroe in the act of revolving on the 

 longitudinal axis of the body. 



2. — Internal structure, exhibiting the form and position of the sheaths of 

 the tentacula, and arrangement of the ramiform vessels communi- 

 cating with the several bands of cilia. 



3. — The same vessels as viewed vertically ; the dotted figures mark the 

 outline presented in this position by the sheaths of the tentacula. 



4. — Anal extremity of the body, with the transverse transparent membrane, 

 and part of the several bands of cilia. 



5. — Membranous lobes surrounding the mouth. 



6. — Cilia represented in motion. 



7. — Cilia of another individual when at rest. 



8.— Cilia of C. Pileus ; copied, for comparison, from the Zoological Tran- 

 sactions, vol. i. plate 2. 



For the original drawings, which are taken from living specimens, I am 

 indebted to the kindness of my relative, B. J. Clarke, Esq. of La Bergerie, 

 Portarlington, with whom I had the pleasure of repeating many of the observa- 

 tions recorded in the present paper. 



The Beroe is represented of about three times its natural diameter. 



