^8 Mr Patterson o?i a Species ofBeroe 



several filaments of each cilium are not connected together by 

 any membrane. They are totally distinct, very numerous, ta- 

 pering, and slightly recurved towards the extremity. Along 

 each band a cord or slight ridge extends, dividing it longitudi- 

 nally into two equal parts. The filaments on each band consist, 

 therefore, of two parcels totally detached. The parcels, which 

 correspond in situation, move in general at the same time. The 

 motion, however, is not always simultaneous ; each portion seems 

 to possess a separate and independent power of motion, and hence, 

 while one portion is vibrating in the usual manner, the other 

 may be seen moving more slowly, or perhaps perfectly at rest. 

 The length of the cilia at the outer edge in each row, is precisely 

 the same as the distance from the one row to that immediately 

 above ; it is greater, however, towards the centre, and hence the 

 base of the cilia in the middle of the row is overlapped by the 

 extremity of those beneath. 



The stomach appears to consist of two membranous plates 

 joined at their edges, and capable of being extended, so as to in- 

 close an almost circular space. In general, however, they are 

 so nearly together that they present very different appearances 

 in different positions. The upper edge of each membrane is di- 

 vided into two semi-circular lobes, and these are constantly vary- 

 ing, both in the extent to which they are protruded and that to 

 which they are distended. It is seldom they are porrected to 

 their full extent, but, when so, they produce so great a change 

 in the oval form which the animal generally presents, that they 

 make its outline appear like a miniature representation of one of 

 those old fashioned bottles which we see in the pictures of the 

 Flemish, the short neck of the vessel being generally uppermost. 

 The mouth and oesophagus, as Dr Grant has observed, are 

 wide, and the stomach extends to the centre of the body. These 

 parts, I am inclined to think, are capable of considerable disten- 

 sion. My attention was directed to this circumstance on the 

 first evening that any heroes were taken. With them I found 

 in my net a large number of Crustacea of a bright green colour, 

 and from a line to a line and a half in length, which, on subse- 

 quent examination, have proved to be some undescribed species 

 of Cyclops. They were placed in a glass jar with the heroes. 

 In the course of an hour afterwards, when candles were brought 



