92 Mr. Patterson on the Cydippe Pomiformis. 



The ensuing summer I again visited the same locality, and had the pleasure 

 of taking a Beroe similar in size to the one formerly described, but exhibiting 

 very conspicuously an arrangement of whitish coloured vessels, v?hich had their 

 origin near the lower part of the stomach, and branched off to the several bands 

 of cilia, one vessel running out to each band, and joining it not very far from the 

 centre. 



On the 24th of June, 1837, I was again at the Corran, and succeeded not 

 only in taking three Beroes, exhibiting this singular structure, but with the 

 assistance of a friend was enabled to have it delineated. These drawings were 

 unfortunately mislaid before any more finished representation could be executed. 



On the 8th of the next month, in Strangford Lough, I again took an indi- 

 vidual of the same description, but the circumstances under w^hich I was then 

 placed, prevented its being subjected to any critical examination. 



Its occurrence on so many different occasions excited the hope that it would 

 again be met with ; and when at the beginning of June, 1838, I returned to my 

 former lodgings at the Corran, I felt desirous of being able to observe its pecu- 

 liarities, and ascertain its species. This desire was augmented by a careful 

 perusal of Doctor Fleming's paper, read before the Wernerian Society of Edin- 

 burgh 18th November, 1820, in which he describes a BeroS, subsequently 

 designated, in his History of Bristish Animals, B. ovatus. This animal ap- 

 peared to be furnished with vessels similar to those I had observed, but it 

 differed from mine in being destitute of tentacula. The following is an extract 

 from Dr. Fleming's description : 



" The tube which conducts from the mouth to the centre of the body, and 

 is prolonged in its axis to the summit, had on each side a compressed organ 

 adhering to its walls. These terminated in the centre, each in an ovate head, 

 apparently containing air. Immediately below each head, there were numerous 

 twisted vessels, some of which contained a reddish fluid. The tube which 

 descended from the summit, as it approached the centre, suddenly expanded, and 

 sent off a branch to a vesicle on each side, after which it appeared to unite with 

 the one from the mouth. Each of the lateral vesicles terminated below in a blind 

 cavity, which contained a glandular body, to the upper surface of which several 

 white threads were attached. The upper extremity of each vesicle was open, 

 and terminated on the surface on each side, in the space between two ribs. 



