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Ox A New Eotifer, Catbypna ligo2sA. 

 By M. F. Dunlop. 



(^Read Jamianj 18^7/, 1901.) 



Plate 2 (Lower portion). 



The Island of Arran, in the Firth of Clyde, has again yielded 

 a new species to the already large class of Kotifera. Last 

 summer, in the month of July, when on a visit to Machrie 

 on the west side of the Island, I came across, not much above 

 the sea-level, an extensive peat moss in which were numerous 

 pools thick with sphagnum. Taking specimens from several 

 of the pools, I examined them microscopically from time to 

 time, and, amongst several common moss-dwelling animals, 

 observed a form which attracted my attention as ' something out 

 of the usual. Of this form it was very difficult to get a clear 

 view, as it lingered long on the moss leaves. After some time, 

 however, one specimen swam out into an open space and 

 disclosed a peculiarly-shaped appendage. Having no books 

 of reference at hand, I was uncertain whether the specimen 

 was new or only rare, so, carefully preserving the water and 

 moss until my return home, I then searched for and obtained 

 a few living specimens ; but no similar form could be seen 

 portrayed or described in any books in my possession. I 

 therefore concluded that the form might be new, and set it 

 down as belonging to the family Cathypnadae — genus Caihypna — 

 in which view I was confirmed by Mr. Hood and Mr. Eousselet. 

 It thus became necessary to make out the details of the animal's 

 form. 



At first, the peculiar appendage already referred to appeared 

 to be a prolongation of the dorsal plate of the lorica ; this 



