PISTILLODY OF STAMENS IN " CHAMPION " POTATO 245 



Triarthra terminalis, Plate. 1 



A solitary specimen of this rotifer was found in sediment 

 of Dundee tap-water. It does not seem to have been hitherto 

 recorded in Britain, and, as Dr. Plate gives no figure, the 

 accompanying sketches may be of interest. I have unfortun- 

 ately no observations on its internal structure. 



Explanation of Plate VIII. 



Fig. I. Notops ftygmceus, n. sp. 



I. a Dorsal view. 



I. b Front view of trophi. 

 ,, II. Copeus Eln-enbergii, Gosse. 



II. a Head with expanded auricles. 



II. b Head with outline of brain. 



II. c Head in lateral view, with retracted auricles. 

 ,, III. Triarthra terminalis, Plate. 



III. a Outline of the same, in contracted state. 



a Antenna. Is Lumbar setse. 



br Brain. It Left lumbar tentacle. 



cv Contractile vesicle. ce (Esophagus. 



e Eye. ov Ovary. 



// Foot. rt Right lumbar tentacle. 



gg Gastric gland. / Toe. 



PISTILLODY OF THE STAMENS IN THE 

 " CHAMPION" POTATO 



By James W. H. Trail, M.A., M.D., F.L.S. 



For several years I have observed every season that pistil- 

 lody of the stamens has been of very frequent occurrence in 

 fields of potatoes near Aberdeen ; and this year it has been 

 extremely common and well marked in numerous fields 

 within a radius of several miles. On inquiry I find that it 

 seems in all cases to be the " Champion " variety that shows 

 this curious sport in the flowers. Mr. Alexander Macdonald, 

 in reply to an inquiry whether he had observed this condi- 



1 Dr. L. Plate, "Beitrage eui Naturgeschichte der Rotatorien" Jenaische 

 Zeitsch. f. Nat. (Bd. \i.\. p. 19, 1SS5.) 



