THE ZOOLOGIST 



No. 887.— May 15th, 1915. 



NOTES ON THE FAUNA OF THE COUNTRY OF 

 THE CHESS AND GADE. 



By T. E. Lones, M.A., LL.D., B.Sc. 



(Continued from vol. xviii., p. 461.) 



Several species of bdelloid Rotifers from the country of the 

 Chess and Gade have already been dealt with, and a few others 

 will now be described. The identification of species of bdelloid 

 is more difficult, as a general rule, than that of other species of 

 Rotifers. Further, among the bdelloid Rotifers, I have found 

 most difficulty with species of the genus Callidina, but I have 

 examined many specimens sufficiently to satisfy me that they 

 belonged to Gosse's C. bidens, and also many specimens which 

 could apparently be none other than Gosse's C. bihamata. 

 Another bdelloid Rotifer which will be described is Adineta 

 vaga, Davis. 



39. Callidina bidens, Gosse. — All the specimens so far ex- 

 amined were from moss, and the best and most numerous were 

 obtained on November 3rd, 1912, from moss growing in the lane 

 leading from Abbot's Langley to Upper Highway, and from a 

 much more luxuriant growth of moss near the western end of 

 the lane from Dudswell to Champneys on September 30th, 1913. 

 During the examination of these Rotifers, their movements were 

 so rapid that they seemed to glide over the surface of the glass. 

 Occasionally they drew in their long oral ends, expanded their 

 wheels, and swam through the water, and their wheels were kept 

 expanded when the Rotifers anchored themselves to the slide. 

 Their bodies were somewhat slender and spindle-shaped, and, 

 Zool. 4th ser. vol. XIX., May, 1915. o 



