DAVID BRYCE ON THREE XEW SPECIES OF CALLIDINA. 36 & 



interspace. Egg oval, smooth, slightly produced, or with low 

 prominence at one or both poles. 



In the genus Callidina as now restricted, species with a narrow 

 or small corona are few in number. In the course of examining 

 wall and ground mosses from various localities, I have found 

 several series of examples which agreed approximately in the 

 above characters. My sketches of these animals show them as 

 somewhat dissimilar in their feeding position, but the diiBTerencea 

 seem to arise only from small variations in the relative distance 

 of the pedicels, in the position and separation of the spurs, and 

 in the size of the rotifer. I cannot find that any of these 

 slightly differing forms have been hitherto described, and I have 

 therefore selected the largest, which I have met with on several 

 occasions, to be the type for a new species. 



It is of moderate size, intermediate between C. habita and 

 C. nana, both in length and stoutness. With the exception of 

 the head and neck, which are rather less stout than is usual in 

 the genus, the general structure is quite typical. The dorsal 

 antenna is moderately short, about one-third of the neck width. 

 I could not definitely see more than three foot joints, but in some 

 cases I thought there were probably four. It is rather active in 

 its movements when disturbed. 



Maximum length, about 330 /a; in feeding position figured, 

 about 285 /x j corona, width 41 /x; collar, 38 /x; neck, 32 /x, ;. 

 spurs, 8/x. 



Habitat, in ground or wall mosses. 



Callidina decora sp. nov. (PI. 12, Fig. 3). 



Specific Characters.Oi medium size and stoutness. Corona 

 ample. Upper lip undivided, rising in a low curve, showing high 

 nexus between divergent pedicels, widely separated. Rami with 

 two to three teeth. Spurs short cones with moderate inter- 

 space. 



Several examples of this moderately large form were obtained 

 from moss growing on rocky outcrops near the top of Ben 

 Yrachie, in Perthshire, in 1907. When creeping about they did 

 not show any salient peculiarities, but in the feeding position 

 the unusual form of the upper lip attracted attention. When 

 feeding, the animals assumed a semi-squatting, rather trim and 



