642 Transactions of the Society. 



spurs, and egg, are all exactly as in that species. The points of 

 difference are the tubercled skin, more prominent collar, and 

 especially the hanging " dewlap " at the side of the head, over- 

 hanging the first neck segment. Other structures are normal. 



Very abundant in moss from Darjiling, elevation 6000 ft. 



Callidina quadricornifera Milne (6). — Abundant in many col- 

 lections. In most of these it was of a very large size, with strongly 

 stippled skin. The skin of the trunk is very firm and retains its 

 form after death, when the softer extremities have decayed, forming, 

 in fact, a kind of lorica. In these skins the stippling becomes 

 perforation. The teeth are very broad. 



C. papillosa Thompson (10). — Found at three stations, Sinihul, 

 Darjiling, and Baghghora, but rare compared with the next species. 



C. multispinosa Thompson (10). — One of the commonest species 

 in all the localities. The type was rare, but there were a great 

 many varieties, differing in the size, number, and form of the 

 spines, some approaching C. papillosa. The extreme varieties 

 would have been considered as of specific rank, but the great 

 number of intermediate forms made it impossible to give even 

 varietal names to them. 



The commonest variety is figured (plate XVIII. figs. 4a, 4&). 

 The spines are few, the principal anterior and lateral ones have 

 very thick bulbose bases and short points. The short spines on 

 the pre-anal form little fimbriate combs as in P. spinosa Bryce. 

 Teeth 4/4 ; size small. 



Another variety (not figured) has all the anterior spines reduced 

 in size, and those on the pre-anal very conspicuous and single. 



A third variety has the lateral processes on the anterior edge of 

 the trunk expanded into broad ovate bodies, all the other anterior 

 and lateral processes short and thick. 



A fourth variety has all the spines as short as in C. papillosa, 

 but still acute, and the skin not papillose. 



C. pl'icata Bryce (1). — This occurred as a variety, of reddish 

 colour, with the pre-anal processes inconspicuous. The first foot- 

 joint had a dorsal prominence at the posterior margin, not quite a 

 boss. Close above the spurs is a similar dorsal projection of 

 smaller size. Otherwise typical. Darjiling, Baghghora, and 

 Gokdhara. 



Callidina habita Bryce (£). — This species and the variety 

 C. bullata Murray (9) were found in the mixed collection, so the 

 precise locality is not known. The variety is precisely like the 

 examples from Loch Treig. 



C. musculosa Milne (6). — At Baghghora were found several 

 examples which I refer doubtfully to this species. The species 

 seems to have much resemblance to C. symbiotica. 



Rotifer longirostris Janson (5). — The type and several varieties 

 were common in nearly all the collections. The type was commonly 

 much encrusted with extraneous matter, and in some examples 



