80 MR. J. M. BllOWN ON SOME NEW AND 



All the plates appear corroded and the corners rounded, and cannot be 

 confused therefore with mere foreign grains. Their general appearance and 

 arrangement suggest N. dentistoma and N. vitrcea, from which, however, 

 this species differs in other respects. The mouth-scales are frequently larger 

 than the others, and by their shape give the irregular margin to the mouth- 

 opening. The protoplasm is similar to that of Nebelas generally. The 

 individuals were frequently found encysted. The cysts were spherical and 

 filled with granular matter. The mouth of the test was invariably closed by 

 a laminated diaphragm, formed across the narrowed part of the test^ while 

 the mouth itself generally contained debris. 



Size : length 78-82 /a ; breadth 57-59 /i ; thickness 40 /i; mouth 18-19 /i. 



Though this species is remotely like N. collaris in shape, it cannot be 

 confused with it ; the characters of the mouth and of the test are quite 

 different. It appears more closely related to N. dentistoma or N. vitrcea. 



Nebela bigibbosa, Penard. 



Penard, iu Mem. Soc. pliys. et hist. nat. Geneve, ]890, p. 101 ; and Revue Suisse de 

 Zool. 1905, p. 600, pL 13. figs. 16-19 ; ' British Antarctic Expedition Reports,' 

 vol. i. pt. vi. p. 240. 



N. biffihhosa was originally described by Dr. Penard from material gathered 

 at Wiesbaden. The same observer has more recenlly reported it from 

 Valais, Spitzbergen, and from Vancouver and Victoria, but it never seems 

 to have been found by other workers. The present writer has found it at 

 High Lodore (Cumberland) and again in Glen Eagles (Perthshire), on both 

 occasions amongst ground moss (not sphagnum). It is readily distinguished, 

 not only by its general form but especially by the presence of two tube-like 

 connections passing between the broad faces of the test. Active individuals 

 were found on both occasions. 



Capsellina timida, sp. nov. (Plate 9. figs. 9-13.) 



This species was first discovered amongst moss growing on walls at 

 Ecclesall, Sheffield, in November 1909. Later it also occurred amongst damp 

 moss taken from the outside of a water-trough, also at Ecclesall, in which 

 situation it has repeatedly been found since. In May, 1910^ it was found 

 amongst moss gathered at High Lodore, Derwentwater (Cumberland) . 



The body is ovoid, with a slight narrowing towards the mouth end, and 

 with regularly rounded posterior extremity. It is compressed, more or less, 

 and in extreme cases to almost half its width. The body is covered with a 

 perfectly smooth, clear, transparent membrane. So far as observed it does 

 not undergo deformation, but it seems sufficiently flexible to allow of this. 

 Even under high powers the test appears to be structureless. There is no 

 second external envelope of foreign matter, as is the case with C. hryormn, 

 Penard. The structure and characters of the mouth agree perfectly with 



