SCOTTISH TARDIGRADA 93 



Length 240^. Lateral processes nearly equal, from 35 to 

 45/y, in length; dorsal spine over i; 3o/x, over d, 20^. 



Related to E. oihonna, Richters (11), which has the same 

 number of lateral processes, and the same sub-lateral spicules, 

 it differs in the following points. R. oihonna has the lateral 

 processes of very long seta and moderate spines or setae, alter- 

 nating, c and e are very long, and the process over c is a hair 

 of moderate length. E. tympanista has the lateral processes (>, 

 f, d, and e, and the dorsal process over L \ all similar, short 

 thick processes ending in knobs, like drumsticks, hence the 

 name. 



Habitat. Loch Morar. 



Mcicrobiotus orcadensis, Murray (8). Hitherto only known in one 

 spot, the top of Ward Hill in Hoy, its range has been extended 

 by its recent discovery (19 10) on the summit of Snowdon. 



M. coronifer, Richters (11).- The record of the egg of this species 

 for Ben Lawers (7) being made in error, the only British record 

 of the animal is that for Shetland (Ronas Hill). 



M. montanus, Murray (10). The identification being made from 

 the egg only, there is a certain doubt about it. Ben Lawers, 

 1906. The species was described from New Zealand specimens 

 in 1910, but the egg was known long before, both in Scotland 

 and Novaya Zemlya. 



M. areolatus, Murray (9) (10). This was described as an arctic 

 variety of M. echinogenitus, Richters (11), in 1907, and was 

 recorded for Scotland as var. areolatus in the same year. It 

 was first recognised as of specific rank in 1910, and described 

 in a paper on Canadian Tardigrada (10). India, Africa, 

 Australia, New Zealand, Ascension, Comoro, etc. 



M. oberhauseri, Doy (1). The record for Scottish lochs, 1905 (6), 

 is doubtful, that of 1907 (8) is wrong. The animal figured in 

 the latter paper is almost certainly a form of M. arcticus. The 

 true oberhauseri occurs at Fort Augustus. 



M. arcticus, Murray (9). After experience of this species in the 

 Antarctic, I believe that the animal figured in 1907 (8) as M. 

 oberhauseri is simply M. arcticus with its thinner-shelled 

 summer eggs (10). Loch Ness. 



M. schaudinni, Richters (16) (Plate I. Figs. 3^, 3^). Elf Loch, 

 near Edinburgh (W. Evans), Nov. 1905 ; near Glasgow; Wig- 

 tonshire ; Loch Morar. This Arctic species was not described 

 for some years after the drawings were made, on which these 

 Scottish records are based. Spitsbergen. 



M. lacustris, Duj. ? (3). Loch Ness, 1906. I consider that M. 



