SCOTTISH ALPINE TARDIGRADA 27 



species, was found, differing only in the shorter head seta, and 

 the moderately large granules on the plates. A similar 

 variation in the size of the granules has been seen in E. 

 mutabilis. 



E. sp. ? larva. Broadest at head, plates 9 (2 median), 

 head seta long, short curved seta at tail-piece, fringe of sharp 

 spines on 4th leg, all claws with moderate sized curved barbs, 

 granules of moderate size. Claws two. 



Genus MACROBIOTUS. 



M. hufelandi, C. Sch. (3) (6) (7). In little peaty pool near the 

 summit. The typical form of the egg was also in this pool 

 (Fig. 1 8). 



M. echinogenituS) Richters (5). According to Richters the animal is 

 scarcely distinguishable from M. hufelandi. There are probably 

 some little differences in pharynx or claws, but the opportunities 

 for proving the connection between an animal of this section 

 of the genus and the spiny eggs which they lay are very rare. 

 Well-grown eggs may be seen in the body, but they are not 

 spiny. The spines would appear to develop at a late stage, 

 just before deposition. The commonest form of the egg, with 

 acuminate spines curved at the top, was in the peaty pool. 

 There was also a variety with the basal part of the spine nearly 

 hemispherical, the points longer (Figs. 13, 14, 15). 



M. ornahts, Richters (4). Neither the type nor any of Richters' 

 varieties was found, but a variety having many transverse rows 

 of short, straight, equal spines (Fig. 4). It was longer than is 

 usual, and may possibly be distinct. The pharynx and claws 

 were typical. Length, 300 p.. 



With this was a glabrous variety which I provisionally 

 unite with this species (1, p. 691), having neither spines nor 

 papillae, but the typical pharynx with three roundish nuts in 

 each row. One example had a short flexible portion of the 

 gullet, as in Diphascon (Fig. 5). 



EGGS OF MACROBIOTUS. 



Eggs of animals of this genus were found in considerable variety 

 Many of them could not be assigned to any known species. The 

 number of forms of spiny Tardigrade eggs which have already been 

 found in Scotland compels us to suppose that there are many species 

 still undescribed, or that the eggs are variable in form. While 

 considerable allowance must be made for variability of the spines, 

 my experience leads me to expect that many of the varieties will be 



