694 MR JAMES MURRAY ON 
the Scottish Lakes than have been recognised, as several forms of eggs have been found - 
which cannot be identified as those of any known species. Five forms are here figured, — 
only two of which can be named. The others are not proven to be even Tardigrade 
egos, but they are so similar to eggs of known species as to leave little doubt on the 
matter. 
M. hufelandi—-C. Scu. (Fig. 18.) (14). 
Processes narrow, tapering, expanded at ends into discs. There is a good deal of 
variation in the size of the eggs, and in the size and spacing of the spines. 
Loch Ness and Loch Morar, common. 
M. echinogentus—-RicutErs. (Fig. 21.) 
Processes conical, acuminate, papillose, the long poimts usually curved over (in 
Scottish examples). There appears to be even more variation than in M. hufelandi, 
according to RicuTers (14). Since, as he says (10), the two species can hardly be ~ 
distinguished except by the eggs, it may well be contended that some of these varieties — 
of eggs represent equally good species. 
Loch Morar, very abundant. 
Macrobiotus, sp.? (Fig. 19.) 
Possibly a variety of M. echinogenitus, but more probably distinct. Loch Morar. 
Macrobiotus, sp.? (Fig. 20.) 
This beautiful egg is also possibly a variety of M. echinogenitus. It is most like 
RicHTERs’ variety with blunt processes (14), but they are here acuminate. Loch Morar. 
Macrobiotus, sp.? (Fig. 22.) 
Conical processes close together at the bases. Loch Ness. 
DIPHASCON. 
Generic Characters.—Gullet elongated between the teeth and the pharynx into a 
flexible tube ; otherwise as Macrobiotus. 
In those species which have the flexible gullet well developed this seems to be a 
sufficiently distinct genus, but it is connected with Macrobiotus by D. angustatum, m 
which the flexible portion is very short and hardly distinguishable, and the two genera 
may have to be united. All the species known to me are destitute of eyes. Teeth- 
bearers are usually present, but they are often weak, and in D. angustatwm they are 
frequently absent. 
