THE TARDIGRADA OF THE SCOTTISH LOCHS. 691 
Macrobiotus ornatus—Ricuters. (Plate LIT. figs. 18a to 13c.) (8). 
Specific Characters.—Glabrous and spineless, or finely or coarsely papillose, covered 
with large granules on the back, or with many rows of long spines on the back and 
sides. With or without eyes. Teeth somewhat weak, slightly curved, with bearers. 
Pharynx circular, thickenings three in each row, round or nearly so. Claws, two 
similar pairs, one of each pair longer. 
I follow Ricurers in making the verrucose and spiny forms mere varieties of one 
species, although I have seen no intermediate varieties, and would have regarded them 
as distinct. As a logical consequence, the glabrous form must also be united with them. 
Of the three varieties, the warted one is largest, and is the only one possessing eyes 
(in Scottish examples). The spiny form has only been found in ground moss and in 
ponds, not yet in lakes. The other two varieties are lacustrine, the glabrous one being 
very frequent at lake margins. 
Glen Roy, 1902—pond at Fort Augustus (var. spinoszssimus); Loch Ness (vay. 
verrucosus) ; Loch Ness, Loch Morar, Loch Treig, smooth variety. 
The eggs have not been observed in Scotland, but Ricaters found them in the 
cast-off skin. 
Macrobiotus annulatus, n. sp. (Plate ILL. figs. 14a to 14c.) 
Specific Characters._Skin pale yellow, stomach brown. All papillose except face 
and distal portion of legs. Papillee large, round, equal; on back and sides arranged in 
regular lines running round the body, but lost on the under surface. The usual apparent 
seoments of Macrobiotus here divided into lesser segments, on each of which are two or 
three of the rows of tubercles. Two black eyes. Teeth strong, curved, with bearers. 
Pharynx nearly as broad as long, round or slightly cordate. Two narrow rods in each 
row, and a lesser round nut next the end of the gullet. Claws, two pairs slightly 
united, one claw of each pair longer than the other. Longer claws, with fine 
supplementary points. 
Reproduction.—Three elliptical eggs are usually laid in the moulted skin; they 
measure about s3$, inch (67) long. A curious habit prevails, which I have not 
observed or heard of in any other Tardigrade. The skin is not completely moulted, but 
remains attached to the front of the head, and is carried about, with its contained eggs, 
for a long time, in some cases till the egos hatch. As all my observations were made 
upon animals kept in captivity, and therefore under conditions different from those 
to which they would be subjected in their natural home, we cannot be sure that this 
habit is normal. It is noteworthy, however, that on every occasion when it was 
observed the eggs were thus carried, and other species kept in the same way did not do 
so. It was under almost continuous observation for more than a year, and many 
hundreds of examples were seen carrying the skinful of egos, and the practice was 
repeated by successive generations. 
