THE TARDIGRADA OF THE SCOTTISH LOCHS. 687 
I identify as this species an animal rare in Loch Morar. Though differing in some 
details from Mr ScourFigtp’s species, I do not think we would be justified in separating 
it, considering that there were no eggs seen in either case, and in view of the great 
change in the size of the processes which takes place during development. Only empty 
skins of the Loch Morar animal were seen. In place of the granules the plates were 
covered by large quoit-like rings, the centres perforate, which | believe to originate in 
the decay of the granules. They further differed in the dorsal spines on the second 
pair of plates being long, and the small spines of the same plates lacking. The lateral 
sete, a, b, c, d (RicHTERS), increase in size from a to d, which is very long. The 
_ lumbar plate is trefoliate ; in ScouRFIELD’s examples, entire. 
Length, Loch Morar examples, 735 inch (250). 
DouBTFUL SPECIES. 
Many examples of Hchiniscus have been found which, while differing more or less 
from the descriptions of all known species, could not, in the absence of eggs, be 
certainly identified, or regarded as distinct species. They are figured here, with short 
descriptions, as an assistance to other observers. All were sufficiently large to be 
regarded as probably nearly full grown, though size is not a quite safe criterion of age. 
Echvmscus, sp.? (Plate II. figs. 8a—8b.) 
Plates ten, normal. Lateral sete five, increasing in length from front to back. 
Dorsal processes—a long seta on the first paired plates, a short knob on the second pair. 
Fringe on last legs. Mid claws barbed. Granules of moderate size. The section of 
the genus having five lateral processes contains about a dozen species. Some of them 
(Z. duboisi, E. conifer, E. spinulosus, E. othonne, etc.) have very distinct characters. 
If we bear in mind the elongation of the processes during development, many of the 
other species will appear less certain, and it is noteworthy that the eggs of most of these 
are unknown (14). Some of the forms having fewer lateral processes may be younger 
stages of the same species. This and the two following forms belong to this section, 
differing mainly in the proportions of the processes. 
Loch Ness, at pier, 7th February 1904. 
Echiniscus, sp.? (Plate II. figs. 9a—9b.) 
Plates normal. Four of the lateral processes are long spines (? setee) with bulbose 
bases. Dorsal processes—a long spine on the first paired plates, a very short broad 
Spine on the second pair. Granular or perforate. This form, with small perforations, 
as shown in fig. 9c, was frequent in Loch Morar, and was regarded as a distinct species 
till another form was observed, identical with it in all else, but with fairly large 
