688 MR JAMES MURRAY ON 
uniform granules. It is a curious fact that the perforations have a quite different size 
and arrangement from the granules, so that they could not be derived from them, as” 
was supposed to be the case with a similar form of E. spitzbergensis. (Plate II. fig. 7a.) 
Echiniscus, sp.? (Plate II. fig. 10a.) 
Two lateral setae (one after the plates of the first pair). Dorsal seta on plates of 
first pair, short broad spine on plates of second pair. Spine on front leg. Fringe. 
Inner claws barbed. Nearest /. aculeatus, differs in lateral process not double. (5). 
Loch Ness, November 1908. 
Two-CLAWED LARVA. 
Three larval forms having two claws were seen. ‘Two of these are referred to under 
the species to which they are supposed to belong (H. wendti, E. granulatus). The 
third could not be identified. 
Echiniseus, sp.?, larva. (Plate II. fig. 11.) 
Plates ten, arrangement normal. ‘Three lateral processes—a short curved spine on 
plate of second pair, a longer seta at junction of tail-piece and lumbar plate. No 
dorsal processes. Granules moderate. Fringe of longish blunt spines. Claws two, the 
barbs large. Blunt palp on last legs. Mouth palp appears to spring from elongate 
curved process which bears the anterior mouth seta. Size ;3, inch. 
Shore of Loch Ness at Fort Augustus. 
MAacRoBIOTUS. 
Generic Characters.—Obscurely segmented, without hardened dorsal plates. Claws 
four, united in pairs, or one pair and two free claws. Teeth with bearers; gullet short, 
rigid. Pharynx with several rows of hard rods or balls. 
The genus Doyeria cannot now be maintained, as it has been shown by RicHTERS 
that most (and probably all) species of Macrobiotus may get into a condition in which 
the teeth are as in PLatr’s genus Doyeria. The distinction of the genus Diphascon is 
also a slender one, there being intermediate forms between it and Macrobviotus. 
The species of Macrobiotus are distinguished by the form of the claws, the texture 
of the integument, and the number and arrangement of the pharyngeal thickenings. 
The last character is most reliable, but in many individuals its value is lessened by 
a curious reduction of parts which takes place. The eyes are of little importance, as 
