THE TARDIGRADA OF THE SCOTTISH LOCHS. 695 
Diphascon chilense—Puate. (Plate IV. figs. 23a-23b.) (5). 
Specific Characters.—Pharynx small, nearly circular, the thickenings short, 
roundish, four or five in each row. Throat and gullet slender. Claws of two nearly 
equal pairs, one claw of each pair somewhat longer. 
This description is based on Piatr’s figure, as he gives no specific characters. The 
Lake Survey specimens were hyaline, and measured about ;}5 inch (227). The short 
diameter of the elliptical pharynx was fully } of the long diameter. There were three 
short rods in each row, with a smaller round nut at each end of the row, the anterior 
one connected with the end of the gullet. 
This species, on which Piare founded the genus, is widely diffused. RicurErs found 
it as far north as Tromso, and it ranges into the antarctic circle. It shows some 
variation in different localities, but not enough to justify the separation of varieties. 
Habitat.—Among moss at the margin of Loch Ness, not in the loch, February 1904. 
Diphascon spitzbergense—Ricuters. (Plate IV. figs. 24a-24b.) (10), (15). 
Specific Characters.—Pharynx narrow, elongate, short diameter 3 to $ of long 
diameter ; thickenings of straight rods—(1st) at anterior end a short rod, (2nd) a longer 
rod, (3rd) a little round nut. Teeth longer and stronger than in D. chilense, nearly 
straight, with strong bearers. Gullet much thicker than in D. chilense, and shorter. 
The specimens taken in Loch Ness, though differing in some small particulars, must 
be referred to this species. The pharynx is relatively broader, but the arrangement of 
rods is identical. The animal is hyaline; the claws two unequal pairs, the longer claw 
of one pair considerably longer than that of the other. 
Habitat.—Loch Ness, March 1904. 
Diphascon angustatum, n. sp. (Plate IV. fig. 25a to 25c.) 
Specific Characters.—Large, hyaline, broadest about the third legs, thence tapering 
to the narrow snout-like head. Pharynx narrow, twice as long as broad ; two slender 
rods in each row—first short, second twice as long. Gullet very short and wide, marked 
by annular rings, very slightly flexible. Mouth and throat wide. ‘Teeth straight, only 
slightly divergent, with or without small weak bearers. Claws two unequal pairs, one 
pair with one claw long and slender. 
Distinguished from PD. spitzbergense by the general form, tapering anteriorly, the 
shorter and wider gullet, still narrower pharynx, and number of pharyngeal thickenings. 
Habitat.—Loch Ness, February 1904. Common. Ricurers has also observed 
this species in Germany. 
