British Oribatidce : Notes on Neiv and Critical Species. 285 
projection at the shoulders. Lateral margin of the dorsum 
very little deflexed, so that the wide space between the dorsal 
and ventral plates is rather conspicuous. Dorsal hairs few, 
upright. 
West Allendale ; a few specimens only from moss. Two 
or three more from the Derwent Valley, Durham. 
O. plantivaga Berl. 
Abundant in lichen on a cliff wall at Whitley Bay, 
Northumberland. 
DAMxEOSOMA Berlese. 
D. jugorum sp. n. (Plate C, fig. 4). 
Length about 400 /x. 
Very pale ; dorsum rather ochreous, surface rough. 
Abdomen longish oval, slightly narrowed behind, glabrous. 
Lamellae upright blades converging forwards, broadest 
in front. Translamella a vertical blade of uniform height 
(one third that of the fore margin of the lamellae). The 
lamellar cusp is acute and bears a long seta (longer than the 
lamella” itself). Pseudostigmatic organs clavate directed 
forward. 
Legs normal with one tarsal claw. 
Ninebanks and Wooler, Northumberland ; Gibside, 
Durham. In moss and sphagnum, always rare. 
D. vitrixum sp. n. (Plate C, fig. 6). 
Length about 320 /x. 
Pale and glassy. 
Fore margin of abdomen well defined, with a brown rim, 
straight in the middle, decurrent within the shoulders. 
Dorsum broad elliptic with two series of weak hairs. 
Legs rather long ; claws monodactyle. 
Pseudostigmatic organs thickened upwards but acute 
at the extremity, slightly pectinated on the posterior side. 
Lamellae a pair of parallel ridges slightly pigmented, short 
and close together. 
West Allendale, Northumberland ; Derwent Valley, 
Durham ; In moss, rare. 
D. vetula sp. n. (Plate B, fig. 6). 
Length about 310 /x. 
This belongs to the splendens group in which the pseudo- 
stigmatic organs are fusiform-clavate, and there is no pro- 
dorsal pigmented rim. 
Lamellae none ; represented by a pair of median ridges, 
low and rather broad, parallel, unpigmented, about one third 
the length of the cephalothorax. The fore margin of the dor- 
sum is so shaped in the middle that the pair of thoracic ridges 
appear to be continued for a short distance on the dorsum. 
Dorsal hairs few, weak and fugacious. No lamellar or 
1914 Sept. 1 . 
