SALPINADJ3. 87, 



contractile vesicle is large, and appears double. When it contracts, its convoluted corded 

 surface seems to go down by the run, in two divisions, right and left of the cloaca. This 

 Rotiferon is very lively, and flits about in the most graceful way, running up the moss in 

 search of food by means of its uncini (Milne, loc. cit.). 

 Length, ^4^ inch. Habitat. Near Glasgow (Milne). 



STEPHANOPS OVALIS, Schmarda (135). See note 1, Sup*, p. 8. 



DIASCHIZA ACRONOTA, Gosse (171), (PL XXXI. fig. 29). 



[SP. CH. Lorica much elevated, heart-shaped in lateral outline ; the dorsal cleft very 

 manifest; head globose, prominent; foot thick; toes stout, long, nearly straight, 

 tapering ; eye occipital, pale, very large. 



This very remarkable form is another novelty yielded by the mill-stream at Kings- 

 kerswell. It seems a very distinct and interesting species ; though known, as yet, only 

 by a single dead specimen, in which the eye and the trophi remained in position. The 

 eye is a remarkable feature, from its great size, irregular shape, and pale hue. It 

 occupies nearly half the vertical depth of the body, of a very pale salmon-red. In all 

 these points it resembles the organ in D. pceta. The mastax is small ; the toes have a 

 backward curve, so slight as to be scarcely perceptible. 



Length, -^ inch. Habitat. Kingskerswell, lacustrine. P.H.G.] 



DIASCHIZA FRETALIS, Gosse (171), (PI. XXXI. fig. 28). 



[SP. CH. Lorica pyriform in outline, viewed dorsally ; gibbous laterally ; each 

 plate cut off obliquely behind, and somewhat excavate ; belly nearly flat ; toes long, 

 blade-shaped, regularly decurved, acute; head furnished with a beak-like projection. 



This form comes very near to D. rhamphigera, but the oblique excavation of each of 

 the dorsal lorica-plates is much more distinct, the frontal beak is more slender, nearly 

 evanescent, and does not appear to be a prolongation of the trophi, which, moreover, 

 are somewhat diversely shaped. There is a red eye on the inner surface of the brain, 

 which I did not perceive in D. rhamphigera ; and, above all, it is marine. 



Only a single specimen has been observed, and that dead ; but so recently as to leave 

 the internal organs and viscera well-defined, and in situ. It was from a tide-pool at 

 Invergowrie. Both species, if they are distinct, require further study. 



Length, y^y inch. Habitat. Marine. P.H.G.] 



DIASCHIZA GLOBATA, Gosse (170), (PI. XXXI. fig. 30). 



[SP. CH. Body sub-pyriform, becoming globose in contraction ; front round, girded 

 by a prominent ring ; lorica dorsally cleft by a wide, but shallow furrow, whose edges 

 rise to slight ridges ; foot stout ; toes slender, produced, acute, slightly decurved. 



The shallow dorsal cleft, having a V-shaped section, is well seen, as the creature 

 crawls about the weeds, the edges turned up slightly ; while the sides of the lorica end 

 ventrally in straight lines, produced behind into small obtuse points. The integument 

 appears sometimes quite flexible. The bluff rounded head, clothed with simple cilia, is 

 surrounded by a prominent ring or collar, not always observable. An occipital brain 

 seems destitute of any eye-spot. The toes are delicately attenuated to long points, 

 which, more generis, are often thrown back, though the points are decurved. 



The little animal is active and restless, moderately swift in swimming, with frequent 

 augmentations of speed, sudden and sustained. It soon dies in a live-box ; and, in 

 dying, usually contracts itself into a globular form. Sometimes it spins swiftly round 

 and round, in a circle of which the toe-tips are the centre. I have examined some eight 

 or ten specimens, all in water sent by Mr. Hood from his aquarium at Dundee. 



Length, 5 -J- - inch. Habitat. Dundee, lacustrine. P.H.G.] 



