GO THE ROTIFE]IA. 



E. ciMOT.irs, Gosse, sp. nov. 



(n. XX. fig. 1-1.) 



[SP. CH. BoAy arched, 2^araUel-sicled; skin flexible; brain opaque; toes sliort, 

 blade-like, deeitrved ; no sub-styles. 



The brain, descending far into the occiput, is furnished at the end with a large and 

 opaque chalk-mass. This I have signified in the specific name, from Ki/xiaXia =■ chalk. 

 Its component cells are very distinct at the lower margin, which is sub-truncate. When 

 the fore-parts are retracted forcibly, as is frequently the case, the conspicuous chalk- 

 mass will sometimes reach to two-thirds of the entire length, displacing the 

 viscera. A pair of small auricles are occasionally thrust out (fig. 14), without any 

 sensible augmentation of speed, while the animal pushes through sediment. I have 

 looked in vain for an eye, though it may have been concealed by the opaque cells. The tro- 

 pin (figs. 146, c) exhibit the virgate pattern common in the family. The toes are short 

 compared with those of tigris, decurved ; set side by side, and widely expanded (fig. 14). 



This seems a quite distinct little species, there being no other with which it can be 

 confounded, on examination. The specimen described was in the bottle with which 

 Dr. Collins favoured me in June 1885. Its movements were by no means rapid, but 

 persevering, forcing its way incessantly through the leaves of water-moss and sedimentary 

 floccose. I have lately found a second in water from Mr. Bolton. — P.H.G.] 



Length, aJ^ inch. Habitat. Sandhurst, Berks; Kingswood Pool, Birmingham 

 (P.II.G.). 



R. CALYPTUS, Gosse, sp. nov. 

 (PI. XX. fig. IG.) 



[SP. CH. Body and toes as in cimolius ; brain clear ; ia.ce furnished with pendent 

 veil-like lobes of flesh. Marine. 



This has much resemblance to B. cimolius, but it is larger, and the brain-sac is clear, 

 not opaque. No eye has been visible : the toes are of like dimensions, pattern, and dc- 

 curvation. A remarkable peculiarity is that in the front a thick and broad veil of trans- 

 parent flesh hangs down, apparently bilobed, meeting another great lobe of like appearance 

 from below. The function of these lobes I do not know. The body is cylindric, with 

 no visible dorsal ridge. The mastax and troplii conspicuous, but ill-defined. An ample 

 brain descends with a point into the occiput, with neither chalk-deposits, nor eye. A 

 long and slender oesophagus leads to an ample alimentary canal. The ovary occupies 

 the ventral region of the cavity ; and a moderate contractile vesicle is behind all. 



A single example of this charming little Battulus 1 found in October 1885, with many 

 other species of Rotifera, in sea-water, procured for me by Mr. Hood from the tide-pools 

 of the Firth of Tay. In manners it was sluggish, contracting and lengtliening itself 

 with uniform persistence without changing its place. It was of hyaline transparency 

 and colourlessness. — P.II.G.] 



Length, -^l^ inch. Habitat. Tide-pools on the Scottish coast (P.II.G. ). 



E. SEJUNOTiPES, Gosse, sp. nov. 

 (PL XX. fig. 15.) 



[SP. CH. Body projectimj viuch above and behind the foot ; toes tivo, coequal, 

 slender, decurved, set side by side, wide apart. 



Of this remarkable species Dr. F. Collins has made several graphic sketches in his 

 Note-book. It is of the lunaris form, stout, plump, and curved ; the foot consists of a 

 great basal bulb, wholly internal, and a second joint, thick and short, to which are arti- 

 culated two toes ; these are acute slender styles, so curved as to contume the outline of 

 the body, mutually equal, set on the same plane, but (which is most unusual) twcfeo^jn;-*. 



