MELICERTADjE. 85 



forms a rectangular bundle that is characteristic of the species. The foot is unusually 

 long and slender. Two red eyes are distinctly visible in the adult, just below the surface 

 of the corona. 



length, T V inch. Habitat. Ponds at Snaresbrook, Essex (F. Oxley) ; and Sutton 

 Park, Birmingham (A. W. Wills) ; Woolston, Cheltenham (P.H.G.) ; marsh pools, Perth 

 and Fife (J.H.) : rare. 



(E. STYGIS, Gosse, sp. nov. 

 (PI. IX. fig. 8.) 



SP. CH. Corona circular ; dorsal gap not perceptible ; ventral antennae mere tuber- 

 cules. Of large dimensions. 



[I found this fine species on September 18, 1885, among impalpable floccose vegeta- 

 tion sent me by Mr. Hood from the Black Loch, near Dundee ; a habitat which has 

 suggested a fanciful appellation, and which it shares with its neighbour and rival 

 (E. brachiatzis. It equals that species in size, being about ^ inch in height when 

 expanded ; its beautiful clear corona, of exquisite rotundity, being T ^y inch in diameter. 



The corona is strengthened with thick divergent ribs, very visible when viewed 

 obliquely or nearly laterally ; but, in a direct front view, these disappear, and the 

 hyaline disk looks like a circular plate of clear glass, marked by a few almost invisible 

 curves. There are no antennae proper ; a pair of minute knobs marking their place. 

 But for this, it might be mistaken for (E. umbella. I saw no trace of eyes. The body, 

 of the usual form, contracts to a long and slender foot ; which, at its pedal extremity, 

 dilates into a minute cubical knob, which adheres to a little heap of floccose. A tube 

 of loose gelatinous matter, of brownish hue, surrounds the body, of such a thickness 

 that its diameter is about twice that of the corona. It is undefined to the eye, but 

 carries an agglomeration of extraneous matters entangled in its substance. P.H.G.] 



Length, -$ inch. Habitat. Black Loch, Dundee (P.H.G.) : rare. 



Genus LACINULAEIA, Schweigger. 



GEN. CH. Cluster fixed, of many individuals, with adhering gelatinous tubes ; 

 corona heart-shaped, oblique, with its longer axis placed dorso-ventrally , and a deep 

 ventral sinus ; dorsal gap in the ciliary wreath very minute ; trunk ivithout opaque warts ; 

 dorsal and ventral antennae absent. 1 



L. SOCIALIS, Ehrenberg. 

 (PI. VIII. fig. 1.) 



Lacinularia socialis . . . Ehrenberg, Die Infus. 1838, p. 403, Taf. xliv. fig. 4. 



... Leydig, Sieb. u. Roll. Zeits. Bd. iii. 1851, p. 452, Taf. xvii. 



... Huxley, Trans. Micr. Soc. vol. i. N.S. 1853, p. 1, pi. i. 



pi. ii. figs. 20-25. 



,, ... Pritchard, Infusoria, 1861, p. 671, pi. xxxvii* figs. 19-25. 



Megalotrocha socialis . . . Gosse, Popular Sci. Rev. vol. i. 1862, p. 494. 



Lacinularia socialis . . . Cubitt, Mon. Micr. J. vol. viii. 1872, p. 9, pi. xxiii. figs. 3, 4. 



,, ,, ... Hudson, Mon. Micr. J. vol. xiii. 1875, p. 45, pi. xci. fig. 8. 



... Bartsch, Rot. Hungaria, 1877, p. 19, Tab. i. fig. 1. 



This common and very beautiful Eotiferon, the only known species of the genus, is found 

 adhering in clusters, like little balls of grey jelly, to the stems and leaflets of pond- weeds. 



1 Possibly they may be very minute setigerous pimples, which have escaped observation. 



