8 THE ROTIFEEA. 



into two equal branches, each cariying a pair of unequal toes (fig. 6 b) ; the outer of 

 which is the larger of the two. It is a fine handsome Rotifer, and not restless ; so that 

 its structure can be easily observed. 



Length, ^J^ mch. Habitat. Neighbourhood of London (G. Western). 



Philodina MICE0P9, Gosso (171), (PI. XXXI. fig. 1). 



[SP. CH. Body very slender, closely resejnhling Eotifer vulgaris, both in form mid 

 manners, but with eyes distinctly pectoral, small, round, of very 'pale red hue. Column 

 thick, rounded, ivith minute hooked inoboscis at front ; spurs rather small, separated 

 by a horizontal edge ; corona in action not wider than head. 



This can scarcely be confounded with any recorded Philodina. For some time I 

 felt sure it was Botifer vzdgaris. and marvelled that I could not see the eyes in the 

 column. But when I looked to the pectus, they were plain enough, though very pale. 

 I know no other species, whether of Rotifer or Philodina, with so very small a corona 

 in rotation. The whole trunk is fluted. The viscera are tinged with pale smoke-brown, 

 deepest in the abdominal canal. In some examples the hue is rather of a chestnut- 

 brown. 



I have examined perhaps half-a-dozen specimens, inhabiting the conferva of marine 

 rock-pools in the Firth of Tay. The species is very shy of rotating, thus difi'ering from 

 other PhihdincB, which are characteristically free. At the moment of extruding the 

 column, its broad extremity opens a central orifice which is strongly ciliated around its 

 margin, while a row of cilia, apparently /ew and distant, is seen fringing the outer edge. 

 The antenna consists of (two '?) telescopic joints, its dilated extremity carrying four 

 divergent setfB. 



Length, ^ inch. Habitat. Firth of Tay. P. H. G.] 

 P. coLLAEis, Ehrenbcrg (42)=P. cry throphth alma (vol. i. p. 99). 



P. SETiFEBA, Schmarda (135), (PI. XXXII. fig. 7), is said to have a row of setie run- 

 ning down the foot, of which I give Schmarda's figure. 

 P. GBACiLis, P. CALCAEATA, P. MACEOsiPHO, ScSuiiarda (184). Scc note below.' 



RoTiPEE TEiSECATUS, Wcbcr (199), (PI. XXXII. fig. 9). 



SP. CH. Body a dull grey ; skin rough, with longitudinal and transverse folds, 

 so as to form txvclve apparent segments ; a coarse fold near the neck. Body elongated, 

 cylindrical, diminishing suddenly ; truncated, at the level of tlie anus, to form a foot 

 narrower than the rest of the body; proboscis long; eyes tivo ; coronal \ohes short ; 

 teeth two; pharynx stout; intestine generally coloured brown; spurs movable at 

 their extremity, long and slender ; three long, slender toes, divided into three segments. 



This Rotifer is rendered distinct from others, by the exaggerated length of its spurs 

 and toes, and by the division of the latter into three johits, of which the last is capable 

 of a feeble motion. The corona when expanded is scarcely wider than the neck ; the 

 proboscis is stout, cylindrical, long, stretching much beyond the expanded corona, and 

 seldom retracted even when the corona is in action. It bears two ovoid eyes. Unlike 

 that of other species, the end of the foot is usually extended, showing the three toes.^ 



Length. About double that of B. vulgaris. Habitat. Near Geneva (Weber). 



kindly sent me many living specimens, had noticed the same thing. Mr. D. Bryce, also, some time ago, 

 forwarded to me a sketch of tubercnlala' s four toes. 



' Both of Schmarda's pamphlets (134) and (13.5) contain species said to be new, but so drawn and 

 described that it is not possible to do anything else than omit them. 



^ There is, in the description of the figures, a confusion of terms similar to that in Limnias granu- 

 Insns. Fig. 2, PI. XXX., in M. Weber's pamphlet, is said to represent the dorsal surface ; and the bent 

 foot in it is said to be showing its ventral surface ; and yet that surface is the one that bears the spurs, 

 and consequently is really the dorsal or anti-oral surface. To make it moie perjilexing, the proboscis 

 seems, in the figure, to be on the opposite surface to the spurs. 



