218 STRETHILL WRIGHT^ ON BRITISH PROTOZOA. 



become so attenuated at their extremities that, like the finest 

 " pseuclopodia" of the Rhizopoda, they can only be brought 

 out by the most careful " black-ground^^ illumination. The 

 animal remains for days with its palpocils sometimes stiffly 

 extended, at other times slightly relaxed and yielding in gentle 

 curvatures to the currents in the water, and again, at other 

 times, all thickened or clubbed at their extremities. When 

 any small animalcule comes in contact with a palpocil it is 

 instantly taken prisoner, and the appendage recoils inwards 

 with its prey to the body of the Zooteirea like a released thread 

 of caoutchouc. In this way the whole of the body is some- 

 times studded with captured animalcules, over which a film of 

 ectosarc slowly creeps and ingulfs them. 



The endosarc consists of exceedingly dense granular sar- 

 code, of a deep-brown colour by transmitted, and silvery 

 white by reflected light. This tissue is more completely and 

 sharply diflerentiated from the ectosarc in Zooteirea than in 

 any other of the Actinophiyans, and appears as a smooth 

 sphere through its more transparent outer covering. I have 

 not been able to discover in it the existence of a nucleus. 



I formerly stated that the stalk was formed of a prolonga- 

 tion of the ectosarc similar to those of the palpocils, but I 

 afterwards found that its tissue had a much greater refractive 

 power, and an examination of an individual in which the 

 appendage had accidentally imbibed, and was distended by 

 water, showed that the stalk consisted of a tube traversed 

 along its axis by a dense muscular band, which was studded 

 with several (nucleolar ?) protuberances, and surrounded by a 

 network of soft (areolar) fibres. After very careful and 

 frequent examination of the muscle, I discovered traces of a 

 canal occupying its whole length, and on one occasion observed 

 a slow flow of fluid and irregularly shaped globules, hke that 

 which takes place in the large pseud opodia of Gromia. The 

 foot of the stalk was found to be buried in a flocculent mass 

 of jelly, often containing great numbers of diatoms and minute 

 algae, and into this gelatinous tube the whole animal was 

 capable of retiring, 



Freya obstetrica and Freya sty lifer, n. sp., T. S. W. (PI. 

 IX) . — Several species of a genus of Protozoa were described 

 by me several years ago under the generic title of Lagotia. 

 It appeared, however, that Claparede and Lachmann had 

 already constituted the genus Freya for animals evidently 

 belonging to my genus Lagotia, in a memoir which they had 

 communicated to the French Academy, which memoir, how- 

 ever, was not published until after the publication of my paper 

 constituting the genus Lagotia. The species of Freya dis- 



