(i. \VE.->TER\ OX IJUTIFKK'S. ir>9 



Battubis hicornis (sp. nov. mihi). 



Sp. Char. : Body fusiform, with two equal occipital spines ; 

 toes two stylate, equal ; substyles two ; brain clear. 



This little fellow I found at Roehampton, but although ap- 

 parently undescribed, I learn that it is common also in Scotland 

 and Ireland. Its distingaishing feature is the presence of the 

 two equal spines on the occipital edge of the lorica. The whole 

 lorica has also a twisted appearance, and the method of swim- 

 ming is peculiar. The trophi are of the usual asymmetrical 

 virgate pattern, and its internal economy being as ordinary in 

 members of the genus, needs no comment. 



Length about yjoin. 



Habitat — Pond near Roehampton, Scotland, Ireland ; 

 common. 



Callidina sordida {sp. nov. mild). 



Sp. Char. : Body fusiform, depressed, with alternate enlarge- 

 ments and contractions ; opaque ; greyish brown ; much 

 corrugated and covered with adhering foreign matter ; teeth 

 two ; foot short and thick ; spurs long and flexible at points ; 

 two tubercle-like processes on dorsal surface of neck on level of 

 antenna. 



This is a large Callidina resembling both Uotifer tardus and 

 Philodina macrostyla in general appearance, but intermediate in 

 size and paler in colour than either of these Rotifers. It is 

 very sluggish and torpid in habit, being mostly found in a 

 retracted and seemingly dormant condition in the muddy sedi- 

 ment of the washings of the moss amongst which it lives. It is 

 always thickly encrusted with stones and other foreign matter 

 entangled in the viscous secretion which covers it. The integu- 

 ment of the body is very tough and coriaceous in character, and 

 ma}^ often be found intact, like an empty shell, after the death 

 of the animal and the disappearance of the softer parts. The 

 longitudinal flutings are very marked. The body is less 

 changeable in form than that of B. tardus, and when the 

 animal is moving it retains its somewhat fusiform but de- 

 pressed shape, with alternate prominent swellings and con- 

 tractions. The head, neck, and foot are perfectly transparent 

 and colourless, and it is when the head is slowly protruded 

 that the most distinctive feature of the species becomes 



