234 THE MICROSCOPICAL NEWS. 
sent me, along with drawings and description. It is very trans- 
parent ; truncated anteriorly ; cylindrical ; arched dorsally ; deeply 
plicate ventrally; cilia in bundles, moved by many powerful 
muscles (which are well shown if the water is allowed to dry up 
on the glass slip) ; eyes two, red; two short anterior spines; one 
posterior ; jaws, presenting many different appearances, according 
to the position of the animal (some of which are shown in sketches) ; 
eesophageal tube, long and curved; ovary large, in some cases 
dark and segmented; many specimens were seen carrying two 
round eggs, as in Fig. 26a. 
Both Mr. Bolton and myself were at first inclined to consider it as 
Monocerca bicornis, although he had an inkling of the truth, but was 
misled by thinking it had ¢ivee anterior spines. On pointing out 
the slight error into which he had fallen he then became convinced 
that his second supposition was the correct one, and, as on a more 
