541 
On one side of the posterior end, in many individuals, is a more or less 
well developed point (fig. 10) similar to that seen in some individuals 
of O. caudata (fig. 6) or O. obtrigona, or to the larger protuberance some- 
times observed beside the posterior end in O. xelleri (fig. 8). It is directly 
at the base of this protuberance, when present, that the pore of the 
excretory vacuole opens to discharge its granular and liquid contents. 
Parts of the vacuole itself have been observed in a number of individuals 
(figs. 10 and 11) and in many more the sticky discharged contents have 
been seen attached to the posterior cilia and trailing behind as the ani- 
mal swims (fig. 10). 
The number of rows of cilia in this, as in all Opalinas varies with 
the size of the individuals. They are accurately drawn in fig. 4, which 
shows them forty-eight in number at the anterior end. In eight cases 
the branching of lines of cilia is shown. In other individuals, of course, 
the number of lines of cilia would be different. 
Dimensions of large individual: Length of body, measured from a 
to d (fig. 4), 0,2 mm.: width of body, measured at right angles to this 
line at the widest place, 0,114 mm.: diameter of resting nuclei in full 
sized individuals, 0,0243 mm. The flattened form of the body is shown 
_ in the section, fig. 3, in which the diameter of the nuclei is seen to prac- 
tically equal the thickeness of the endosarc, the dotted line in this figure 
indicating the boundary between endosarc and ectosarc. 
The nuclei are more nearly central than in most binucleated forms. 
In early stages of mitosis the long axes of the nuclei lie nearly transverse 
to the lines of cilia. Later they come to lie more nearly parallel to them. 
The character of the chromosomes in this species is shown in the accom- 
panying paper upon Chromosomes in Opalina. 
In the specimens of Bufo agua I have had for study Opalina antil- 
liensis has been the only Opalina present. 
3. Zur Kenntnis der Harpacticidengattung Epactophanes Mrazek. 
Von Erich Ke ler, Leipzig. 
(Mit 6 Figuren.) 
eingeg. 14. April 1914. 
Ehe ich auf meine eignen Untersuchungen, die Gattung Epacto- 
phanes betreffend, eingehe, möchte ich kurz auf einige Tatsachen, die 
Menzel (4) in seiner Arbeit in dieser Zeitschrift (Bd. XLIII, Nr. 13 
vom 17. März 1914) festgestellt hat, hinweisen. 
Menzel versucht an der Hand der Beschreibung von Moraria 
muscicola zu zeigen, daß wir es bei diesem von Richters (7) 1900 be- 
schriebenen Harpacticiden, »auch was die allgemeine Körpergestalt an- 
belangt, mit einem typischen Vertreter der Gattung Moraria Scott (= 
