208 SUMMARY OF CURRENT RESEARCHES RELATING TO 
Rotatoria from East Africa.* * * § — Dr. Anton Collin gives an account 
of some Rotifers observed in East Africa by Dr. Stuhlmann during bis 
journey with Emin Pasha. The account is based on short notes and 
drawings, and a very few specimens preserved in spirit, and is therefore 
very fragmentary, and in many cases the animals cannot be identified. 
Sixteen species are enumerated, four of which are considered to be new : 
— Philodina (?) emini , Euchlanis longicaudaia, Bracliionus tetracanthus,. 
and Noteus Stuhlmanni. 
Rotatoria of the Neighbourhood of Kharkow. - ]* — In this pretentious 
memoir, entirely in the Russian language, Mr. A. S. Scorikow enume- 
rates and describes 140 Rotifers found in his neighbourhood, of which 
the following six are considered new species and varieties: — Polyarthra 
platyptera var. remata , Triarthra iliranites , Pleurotrocha sigmoidea, 
Battulus bicornis, Brachionus cluniorbicularis, and BracMonus lineatus. 
The claim to specific rank appears very slight with most of these, and 
B. lineatus is certainly identical with Hempel’s B. punctatus mentioned 
above. 
Nematohelminthes. 
Life-History of Trichina.J — Herr Geisse finds, by means of feeding- 
experiments, that the impregnated females bring forth their embryos in 
the- tubular glands of the small intestine, and that the embryos pass 
into the body more by the vascular system than by active migration. 
Herren R. Hertwig and Graham § find that embryos reach the intra- 
muscular connective tissue eight days after infection. When the 
Trichina enters the muscle-fibre, the striping disappears, and the nuclei 
multiply and grow. The worm is surrounded by a gelatinous modifica- 
tion of the sarcolemma, proliferating connective tissue, and leucocytes. 
As the capsule is formed the muscle-fibre disappears at that place. 
Filaroides in Frontal Sinuses of Skunks.|| — Mr. W. McM. Wood- 
worth calls attention to the occurrence in America of Filaroides muste - 
larum van Ben., which is common in martens and weasels in Europe. 
It causes swellings of the frontal bones of skunks, and probably in other 
Mustelidre. 
Platyhelminthes. 
Fragmentation in Lineus gesserensis.f — Dr. A.*:Brown finds that 
the zones of fission in Lineus gesserensis coincide with the transverse 
markings ; that the fission is a process of digestive solution (by the 
fluids of the gut), and proceeds from within outwards ; that there are- 
circular outgrowths of intestinal epithelium corresponding to external 
grooves; that, as the result of opposing pressures outwards and inwards, 
atrophy, disintegration, and disappearance of the outermost cells of the 
intestinal outgrowth take place, bringing the body-wall into contact 
with the digestive cavity ; that the ruptured surfaces are at once covered. 
up by the intestinal outgrowth, and by proliferation of the subjacent 
* ‘ Rotatorien, Gastrotrichen und Enlozoen Ost-Afrikas, von Ant. Collin,’ 14 figs. 
t ‘ Rotatoria of the Neighbourhood of Klmrkow,’ 1896, 168 pp., 3 pis. (in Russian). 
% Miinchener med. Wochenschr., xlii. (1895) p. 655. Zool. Centralbl., iv. (1897)> 
pp. 96-7. 
§ Miinchener med. Wochenschr., xlii. (1895) pp. 504-5 (4 figs.). Zool. Centralbl., 
iv. (1897) p. 97. || Amer. Nat., xxxi. (1897) pp. 231-5. 
T Proc. Roy. See., Ixi. (1897) pp. 28-9. 
