ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 
189 
nucleoli are large, show a honeycomb structure, and subsequently break 
up into granules. The two nuclei become closely apposed, and the 
sperm-centrosomes take up their position in relation to the segmentation 
spindle. The framework of both nuclei is modified into threads, the 
membranes disappear, and the spindle-fibres are formed. 
In pathological cases maturation and fertilisation may occur within 
the mother animal ; then the cleavage is abnormal, and several ova may 
coalesce in a complex. 
Nemathelminthes. 
Strongylus retortseformis in Hares. * * * § — Prof. E. Yung describes an 
epidemic of pneumonia among Bohemian hares in a preserve (Haute- 
Savoie). The animals were very thin, but normal, except as regards 
the lungs. Trachea and bronchi were choked by legions of Strongylus 
retortseformis Zeder. Yon Linstow notes Sir. commutatus in the hare’s 
lungs, while Str. retortseformis has been previously recorded as ex- 
clusively intestinal, Yung found about 30,000 in a single lung. 
Filaria loa in the Human Eye.f — Plerren H. Ludwig and Th. Sae- 
misch describe a case of Filaria loa Guyot, which in August 1895 showed 
itself beneath the conjunctiva of an African traveller, whose last sojourn 
in Africa was in 1891. Ludwig gives a description of the worm, and 
notes two other cases recently reported by Robertson % and by Hirscli- 
berg.§ 
Filaria labiata.il — Dr. M. Condorelli Francaviglia gives a full de- 
scription of the anatomy and minute structure of Filaria labiata Creplin, 
parasitic in Ciconia nigra , and probably also in C. alba . It is a very 
large form, the female measuring 60 cm. in length, the male 8’5- 
8*9 cm. The colour of the body is whitish yellow, but the undulating- 
intestine is seen as a cinnabar-red tube through the skin. We cannot, 
however, enter into the details of the paper. 
Plathelminth.es. 
New Nemerteans.^F — Dr. O. Burger describes the following new 
species: — Carinoma patagonica, Amphiporus bicolor , A. michaelseni, Eu- 
polia maculosa. E. lineolata , E. antillensis, Micrura (Linens?') glandulosa, 
Cerebratulus barentsi, C. magelhaensicus ; he has also some notes on 
geographical distribution. 
The Genus Thysanozoon.** — Dr. R. Ritter von Stummer-Traunfels 
discusses the characteristics of this genus, and gives an account of the 
species. The genus belongs to the Pseudoceridae ; there are pointed 
car-like marginal tentacles ; there are villous dorsal appendages into 
which blind diverticula of the gut are sometimes continued ; the male 
copulatory apparatus is single or double. In none of the forms examined 
were diverticula of the gut continued into the dorsal outgrowths, as in 
* Comptes Rer.dus, cxxii. (1896) pp. 413-4. 
t Zeitschr. f. wiss. Zool., lx. (1895) pp. 726-40 (1 pi.). 
X Brit. Med. Journ., Oct. 1S94, pp. 920-1. 
§ Berlin Klin. WocheDschr., Nov. 1895, pp. 956-8. 
|| Boll. Soo. Rom. Stud. Zool., iv. (1895) pp. 98-108, 248-64 (1 pi.). 
Zeitschr. f. wiss. Zool., lxi. (1895) pp. 16-37 (2 pis.). 
** Op. cit., lx. (1895) pp. 689-725 (3 pis.). 
