ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 
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mata appendiculata , Eospliora viridis (= E. anrita witli two red specks 
close to the frontal eyes), Mastigocerca grandis (? = M. elongata ), M. 
unidens , and M. cuspidata (probably both = M. scipio ), M. rosea (= M. 
bicornis ), Coelopus intermedins , Dinocharis similis, Cathypna flexilis , 
C. hrachydactyla , C. magna, Distyla oxycauda (= Diplax ornata, Daday 
= D. ludwigii ), Monostyla bicornis , Metopedia quadricarinata , M. dacty- 
liseta, M. sulcata , Pterodina emarginula (= (?) Pt. reflexa ). Young 
students of the Rotifera might as well make themselves fully ac- 
quainted with the known species before burdening science with so many 
synonyms. 
Some little-known Pterodinge.* — In this paper Mr. C. F. Rousselet 
fully describes and illustrates the following four species of Pterodina 
which before were scarcely sufficiently defined : — Pt. reflexa , Pt. elliptica, 
Pt. clypeata , Pt. cseca, giving also copies of figures of the following 
species which are not readily accessible : — Pt. bidentata , Pt. parva , Pt. 
incisa, Pt. trilobata, and Pt. intermedia. The male of Pt. elliptica is 
figured and described for the first time. 
Development of Asplanchna.j — Dr. Al. Mrazek has studied the 
development in this genus, especially in A. Herrichi. There are, as 
usual, three kinds of eggs, — parthenogenetic ova which become males, 
parthenogenetic ova which become females, and fertilised eggs which 
become females ( Dauereier ). The author discusses the oogenesis, the 
structure of the ova, the early stages of maturation and fertilisation, and 
the question of the layers. 
Nematohelminth.es. 
New Nematodes from Bismarck Archipelago, t — Dr. von Linstow 
describes a collection made by Prof. F. Dahl. It includes some new 
forms of Ascaris, Filar ia, &c., and a remarkable form, Cloacina Dahli 
g. et sp. n., from Macropus Browni. As the author remarks, Australia 
has often proved itself a land of surprises to the zoologist, and Cloacina 
is in its own way surprising. It is one of the Secernentes, with lateral 
areas so strongly developed that they are sometimes apposed in the 
middle. There is an excretory pore ; the skin is very peculiar ; the 
musculature is monomyarian ; the female opening is confluent with the 
anus, forming a “ female cloaca ” — a unique character. The genus 
belongs to Molin’s Acrophalli and to the Strongylidse. 
Excretion in Ascaris. § — Herr S. Metalnikoff has independently 
reached results similar to those of Nassonow. He injected ammoniacal 
carmine &c. mixed with perivisceral fluid into living specimens of 
Ascaris megalocephala, and found that particles occur in the walls of 
-the lateral canals and adjacent tissue, and that they are taken up by 
the four large anterior “ excretory cells.” The actual ingestion is due 
to the numerous small “ vesicles ” on the outgrowths of the four giant- 
cells. 
* Journ. Quekett Micr. Club, vii. (1898) pp. 24-30 (3 pis.). 
t SB. Bohm. Ges. Wiss., 1897 (ii.) No. lviii. 11 pp. (1 fig.). 
X Arch. Naturgesch., lxiii. (1897) pp. 281-91 (2 pis.). 
§ Bull. Acad. Sci. St. Petersbourg, vii. (1897) pp. 419-26 (figs.) (Russian). See 
Zool. Centralbl., v. (1898) pp. 325-6. 
1898 2 g 
