210 PROGRESS OF MICROSCOPICAL SCIENCE. [^jTuraaU^^t^Mse^^^ 
His account is partly based on the researches of those who have 
preceded him, and in great part on his own observations. The plates 
accompanying this article are two in nmnber, and are carefully drawn. 
His account of the reproductive system and of the arrangement of the 
muscles is particularly good, especially the latter. He describes very 
minutely the attachment of the various muscles which are employed 
in working the proboscis. The paper should be consulted by those 
Fellows of the Eoyal Microscopical Society who wish to work out 
this subject. — See Zeitschrift filr Wissenschaftliche Zoologic, 19 Band., 
2"" Heft, 1869. 
The Oral Apparatus of Oxyuris. — Herr J. H. L. Flogel publishes a 
brief but good contribution to the anatomy of the mouth of this 
nematoid and its congeners. His illustrations are in some cases 
merely diagrammatic, but in other cases they represent different front 
and profile views of the head. The lips and their peculiar papillse are 
especially the subject of this paper. The author employed immersive 
objectives. — Ibid. 
The Beprodudion ofSiphonophora. — The number of Siebold's journal 
already referred to, and which is rich in histological matter, contains 
also an interesting paper which is hardly microscopic, though nearly 
so. The author, Dr. Alex. Pagenstecher, of Heidelberg, describes a 
new and peculiar mode of reproduction in this coelenterate. 
Histology of the Lower Animals. — Under this title Herr Fritz 
Katzel has commenced, in the last number of the Zeitschrift filr Zoologie, 
the first of a series of papers, which he proposes to make a histo- 
logical account of all the lower animals. The present communication 
deals with the muscular system of annelids ; but is not at all as compre- 
hensive as the memoir published on the muscular tissue of moUusks, 
by Franz Boll, and which appeared in a recent supplement to Schultze's 
Archiv. We notice too that the author does not refer to the labours 
of some English zoologists as he ought to do. This paper is followed 
by a very short one on the muscular system of Nematoides, by Herr 
Anton Schneider. 
Acanthocystis Viridis. — Dr. H. Grenacher makes some observations 
on this species in the same number of Siebold's Zeitschrift above 
referred to. 
Intermediate Forms between Worms and Crustacea. — Some years 
since M. Dujardin called attention in the Annales des Sciences (1851), 
to a small marine form which seemed to connect the Crustacea and 
annelids. This creature Echinoderes has been very minutely described 
and figured in a memoir published by Herr Dr. Eichard Greef, of 
Bonn. The author gives an account of both the general morphology 
and internal anatomy of various species of the genus. The subject 
has an interest in connection with Mr. Darwin's views. — Vide Wieg- 
mann's Archiv fur Naturgeschichte. 1 Heft. 1 Band. 1869. 
The Pollen Grains of Onagracece Gucurbitacecs, and Gorylacece,. — To 
those who desire an easy and interesting subject for microscopic work, 
the paper on the above subject, by Herr C. W. Luerssen, will afford 
