*J?i^Sl.JIlne^lff PROGKESS OP MICROSCOPICAL SCIENCE. 369 
their number and arrangement, these cells form clear spaces of various 
configurations, which have by different observers been regarded as the 
trunks and orifices of lymphatic vessels. An analogous explanation 
accounts for the epithelium of these pretended lymphatic vessels. 
The Structure of the British Nemerteans is the title of a paper some 
time since read before the Eoyal Society of Edinburgh. We have not 
seen the memoir itself, but the following abstract appears in the last 
number of the ' Proceedings ' of the Society : — In the first part of the 
paper the anatomy and physiology of the Ommatopleans is described 
from the typical form 0. alba, the variations and peculiarities presented 
by other genera and species being contrasted therewith. The descrip- 
tions are grouped under the following heads : — Dermal Tissues ; Pro- 
boscidean Sheath ; Proboscis ; Digestive, Circulatory, and Nervous 
Systems ; Cephalic Furrows, Pits, and Glands ; Organs of Eeproduction 
and Development. The second part consists of the structure and phy- 
siology of the Borlasians, under the same (or similar) heads, together 
with such anomalous genera as differ from both great groups of 
Nemerteans. The third division treats chiefly of the structure of 
certain (upwards of forty) annelids new to science or to Britain. 
The Goblet-cells of the Epithelium of the Frog's Throat. — Dr. Michael 
Foster, who has been independently carrying on some researches 
upon this subject, recently so much gone into by Herr Boll, has given 
in the May number of the ' Joui'nal of Anatomy and Physiology ' an 
excellent paper on the general character of the epithelium of the 
frog's throat. He gives the following account of the so-called 
*' Becher-zellen — " The most common, perhaps the typical form, is 
that of a globe or of an oval flask with its neck broken off short. The 
lower pole of the globe is occupied by a mass of somewhat refractive 
cell-substance, in the midst of which may with dijficulty be detected 
a shrunken nucleus, often a third less in size than the nucleus of the 
ciliate cells, with an inconspicuous nucleolus. The ordinary cell-sub7 
stance round the nucleus varies somewhat in amount, and also in 
form. Not infrequently, like the corresponding end of the ciliate cell, 
it is continued into delicate branching processes. It is always more 
or less vacuolated The cavity thus occupying at least four- 
fifths of the total area of the cell is crowded with refractive spherules 
of variable size Sometimes these spherules are absent, and 
then the cavity is filled with mucus, and its walls are marked by a 
network of fine lines." 
The Fine Anatomy of the Skin of Lizards has been investigated 
recently by Mr. J. W. Hulke, who has contributed a short paper on 
the subject to the ' Journal of Anatomy ' for May. 
TJie Anatomy and Mode of Division of Stentor. — Those of our 
readers — and they are legion — who are interested in Infusoria should 
read a very excellent paper on this subject by Dr. Moxon, of Guy's 
Hospital. It is published in the journal above mentioned, and 
is a most interesting communication. The author argues strongly 
against the idea that Infusoria require a circulatory system at all. His 
paper is accompanied by various drawings. 
