272 PROGRESS OF MICROSCOPICAL SCIENCE. [SSal Sv?!?!^ ' 
The Development of Insects. — In the preceding valuable journal will 
also be found an excellent paper, by Herr Ganin, on the development- 
history of Insecta. The author deals principally with Platygaster, 
Polynema, Teleas, and Ophioneurus, and gives about seventy exquisite 
illustrations in three large folding plates. 
Tactile Corpuscles in the Parroquefs Bealc. — Dr. E. Gougon has a 
curious paper on this subject in the Journal de VAnatomie for October. 
He gives a section of the beak, showing what he regards as groups of 
Pacinian corpuscles, and he gives some figures of these bodies sepa- 
rately examined, which seem to bear out his assertion of the existence 
of these corpuscles. The author admits that there are difficulties in the 
way of accepting this view, but he thinks that the fact that the parro- 
quet uses its beak as a tactile organ is sufficient to obviate them. 
Our Knoidedge of the Betina. — Professor Krause, of Gottingen, 
gives a sort of critique of the work done on the retina from the year 
1856 to 1868, in the above number of the Journal de VAnatomie. It 
will be found a valuable retrospect for those engaged in the histology 
of the eye. It was begun in the previous number, and will be 
continued in the next. It analyzes the views of the author, of 
Schultze, Hulke, Zenker, Valentin, Babuchin, Steinlin, Miiller, Henle, 
and others. 
The Latex-fluid of the Mulberry. — Great difference of opinion 
exists as to the nature and uses of this curious fluid, and of the system 
of vessels by which it is conveyed. In a paper published in the 
Annates des Sciences [t. x.], M. E. Faivre discusses the opinions of 
Schultze, Trecul, Naudin, Von Mohl, and others, and concludes by 
regarding the latex as a nutritive fluid, an elaborated sap, conveying 
materials for growth. It may contain other matters also, but it is 
not on that account to be regarded as excrementitious. 
A Sea-deposit destitute of Foraminifera. — Mr. Charles Bailey, who 
has been examining the foraminifera sands of Connemara, recently drew 
attention to the fact, that while examining some sands in Dog's Bay, 
Connemara, he found a deposit in a small creek on the southern 
shore of the bay, which, from its being sheltered by rocky sides, he 
felt sure would yield foraminifera. On a minute examination, how- 
ever, of the materials composing its beach, there was a singular 
absence of foraminifera, scarcely a single example of these creatures 
being discoverable. The beach was uniform in character from low- 
water to high-water mark, and was for the most part made up of 
fragments of molluscous shells mixed with coarse grains of sand. 
This deposit is the more remarkable from the contrast it presents to 
the rest of the beaches in the neighbourhood, those of Dog's Bay and 
Gorteen Bay being made up of considerably finer materials and 
abounding in foraminifera; further, the most perfect specimens of 
foraminifera are found round the next headland, not many yards from 
the creek in question. — See 'Proceedings of Lit. and Phil. Soc. of 
Manchester,' issued in October. 
Th'e Microscopical Examination of the Dog-woods. — In ' The Student ' 
for October, Mr. J. R. Jackson, in a paper on the dog- woods used for 
