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BIBLIOGRAPHY. 
The first part of Professor Eanvier’s ‘ Traite technique d’His- 
tologie ’ has been issued. An English translation is in preparation. 
The Annals and Magazine of Natural History for May : — 
Notes on the Genus Ketepora, with Descriptions of New Species. By the Rev. 
Thomas Hincks, B.A., F.R.S. (With 2 plates.) 
Einendatory Description of Purisiphonia Clarkei, Bk., a Hexactinellid Fossil 
Sponge from N.W. Australia. By H. J. Carter, F.R.S., &c. 
On Calcareous Hexactinellid Structure in the Devonian Limestone; large 
Fossil Hydrozoic Coralla from the Chalk; and further Observations on the 
Replacement of Silex by Calcite. By H. J. Carter, F.R.S., &c. 
Minor notes ; — 
On Selaginopsis, Polyserias, and Pericladium. By M. C. Mereschkowsky. 
And on the Rhizopoda of the Salt Lake of Szamosfalva. By Dr. Geta Entz. 
For June : — 
On the Reticularian and Radiolarian Rhizopoda (Foraminifera and Poly- 
cvstina) of the North Polar Expedition of 1875-76. By Henry B. Brady, F.R.S. 
(With 2 plates.) 
Hardwicke’s Science-Gossip for May : — 
What a Diatom is (translated from the paper by M. Julien Deby, in the 
Bulletin of the Belgian Microscopical Society). (With 5 woodcuts.) — A Wet 
Method of Preparing Objects for Microscopical Mounting. By Mr. A. W. Stokes. 
— A New (Oil) Immersion Object-glass. — Marine Amoeba. — Kent’s ‘ New Field 
for the Microscope.’ — Fossil Diatomaceae, &c. — Diatomaceous Deposits near 
Richmond. — Mr. Thomas Bolton’s Living Microscopic Organisms. — Professor J. 
E. Smith’s Apology for Diatomaniacs. 
For June : — 
What a Diatom is (continued). (With 3 woodcuts.) — A Glass-Eating Lichen. 
By H. T. Johnston -Lavis. (With 4 woodcuts.) — On Preparing and Mounting 
Leaves and other parts of Plants to show the Crystals in situ. By W. H. 
Hammond. — “ Cutting it fine ” (33 sections of the head of one cockroach, made 
by Mr. E. T. Newton). — Fossil Diatomaceae. — Aquaria for Microscopic Work. — 
Small Aquarium for Microscopic Objects. — Canada Balsam in India. — The 
Hackney Microscopical Society. — Fossil Fresh-water Sponges (in the so-called 
“ Flints ” found in the Purbeck Limestones). — Removing Surplus Balsam. 
Grevillea for March : — 
Reproduction of the Ascomycetes (conclusion). By Dr. Maxime Cornu. 
For June : — 
British Bog-Mosses. (Rev. J. C. Vize’s Microscopical preparations of Dr. 
Braithwaite’s series of Sphiujnum specimens.) 
The Salmon Disease (Saprolegnia ferax). (With 3 woodcuts.) 
Nature for May 16 : — 
The New “Oil Immersion” Object-glass, constructed by Carl Zeiss, of Jena. 
By Rev. W. H. Dallinger, F.R.M.S. 
For May 23 : — 
The Life-History of a Septic Organism. Abstract of paper read before the 
Royal Society by the Rev. W. H. Dallinger, F.R.M.S. 
The Proceedings of the Royal Society for January and February 
(No. 185):— 
Observations on the Nervous System of Aurelia aurita. By E. A. Schafer. 
The Cortical Lamination of the Motor Area of the Brain. By Bevan Lewis, 
F. R.M.S., and Henry Clarke, L.R.C.P. (With 3 plates.) 
Further Researches on the Minute Structure of the Thyroid Gland. Pre- 
liminary Communication. By E. Cresswell Baber, M.B. London. 
On Schulze’s Mode of Intercepting the Germinal Matter ol the Air. By John 
Tyndall, F.R.S. 
