CONTENTS, 
Transactions op the Society — pack 
I. — Freshwater Algae and Schizophyceae of Hampshire and Devon- 
shire. By Alfred W, Bennett, M.A., B.Sc., F.L.S., F.R.M.S., 
Lecturer on Botany at St. Thomas’s Hospital. (Plate I.) .. Parti 1 
II. — On an Objective with an Aperture of 1*60 N.A. (Mono- 
bromide of Naphthaline Immersion) made according to the 
Formulae of Prof. Abbe in the Optical Factory of Carl Zeiss. 
By Dr. S. Czapski (Jena) „ 11 
HI. — The President’s Address on some Needless Difficulties in the 
Study of Natural History. By 0. T. Hudson, LL.D., F.R.S. Part 2 129 
IV. — On the Variations of the Female Reproductive Organs, espe- 
cially the Vestibule, in different species of Uropoda. By 
Albert D. Michael, F.L.S.,F.Z S.,F.R.M.S.,&c. (Plate IV.) „ 142 
V. — Contribution to the Freshwater Algae of North Wales. By 
Wm. West, F.L.S., Lecturer on Botany and Materia Medica 
at the Bradford Technical College. (Plates V. and VI.) .. Part 3 277 
VI. — On some Methods of preparing Diatoms so as to exhibit clearly 
the nature of their Markings. By 0. Haughton Gill, F.C.S., 
F.R.M.S. (Plate VII.) Part 4 425 
VII. — On a Simple Form of Heliostat, and its Application to Photo- 
micrography. By Thomas Comber, F.L.S. (Figs. 48-50) .. „ 429 
VIII. — The Foraminifera of the Red Chalk of Yorkshire, Norfolk, and 
Lincolnshire. By H. W. Burrows, C. Davies Sherborn, 
and the Rev. Geo. Bailey. (Plates VIII.-XI.) Part 5 549 
IX. — Note on a New Type of Foraminifera of the Family Chilo- 
stomellidse. (Fig. 60.) By Henry B. Brady, LL.D., F.R.S. „ 567 
X. — The Tube-building Habits of Terebella littoralis. By Arnold 
T. Watson. (Plate XIV.) Part 6 685 
Summary of Current Researches relating to Zoology and Botany (princi- 
pally Invertebrata and Cryptogamia), Microscopy, &c., including Original 
Communications prom Fellows and Others.* 15, 153, 307, 435, 572, 690 
ZOOLOGY. 
A. — Vertebrata : — Embryology, Histology, and General. 
a. Embryology. 
PouLTON, E. Theories of Heredity 
Vries, PI. de — Intracellular Pangenesis 
Rabl, C. — Theory of the Mesoderm 
Duval, M. — Placenta of Eodentia 
Parker, T. Jeffery — Nomenclature of Sexual Organs in Plants and 
Animals 
Part 1 
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* In order to make the classification complete, (1) the papers printed in the 
‘ Transactions,’ (2) the abstracts of the ‘ Bibliography,’ and (3) the notes printed in 
the ‘Proceedings’ are included here. 
