CONTENTS. 
; . ^ , 
Tjiansactions of the Society — pagk 
L — Fheshwater Alg^ and Schizophyce^ of Hampshire and 
Devonshire. By Alfred W. Bennett, M.A., B.Sc., F.L.S., 
F.E.M.S., Lecturer on Botany at St. Thomas’s Hospital. 
(Plate T.) 1 
II. — On an Objective with an Aperture of 1*60 N.A. (Mono- 
bromide OF Naphthaline Immersion) made accobding to 
THE Formula of Prof. Abbe in the Optical Factory 
of Carl Zeiss. By Dr. S. Czapski (Jena) .. .. - .. .. 11 
SUMMARY OF CURRENT RESEARCHES. 
ZOOLOGY. 
A. VERTEBRATA : — Embryology, Histology, and General, 
a. Embryology. 
PoULTON, E. B . — Theories of Heredity 15 
Vries, H. de — Intracellular Panyenesis 1.5 
Rabl, C . — Theory of the Mesoderm 16 
Duval, M . — Placenta of Rodentia 18 
Parker, T. Jeffery — No it , end afore of Sexual Organs in Plants and Animals .. 19 
Gunther, A. — Pgg-capsul'e of Chimsera monstrosa 19 
y. General. 
Carus, J. V . — Index to the ^ Zoologischer Anzeiger’ 19 
Anderson, John — Zoology of Mergui Archipelago 20 
B. INVERTEBRATA. 
Friedlaender, B . — Medullated Nerve-Fibres and Neurochord in Crustacea and 
Annelids 20 
Mollusca. 
Chun, C . — Mollusca of Canary Islands 21 
Tate, R . — Census of the Molluscan Fauna of Australia 21 
y. Gastropoda. 
SiMROTH, H . — Some Species of Vaginula 21 
Hansen, G. A. — Neomenia, Proneomenia, and Chsetoderma 22 
5. Lamellibranchiata. 
Johnston, R. M , — Variability of Tasmanian Unio 23 
Molluscoida. 
a. Tunicata. 
Seeliger, O . — Development of Pyrosoma 23 
Fiedler, K . — Heterotrema Sarasinorum 25 
Arthropoda. 
Dewitz, H . — Peculiar Swimming Movements of Blood-corpuscles of Arthropods ., 25 
Sharp, D. — Vision of Arthropods 25 
a. Insecta. 
Poulton, E. B . — Distasteful Insects 26 
Haase, E . — Abdominal Appendages of Insects 26 
WiELOWiEjSKi, H. V . — Luminous Organ of Insects 28 
Emery, C . — Development of Insects 28 
Jackson, W. B. atcbett— M orphology of Lepidoptera 29 
