CONTENTS. 
Teansaotions of the Society — PA0B 
X.— The Tube-building Habits of Terebella littoralis. By 
Arnold T. Watson. (Plate XIY.) 685 
SUMMARY OF CURRENT RESEARCHES. 
ZOOLOGY. 
A. VERTEBRATA : — Embryology, Histology, and General. 
a. Embryology. 
PAGK 
Guliok, J. T . — Intensive Segregation 690 
Lataste, F . — Definition of Species 691 
Hertwig, O . — Comparison of Oogenesis and Spermatogenesis 691 
Meyer, H . — Development of the Primitive Kidney in Man 692 
Minot, C. S . — Theory of the Placenta 693 
Biehringer, T . — Inversion of the Germinal Layers in Rodents 693 
Mayo, F . — Development of Superior Incisors and Canines of Sheep 693 
Erlanger, It. von — Blastopore of Anurous Amphibia 693 
Marshall, A. Milnes, & E. J. Bles — Development of Kidneys in Fat-Bodies in 
the Frog 694 
,, „ „ Development of Blood-vessels of Frog .. .. 694 
Kastschenko, N . — Process of Maturation in Ova of Selachians 695 
Ftjsari, R . — Development of Teleostean Fishes 695 
Kupffer, C . — Development of the Lamprey 696 
0. Histology. 
Leydig, F. — Intra - and Inter-cellular Ducts 697 
Boveri, T. — Cell-Studies 697 
Leclercq, Emma — Accessory Corpuscle of Cells 699 
Howell, W. H .— Red Blood-corpuscles 700 
„ „ Giant-Cells of Marrow 700 
y. General. 
Dubois, R . — Production of Light by Animals and Plants 701 
Gaskell, W. H. — Origin of Vetebrates from a Crustacean-like Ancestor 701 
Patten, W . — Origin of Vertebrates from Arachnids 702 
Woodward, A. Smith — New Theory of Pterichthys 701 
Bateson, W . — Abnormal Repetition of Parts in Animals 704 
B. INVERTEBRATA. 
M‘Coy — Zoology of Victoria 704 
Ridley, H. N . — Zoology of Fernando Noronha 704 
Ambronn, H. — Cellulose-reaction in Arthropoda and Mollusca 704 
Mollusca. 
y. Gastropoda. 
Norman, A. M . — Revision of British Mollusca 704 
Haller, B . — Cyprsea testudinaria 704 
Mazzarelli, G. F. — Swammerdam's Vesicle in Aplysia 705 
5. Liamellibrancbiata. 
Rawitz, B . — The Margin of the Mantle 705 
