CONTENTS. 
Transactions op the Society— pagb 
VII. — On the Structure op certain Diatom-valves as shown 
by sections of charged specimens. By C. Haughton 
Gill, F.C.S., F.R.M.S. (Plate VIII.) 441 
VIII. — A New Illuminating Apparatus. By E. M. Nelson, 
F.R.M.S. (Figs. 51 and 52) 443 
SUMMARY OF CURRENT RESEARCHES. 
ZOOLOGY. 
A. VERTEBRATA : — Embryology, Histology, and General, 
a. Embryolog-y- 
Fol, M.H. — Fecundation 447 
Klebs, E. — Comparative Anatomy of Placenta 448 
Henricius, G. — Placenta of the Cat 448 
Wenckebach, K. F. — Gastrulation in Lacerta agilis 449 
Mitsukuri, K . — Foetal Membranes in Chelonia 449 
Waters, B. H. — Primitive Segmentation of Vertebrate Brain 449 
/?. Histology. 
Schafer, E. A. — Structure of Amoeboid Protoplasm 450 
Macallum, A. B. — Morphology and Physiology of the Cell 450 
Goppert, E. — Indirect Fragmentation 451 
Muller, H. F. — History of Blood-corpuscles 451 
Lwoff, B . — Origin of the Fibrillse in Connective Tissue .. 451 
y. General. 
Parker, T. Jeffery — Elementary Biology 451 
Schimkewitsch, W . — Classification of Animal Kingdom 452 
B. IN VERTEBRATA. 
Korotneff, A. — Zoological Paradoxes 453 
Hebdman, W. A. — Biological Results of Cruise of the ‘ Argo * 454 
Mollusca. 
Pteropoda. 
Knipowitsch, N . — Development of Clione limacina 454 
y. Gastropoda. 
Conkton, E. G. — Embryology of Crepidula and Urosalpinx 454 
Willem, V. — Eyes of Pulmonata Basommatophora 455 
5. Lamellibrancliiata. 
Latter, O. H. — Anodon and TJnio 455 
Molluscoida. 
a. Tunicata. 
Herdman, W. A. — Ecteinascidia and other Clavelinidse 456 
Garstang, W. — Tunicata of Plymouth 456 
j8. Bryozoa. 
Davenport, C. B . — Budding in Bryozoa 456 
Harmer, S. F . — Regeneration of Lost Parts in Bryozoa 457 
„ „ Origin of Embryos in Ovicells of Cyclostomatous Polyzoa .. .. 457 
Oka, A. — Freshwater Polyzoa 457 
Arthropoda. 
Jaworowski, A. — Extremities of Embryo of Arachnids and Insects 
458 
