OCTOBER31889. 



Transactions of the Society — 



IX, — Descbiption of a New Species of Megalotrooha. By ^-^^^ 



Surgeon V. Gunson Thorpe, E.N. (Plate XII.) '. 613 



X. — Note on Polarizing Apparatus foe the Microscope. By 



Professor Silvanus P. Thompson, D.Sc. (Pigs. 71-73) .. 617 



STJMMAHY OF CURRENT RESEARCHES. 



ZOOLOGY. 



A. VERTEBRATA :— Embryology, Histology, and General. 



o. Embryolo&y. 



Wallace, A. R. — Darwinism 619 



Thomson, J. A. — Heredity 619 



Curtis, F. — Development of Nail in Human Foefua 620 



Masius, J. — Formation of Placenta of Babbit 621 



Beddabd, F. E. — Structure of Graafian Follicle in Didelphy8 622 



Beard, J. — Early Development of Lepidosteus osseas 622 



NiESsiNG, G. — Spermatogenesis in Mammals 623 



Schwarz, E. — Embryonic Cell-division 624 



p. Histologry. 



Letdig, F. — Structure of Nerve-fibres 621 



FusARi, R. — Peripheral Nervous System of Amphiozus 625 



Platneb, G. — Role of the Accessory Nuclear Body in Secretion 625 



y. General. 

 AlTOHisoN, J. E. T. — Zoology of Afghan Delimitation Commission 626 



MoUusca. 



Tenison-Woods, J. E. — Anatomy and Life-history of Australian MoUusca . . . . 626 

 CxumtRK, J.— Eyes of Mollnsca 626 



y. Gastropoda. 



Semon, R. — Secretion of Sulphuric Acid by Marine Gastropods .. .. 627 



Letelliek, a. — Purple of Purpura lapiUus . . , 627 



Herdmak, W. a., & J. A. Clubb — Nudibranchiaia of Liverpool District .. .. 627 

 Behme, T. — Anatomy and Development of Benal Apparatus of Pulmonale Gastro' 



pods 628 



Mazzabelli, G. F. — Reproductive Organs of Aplysise 628 



Molluscoida. 



o, Ttinicata. 



Seeligeb, O. — Alternation of Generations in Salpse 629 



p. Bryozoa. 



Waters, A. W. — Polyzoa of the Voyage of H.M.S. ' Challenger' 629 



„ „ Bryozoa of New South TTales 620 



Pbouho, H. — Reproduction of Ctenostomatous Bryozoa 629 



Arthxopoda. 



GnA-Ssi, B.-— Ancestors of Myriopods and Insects 630 



a. Insecta. 



Butler, A. G. — Insects supposed to he distasteful to Birds 633 



ScHAFFER, C. — Histology of Insects 633 



Blochmann, F. — Number of Polar Globules in Fertilized and Unfertilized Eggs of 



Bees 634 



Luciani, L., & A. PiUTTi — Respiration of the Ova of Bombyx 635 



Grassi, B. — Termites 635 



OuDEMANs, J. T. — Abdominal Appendages of a Lepismid 636 



Giabd, A. — Galls produced on Typhlocyba rosm by a Hymenopterous Larva .. .. 636 



b 



