CONTENTS. 



Transactions op the Sooiett — ,a«b 



VIII. — Twelve New Species of Eotifera. By P. H. Gosse, F.R.S., 



Hob. r.R.M.S., &c. (Plate VIII.) 3&1 



SUMMARY OF CURRENT RESEARCHES. 

 ZOOLOGY. 

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

 a. Embryology. 



Roux, W. — Mechanism of Development 3G8 



Haddon, A. 0. — Origin of Segmental Duct .. .. ,. 369 



Denikeb, J. — Emhryogeny of Anthropoid Apes 870 



Dewitz, T. — Segmentaiion of Frog Ova in Sublimate Solution 370 



BoEN, G. — Hyhridization between Amphibia 370 



List, J. H. — Origin of Periblast in Teleosteans 371 



Dabkste, C. — Formation of Double Monsters .. .. 372 



j9. Histology. 



KossEL, A. — Chemistry of CeU-nticleus 372 



'RovQEX, C— Death of Muscles 372 



B. INVERTEBRATA. 



Babbois, J. — Singular Parasite on Firola 373 



FoBEL, H. — Pelagic Micro-organisms of Fresh-water Lakes 373 



Imhof, O. 'E.— Microscopic Fauna of High Alpine Lakes 374 



MoUusca. 



Gro-wtk of the Molluscan Shell .. .. 374 



BouviEB, E. K — Nervous System in Tenioglossate Prosobranch 374 



Habvey Gibson, R. J. — Anatomy of Patella vulgata 375 



Gaenault, p. — Concretionary Gland of Cyclostoma elegans 376 



Osbobn, H. L. — Osphradium of Crepidula 376 



BiNNEY, W. G. — Terrestrial Air-breathing Molluscs of the United States 376 



Molluscoida. 

 o. Tunicata. 



Lahille, F. — Colonial Vascular System of Tunicata 377 



Heedman, W. A. — New Organ of Respiration in Tunicata 377 



„ „ ^ Challenger^ Tunicata .. 377 



/B. Folyzoa. 



HiNCKB, T. — Critical Notes on Folyzoa 377 



Busk, G.— ' CAoZZewger ' Polyzoa 378 



Hey to the Fresh-water Polyxoa 378 



Keinhaed, W. — Fresh-toater Bryozoa 378 



Arthropoda. 



Lankestee, E. Ray — Classificaiion of the Arthropoda 378 



Schneider, A. — Digestive Tract of Arthropoda, and particularly of Insects .. .. 378 



ViALLANES, H. — Comparative Morphology of the Brain in Insects and Crustacea .. 379 



a. Insecta. 



FoREL, A. — Vision of Insects 379 



Gbabeb, V. — Function of Antennx 380 



Haasb, E. — Holopneusty in Beetles 880 



Meinert, F. — Labium of the Coleopterous genus Stenus 380 



Choloukovsky, N. — Prothoracic Appendages of Leyndoptera 381 



„ „ Morphology of Malpighian Tubes in Lapidoptera 381 



