CONTENTS. IX 



PAGE 



Development of some Metazoa Part 6 763 



Symbiosis of Dissimilar Organisms ,, 764 



Pelagic Fauna of Fresh-water Lakes „ 765 



Mollusca. 



Digestion of Amyloids in Cephalopoda Part 1 30 



Proneomenia sluiteri „ 31 



Maturation, Fecundation and Segmentation of Limax cum- 



pestris Part 2 178 



Kidney of Chiton „ 179 



Morphology of Neomenia .. .. ,, 180 



Development of the Cephalopoda Part 3 328 



Development of the Oyster „ 330 



Abortion of Reproductive Organs of Vitrina „ 330 



Morphology of the Amphineura „ 331 



Anatomy and Classification of the Cephalopoda . . . . Part 4 485 



Ink-Sac of Cephalopoda . . . . „ 487 



Sense of Colour in Cephalopoda „ 489 



" Foot " of certain Terrestrial Gastropoda „ 489 



Mucin of Helix pomatia „ 490 



Bhodope veranii „ 491 



Nervous System of Mollusca Part 5 603 



North-American Cephalopoda ,, 604 



Marginella and the Pseudomarginellida . . ,, 604 



Vascular System of Naiades and Mytilidae ,, 605 



Sexuality of the Oyster „ 606 



Curious Secretion in Gasteropods Part 6 766 



Olfactory Organ of Parmacella „ 767 



Innervation of the Mantle of Lamellibranchs „ 767 



Differentiation of Protoplasm in Nerve-fibres of Unionidce „ 767 



MoUuscoida, 



Development of Salpa Part 1 82 



Tunicata of the ' Challenger ' „ 33 



Organization and Development of the Ascidians Part 2 180 



' Challenger' Ascidians {Culeolus) „ 182 



Embryonic Membranes of the SalpidcB ,, 182 



Modifications of the Avicularia in Bryozoa „ 183 



New Synascidian Part 3 331 



Alternation of Generations in Doliolum „ 331 



Test-Cells in Ascidian Ova Parti 491 



Embryology of the Bryozoa „ 492 



New Adriatic Bryozoa ,, 494 



Disdaplia Part 6 768 



Natural History of Doliolum „ 768 



Development of Ganglion and Ciliated Sac in Pyrosoma . . „ 769 



Development of Genital Products of Cheilostomatous Bryozoa „ 769 



Arthropoda. 



Brain of Crustacea and Insects Part 6 770 



