CONTENTS. IX 



PAGE 



Eye of the LamellibrancMata No. 3 303 



Fvot of the Unionidm „ 303 



*' Digger" Mollusc and its Parasites „ 303 



Hermaphroditism in, and the Spermatophores of the Nephro- 



pneustous Gasteropoda „ 304 



Mucous Threads of Limax ,, 30+ 



Blood-cells of the Acephala ., No. 4 398 



Later Stages in the Development of Fresh-water Mussels .. „ 309 



Docomotion of the Terrestrial Gasteropoda ,, 399 



Auditory Organs of the Heteropoda ,, 401 



Peculiarity in Littorina ,^ 401 



Structure and Physiology of the Octopus , 402 



Neomenia and tJie other Amphineura „ 404 



Anatomy of Chiton „ 404 



Phenomena which precede the Segmentation of the Ovum in 



Helix aspersa „ 40.j 



Liver and Digestion of the Cephalopodous Mollusca ., ., „ 40.5 



New Facts in the Anatomy of Molluscs No. 5 548 



Generative Organs of the Cephalopoda „ 5 19 



Observations on the Organization of Solenopus „ 5.50 



Organ of Bojan'is in Anodon „ 551 



Chromatophores of the Cephalopoda No. 6 701 



Shells of the Cephalopoda in relation to the Body of their 



Constructor „ 703 



Eye of the Cephalopoda „ 705 



Action of Strychnine on Gasteropodous Molluscs .. ,, „ 705 



Animal of Voluta musica „ 706 



Neomenia (^Solenopus) „ 70G 



Ttfo Collections of Pteropoda „ 706 



Eespiratory Apparatus of Ampullaria „ 706 



Habits of the Octopus No. 7 854 



Segmentation of the Ovum in Helix aspersa „ 854 



Cutaneous Absorption of Helix pomatia „ 856 



Lnfluence of " Cardiac Poisons " on Helix pomatia . . . . „ 857 



Pespiratory Apparatus of Ampullaria ,, 857 



Doridce of the Northern Seas „ 859 



Glaruls in the Foot of the LamellibrancMata „ 859 



Land Shells of Californian and Mexican Ishuuls .. .. ,, 861 



Pompeian Conchology „ 861 



Method of Obtaining Minute Mollusca „ 861 



Segmentation in Worms and Pulmonates „ 877 



Mollusc oida. 



The Relations of Rhabdopleura No. 1 84 



Development of Polyzoa No. 3 300 



Presence of a Segmental Organ in the Endoproct Polyzoa „ 301 



Power of Locomotion in the Tunicata „ 302 



Extension of the coiled Arms in Bhynchonella „ 302 



New Tunicata No. 4 407 



Development of the Salpidce No. 5 551 



Affinities of the Polyzoa „ 553 



