CONTENTS. 
Transactions op the Society — 
PAGE 
XIII, — Remarks on some Progressive Phases of Spirillum 
volutans. Ry R. L. Maddox, M.D., Hon. F.R.M.8., &c. 
(Plate X.) 715 
SUMMARY OF CURRENT RESEARCHES. 
ZOOLOGY. 
A. VERTEBRATA : — Embryology, Histology, and General, 
a, Embryologr - . 
Waldeyeb— Theories of Heredity 720 
Ryder, J. A . — Energy as a Factor in Organic Evolution 720 
„ „ Mechanical Genesis of Form of Fowl's Egg 720 
Seitz — Value of Mimetic Covering in the Struggle for Existence 721 
Davidoff, M. von — “ TJrmund and Spina bifida ” 721 
Platt, J. B . — Ectodermic Origin of the Cartilages of the Head 722 
Keibel, F. — Development of Nose and Upper Lip 722 
Moore, J. E. S . — Mammalian Spermatogenesis 722 
Pjatnizky, J. J . — Human Tails 722 
Duval, M . — Placenta of Carnivora 723 
Keibel, F . — Development of Bladder and Allantois in Guinea-pig 723 
Rose, C . — Development of Teeth in Chamseleon 723 
Saint-Remy, G . — Development of Pancreas in Ophidians 724 
Bambeke, C. Van — Gastrular Raphe of Triton alpestris 724 
Barfurth — Regeneration of Germinal Layers in Amphibia 724 
Nusbaum, J . — Development of Hepatic Vessels and Blood-corpuscles in Anura .. 725 
Nickerson, W. S . — Development of Scales of Lepidosteus 725 
McClure, C. F. W . — Segmentation in Petromyzon marinus 725 
Valenti, G . — Development of Nervous Tissue 725 
0. Histology. 
Stricht, O. Van der — White Corpuscles of Mammals 725 
y. General, 
Weber, M . — Hairs and Scales in Mammals 726 
Hyatt, A. — Bioplastology 727 
B. INVERTEBRATA. 
Mollusca. 
Loisel, G . — Lingual Cartilages of Mollusca 728 
D’Hardiviller, A. — Nervous System of Lamellibranchs and Gastropods .. .. 728 
o. Cephalopoda. 
Joubtn, L . — Peculiar Chromatophores in a Cephalopod 729 
Lonnberg, E . — Swedish Cephalopoda 729 
y. Gastropoda, 
Dall, W. H . — Phylogeny of Docoglossa 729 
Sterki, V. — Vallonia ,. .. 729 
Davenport, C. B.-— Development of Cerata in JEolis 730 
5. Iiamellibranchiata. 
Kellogg, J. L. — Morphology of Lamellibranchiata 730 
CoupiN, H . — Elimination of Foreign Bodies in Lamellibranchs 731 
