CONTENTS, 
Transactions of the Society — pagu 
III. — The President’s Address on some Needless Difficulties in the 
Study of Natural History. By C. T. Hudson, LL.D., F.R.S. 129 
IV. — On the Variations of the Female Reproductive Organs, 
ESPECIALLY THE VeSTIBULE, IN DIFFERENT SPECIES OF UrO- 
PODA. Bv Albert D. Michael, F.L.S., F.Z.S., F.R.M.S., Ac. 
(Plate IV.) 142 
SUMMARY OF CURRENT RESEARCHES. 
ZOOLOGY. 
A. VERTEBRATA Embryology, Histology, and General, 
o. Embryology. 
Weismann’s (A.) Theory of Heredity 153 
Gulick, J. T . — Divergent Evolution and Darwinian Theory 155 
Huge, G . — Degeneration of Ova 156 
Bergu, R. S . — Professor JlabVs Memoir on the Theory of the Mesoderm 156 
Histology. 
Korschelt, E . — Morphology and Physiology of Cell-nucleus 156 
Lameere, a . — Karyogamic Reduction in Oogenesis 158 
Ryder, J. A . — Karyoldneds in Larval Amblystoma 158 
Looss, A . — Leucocytes in Tail of Tadpole 158 
Sanfelice, P.—r Origin of the Bed Blood-corpuscles 159 
y. General. 
Marenzeller, E. V . — Marine Phosphorescence 159 
Hoyle, W. E. — Deep-ivater Fauna of Clyde Sea-area 159 
B. INVERTEBRATA. 
Boeitger, O., & A. Walter — Fauna of Transcaspia and Khorasan 159 
Giard, a . — Relationship of Annelids and Molluscs 160 
Mollusca. 
Thiele, J . — Sensory Organs of Lateral Line and Nervous System of Mollusca .. IGO 
a. Cephalopoda. 
Hoyle, W. E . — Tract of Modified Epithelium in Embryo of Sepia 161 
Jatta, G . — Innervation of Arms of Cephalopoda 161 
y. Pteropoda. 
Boas, J. E. V. — Morphology ^ Classification^ and Chorology of Pteropoda ,. .. 162 
y. Gastropoda. 
MTntosh, W. 0 . — A Heteropod in British Waters 163 
Robert, E . — Reproductive Apparatus of Aplysise 163 
Mazzarelli, G. F . — Glands of Aplysise ., 164 
5. liamellibranchiata. 
Horst, R . — Nature of Byssus 164 
Dall, W. H . — Hinge of Pelecypods and its Development .. .. 164 
Pelseneer, P . — Fourth Pallial Orifice of some Lamellihranchs 165 
