CONTENTS. 
' H 
Tbansaotions op the Society — page 
V. — Contribution to the Freshwater Alg2e op North Wales. 
By Wm. West, F.L.S., Lecturer on Botany and Materia 
Medica at the Bradford Technical College. (Plates V. 
and VI.) 277 
SUMMARY OF CURRENT RESEARCHES. 
ZOOLOGY. 
A. VERTEBRATA Embryology, Histology, and General, 
a. Embryology. 
Ryder, J. A. — Wetsmann*8 Theory of Heredity 307 
Chiarugi, G.— Human Embryo 307 
W ALDEYER, W. — Structure of the Placenta in Man and Monkeys . . 308 
Will, L . — Development of Platydactylus •• •• •• 308 
Morgan, T. H . — Amphibian Blastopore 308 
Mare, E. L . — Lepidosteus .. 309 
PiERSOL, G. A. — Structure of Spermatozoa . . . , 309 
/3. Histology. 
Turner, W. — CelUTheory, Past and Present 310 
Hoper, B . — Influence of Nucleus on Protoplasm 310 
E.— Biology of the Cell 310 
Rufper, A . — Phagocytes of Alimentary Canal 310 
Marshall, C. F . — Histology of Striped Muscle 311 
y. General. 
Haeckel, E . — Classification of the Metazoa 311 
Massart, J . — Sensitiveness and Adaptability of Organisms to Saline SoluUons .. 313 
M‘Coy, F . — Natural History of Victoria 813 
B. INVERTEBRATA. 
Whitelegge, T . — Marine and Freshwater Invertebrate Fauna of Port Jacks on and 
Neighbourhood .. .. ... ,, ’. 313 
Mollusca. 
Ball, W. H. — American Mollusca 313 
/8. Pteropoda. 
Peck, J. I , — Cymbuliopsis Calceola 314 
y. Gastropoda. 
Perrier, R . — Anatomy and Histology of Penal Organs of Prosobranch Gastropo'ds 314 
CuENOT, L . — Blood and Lymph-gland of Aplysise 
Beilgh, P.—Pleurophyllidiidfe .. 316 
Herdman, — . — Structure and Functions of Cerata in some Nudibranchiate Molluscs 316 
Fischer P,, & E. L. Bouyier — Organization of Sinistral Prosobranchiate Gastro- 
poda .. ., 
317 
