( 2 ) 



JOURNAL 



OP THE 



EOYAL MICEOSCOPICAL SOCIETY. 



Ser. 2.— Vol. I. 



CONTENTS. 



Transactions of the Society — pa 



I. On CEcistes Janus and Flosoxjlabia teifolitjm, two new species 



OF Eotifers. By C. T. Hudson, M.A., LL.D., F.E.M.S. 

 (Plates I. and II.) 1 



(The Apebtubes of Microscope Objectives. By G. Shadbolt, 



F.K.M.S 154) 



Summary of Current Eesearohes relating to Zoology and 

 Botany (principally Invertebrata and Cryptogamia), Micro- 

 scopy, &c., including Original Communications from Fellows 

 AND others 



Zoology. 



7 



Rhythmical Character of Segmentaiion 



Secondary Yolk in the Germinal Vesicle of Mammalia 7 



Notochord of Mammals 8 



Embryology of Selachians .. .. 9 



Tail in the Human Embryo 11 



Structure and Life of Cells ... .. 11 



Formation of Epithelial Cells and Nuclei 16 



Gastric Epithelium .. .. 16 



Cells of Spinal Ganglia ..- 16 



Decompound Gastric Glands 17 



Eegeneration of Spinal Cord 17 



Spinal Root of Optic Nerve 18 



Retinal Vessels of Fishes 18 



True Origin of the Acoustic Nerve 18 



Auditory Ossicles of Mammals 18 



Krukenherg's Studies in Comparative Phv/Mhgy 19 



Secondary Muscle-icave 20 



Marine Organisms in Captivity 20 



Pelagic Animals .. .. 22 



Mutual Affinities of the Cuttle-fishes 22 



Affinities of the Cephalopoda 23 



Olfactory Organ of Terrestrial Pulmonate Gastropoda 24: 



Enibryo of Planorbis 2o 



Development of Paludinidse ' 27 



Pedal Nervous System of Paludina vivipara 27 



New Nudibranch 28 



New Archaic Mollusc 28 



Tunicata of the '■ Challenger^ Expedition 29 



North Polar Polyzoa 30 



Metamorphosis of the Bryozoa 30 



Olfactory Organs of Insects 33 



Structure of the Stigmata of Insects 34 



Wings of the Hymenoptera 35 



Development of the Dorsal Vessel of Chironomus 35 



Paltosoma torrentium, a Fly with Dimorphous Female 36 



Dorsal Blood-vessel of some Ephemerid Larvm 37 



