Vlil CONTENTS. 



PAGE 



XIX.— Apparatus for Photomicrography with the Microscope standing in any 

 Position, especially in Inclined Position, Liy Domingo de Orueta, 

 F.R.M.S. (Figs. 70, 71) 588 



XX.— A Method of Disintegrating Bacteria and other Organic Cells. By J. 



Edwin Barnard, F.R.M.S. (Plate XVDX and Figs. 72, 73) .. .. 592 



XXI. — The Re-appearance of the Nucleolus in Mitosis. By E. J. Sheppard. 



( Plate XIX.) 598 



XXII. — I. On the Structure of Scales from Thermobia domestica (Packard). 

 ii. Description of a Model Producing an Optical Effect similar to the 

 Cuneate Markings on Insect Scales. By James Strachan. (Plate 

 XXIV.) 717 



XXIII. — Instantaneous Exposure in Photomicrography. By "Walter Bagshaw. 



F.R.M.S. .. 721 



XXIV. — The Structural Detail of Coscinodiscus asteromphalus. By T. W. 



Butcher, M.B. CM. F.R.M.S. (Plates XXV.-XXVII.) 722 



XXV.— New British Enchyirreids. By The Rev. Hilderic Friend, F.L.S. F.R.M.S. 



(Plate XXVIII.) , 730 



SUMMARY OF CURRENT RESEARCHES 



Relating to Zoology and Botany (principally Invertebrata and 

 Cbyptogamia), Microscopy, &c, including Original Communications 

 from Fellows and Others.* 29, 185, 344, 453, 603, 737 



ZOOLOGY. 



VERTEBRATA. 



a. Embryology- 



Guyer, M. F. — Accessory Chromosomes in Man 29 



Molle, J. van — Mammalian Spermatozoon 30 



Davenport, Gertrude C, & Charles B. — Inheritance of Skin-pigmentation in 



Man 30 



Morse, Max — Sterility 30 



Mironescu, T. — Islands of Langerhans in the Human Embryo 31 



Kuntz, A. — Development of the Sympathetic Nervous System in Mammals . . .. 31 



„ Development of the Sympathetic Nervous System in Birds 32 



O'Donoghue, Chas. H. — Duplicity in Chick Embryos 33 



Pearl, R., & F. M. Surface — Inheritance in Hybrid Poultry 34 



„ „ „ Inheritance of Colour-pattern in Hybrid Poultry .. 34 



Schmalhausen, J. J. — Development of Limbs in Salamandrella kayserlingii .. .. 35 



Hefford, A. E. — Toleostean Ova and Larvae 35 



Thomson, J. Arthur — The President's Address : The Determination of Sex .. .. 141 



Hektwig, O. — Influence of Radium Rays on Ova. and Sperms 185 



Rlckert, J. — Polyspermy 185 



Gregoire, Victor — Unity af Meiotic Process in Plants and Animals 186 



< rEDDES, A. ( '. — Abnormal Bone-growth in Absence of Functioning Testes .. .. 186 

 Tschiuwinsky, N. — Influence of Malnutrition and Castration on Development of 



Sheep's Skeleton 186 



Staoh, J. — Development of Babbit's Teeth 186 



Bruni. A. C — Development of Vertebral Column in Iteptiles and Birds 186 



* In order to make the Contents complete, the papers printed in the ' Transactions ' 

 and the Notes printed in the 'Proceedings' are entered here. 



