JOUKNAL 



OF THE 



EOYAL MICROSCOPICAL SOCIETY. 



Ser. 2— Vol. III. Part 4. 



(ATJGTJST, 1883.) 



CONTENTS. 



Tbansaotions of the Sooiety— 



PAOK 



VII. — On the Ebd Mould of Bablet. By Charles George Matthews, 



F.C.S., F.LC. (Plates V. and VI.) 321 



X. — On the Spicules of Cucumabia hyndmanni, C. calcigeba, 

 AND TWO ALLIED FOBMS. By Professor F. Jeffrey Bell, M.A., 



Sec.K.M.S. (Plate VIII.) 481 



XI. — On a Method of Pbesebving the Fbesh-wateb Medusa. By 



Peter Squire, F.L.S. (Fig. 90) 485 



Summary of Cubbent Eeseabches belating to Zoology and 

 Botany (pbincipally Inveetebbata and Cbyptogamia), Miobo- 



SCOPY, &C., INCLUDING ObIGINAL COMMUNICATIONS FROM FbLLOWS 



and othebs 487 



Zoology. 



Early Stages of the Guinea-pig Ovum .. .. 487 



Activity of the Yolk during Impregnaiion 488 



Germ-layers and Gastrula of the Mouse 488 



Embryology of Mice ., • 489 



Embryology of Rodents 489" 



Origin of the Vertebrate Mesoderm 489 



Histology of the Ovary cf MammaJs .• .. 490 



Histogenesis of Nerve-fihres •• .. 491 



Olfactory Lobes in Vertebrates and Higher Arthropoda 491 



Colouring Matter of Egg-shells 491 



Presence of Glycogen in Embryos of Squalidx 493 



Biological St^^dies • •• 493 



Structure of the Nucleus .• 494 



Chromatophores of Cephalopoda t. .. 494 



Development of Chromatophores of Sepiola 494 



Organization of Chitons .. .. .. •• 495 



Characters of Marionia 496 



Ova of Ascidians 497 



Oxycorynia, a new Synascidian Genus 498 



Histology and Development of Insects 499 



Markings on Podura Scales 501 



Dermal Appendages of Polyxenus 501 



Pairing of Tegenaria guyonii — Organs in the Mcde Abdominal Sexual 



Region 502 



Anatomy of Pentastomum oxycephcdum 503 



Demodex phylloides 503 



Larval Development of Phoxichilidium Plumulariie 504 



Relationships of the Malacostraca ., .. 504 



Circulatory Organs of Stomatopoda .. 506 



Copepoda living in Molluscs and Ascidians 507 



American Parasitic Copepoda 507 



