JOUENAL 



OF THE 



KOYAL MICEOSCOPICAL SOCIETY. 



VOL. 11. No. 5. 



CONTENTS. 



Transactions of the Society — paob 

 XXVI. On a New Species of Excavating Sponge (Aleotona 



MiLLARl) ; AND ON A NeW SpECIES OF KhAPHIDOTHEOA 



(E. AFFiNis). By H. J. Carter, F.E.S., &c 493 



XXYII. On a New Genus op Foraminifeba (Aphkosina in- 



FORMIS) ; AND SpICULATION OF AN UNKNOWN SpONGE. 



By H. J. Carter, F.E.S., &c 500 



XXVIII. On the Theory of Illuminating Apparatus employed 

 WITH the Microscope. Part I. By Dr. H. E. Fripp, 



Ex.-Off. F.E.M.S 503 



XXIX. Observations on Notommata Werneckii, and its Para- 

 sitism IN the Tubes of Vaucheria. By Professor 



Balbiani .. .. .. .. .. .. .. 530 



Ekoord of Current Eesearches relating to Invertebrata, 



Cryptogamia, Microscopy, &c. .. .. .. .. .. 545 



Zoology. 



Nucleus in Blood-corpuscles 545 



Division of Cartilage Cells 546 



Final Changes in Meckel' t Cartilage 546 



Histology of Nerve-fibre 546 



Microscopical Phenomena of Muscular Contraction 547 



Development of the Olfactory Nerve and Olfactory Organ of Vertebrates . . 547 



Digestive Ferments of the Invertebrata 548 



New Facts in the Anatomy of Molluscs 548 



Generative Organs of the Cephalopoda 549 



Observations on the Organization of Solenopus 550 



Organ of Bojanus in Anodon 551 



Development of the Salpidx 551 



Affinities of the Poly zoa 553 



Loxosoma 553 



Barbed Hoohlets on Spines of a Brachiopod 553 



Structure of the Cerebrum and Retina in the Arthropoda 554 



Formation of the Blastoderm and of the Germ-layers in Insects 554 



Mode of Recognition among Ants 555 



Toilet Habits of Ants 556 



Malformation in an Insect 558 



Parasitic Insects 558 



Notes on Phryganex 558 



Habits and Intelligence of Vespa maculata 559 



Observations on Peripatus 559 



Basilica Spider and her Snare 559 



Aeronautic Flight of Spiders 561 



New and other Pycnogonida 562 



Form of the Muscular Contraction in the Crayfish 562 



Amphion and Polycheles ( Willemoesia) 563 



Life-history of the Bopyrida} 563 



Development of the Annelidea ■ 563 



Anatomy of Magelona 567 



Arrangement of the Nerve Cords in the Annelides 569 



Gills of Serpuia 570 



New Annelids from the Philippines 571 



Trichinosis in a young Hippopotamus 571 



New Diseases of Hot-house Rabiaceas 572 



Female Organs of Echinorhynchus 572 



Jensen's Turbellarian Worms of Norway 573 



Reproductive Organs of the Marine Ect^arasitic Trematoda 573 



Organization of Axine and Microcotyle 574 



Life-history of the Tape-Worm of the Shreio 575 



