( 2 ) 



JOURNAL 



OF THE 



KOYAL MICEOSCOPICAL SOCIETY. 



Ser. 2.— Vol. III. Part B. 



(OCTOBER, 1883.) 



CONTENTS. 



Tbansaotions op the Society — 



FAOE 



XII. — On Asplanohna Ebbesboenii nov. sp. By 0. T. Hudson, 



LL.D., F.K.M.S. (Plates IX. and X.) 621 



Summary op Cuerent Eesearohes relating to Zoology and 

 Botany (principally Inveetebeata and Ceyptogamia), Micro- 

 scopy, &c., including Oeiginal Communications from Fellows 



AND othees 629 



Zoology. 



Aspeets of (he Body in Vertebrates and Invertebrates 629 



Ancestral Form of the Chordata 629 



Hypophysis cerehriin Vertebrata and Tunioata 630 



Origin of the Follicular Cells 630 



Cells of the Ovarian Follicle 631 



Bizzozero^s New Blood-corpuscle and Norris's Third Corpuscular Element 631 



Colour-markings of Mammals 631 



Retina of Ganoids 632 



Influence of Sea Water on Fresh-water Animals, and of Fresh Water on 



Marine Animals 632 



Badial and Bilateral Symmetry in Animals 633 



Symbiosis of Bryozoa and Actinix 635 



Digestive Processes in Cephalopoda 636 



Suckers of Cephalopods 636 



Development of Gastropoda 637 



Liver of Gastropoda .. 637 



Sensory Organs of Gastropoda .. .. * 638 



Pedal Nerves of Haliotis 638 



Pedal Glands of MoUusca 639 



Glands of Aplysia and allied Forms 640 



Sexual Characters of Oysters 640 



Development of Salpx and Pyrosomata 642 



Structure of Anchini a.. .. 642 



Development of Brachiopoda . . . . 643 



Eyes of Arthrojwda 644 



Results of Decapitation in Insects and Myriopoda .. ., . . . . ". . . . 645 



IJse of an adhesive substance by Arthropoda in jumping 646 



Relation of Light to Colour in Evolution of Species 646 



Constancy and Methodic Habits of Insects in their Visits to Flowers .. ., 646 



Rudimentary Wings in the Coleoptera 647 



Clasping Organs, accessory to generation, in Lepidoptera 648 



Colour Preferences in Nocturnal Lepidoptera 650 



Scolopendrella .. .. 651 



Auditory Uairs of Arachnida 652 



Integument of Decapod Crustacea 652 



Sense of Colour among some of the Lower Animals 654 



