CONTENTS. 



Tbansactions of the Society — paob 



IX. — Note on the Iiepkoductive Condition of Orbitolites com- 



TLANATA, VAU. LAOiNiATA. Bj Hciiry B. Biiuly, F.E.S. 



(BlateX.) 693 



X. — Notices of New Infusoria Flagellata from American 



Fresh Waters. By Alfred C. Stokes, M.D. (Plate XI.) .. G98 



SUMMARY OF CURRENT RESEARCHES. 



ZOOLOGY. 

 A. VERTEBRATA :— Embryology, Histology, and General, 

 a. Embryology. 



Weisman, a., & C. IscuiKAWX— Formation of Polar Globules in Animal Ooa .. 705 

 Hoffmann, C K. — Oricjin and Significance of the so-called free Nu<lei in the 



Nutrient Yolk of Bony Fishes 706 



Ryder, J. A. — Resemblance of Ovarian Ova and the Primilive Foraminif era .. 10<i 



IJiEURlNGER, J. — Inversion of the Germinal Layers in the Shreto 70() 



Ebneb, V. v., & E. Sertoli — Spermatogenesis of Mammals 707 



8 AN FELICE, F. — Spermatogenesis in Guinea-pig 707 



Massart, J. — Irritability of Spermatozoa of Frog 707 



HoussAY, F., & Bataillon — Development of the Azolotl 707 



KtPFFER, C. — Development of the Lamprey 708 



Weismann, a., & C. IscHiKAWA — Partial Impregnation 709 



IIertwig's {0.) ^ Human and Vertebrate Embryology' 710 



p. Histology. 



Leydig, F. — Cells and Tissues 710 



Arnold, J. — Ctll-division 712 



Ide, M. — Cell-membrane 712 



STEiSHArs, J. — Goblet-cells of Intestine of Salamander 712 



Flesch, M. — Micro-chemi>'try of Nerve-cells 712 



Janosik, J. — Histology of the Ovary 713 



y. General. 

 LoEB, J. — Influence of Light on Oxidation 714 



B. INVERTEBRATA. 



Griffiths, A. B. — Problematical Organs of the Invertebrata 714 



FoL, H. — Distribution of Striped Muscle 714 



Mollusca. 

 y. Gastropoda. 



Peerier, R. — Comparative Histology of Glandular Epithelium of Kidney of Proso- 



branch Gastropods 715 



Hanitsch, R. — Anatomy and Histology of Limax agrestis 716 



Garnavlt, p. — Anatomy and Histology of Cyclostoma elegans 716 



Petit, L. — Effects of Lesion of Siipra-cesophageal Ganglia in Snails 717 



Willem, V. — Creeping Movements 718 



VAYSsiiiBE, A. — Systematic Position of Hero 718 



Garnault, F. — Anatomy of Valvata piscinalis 7J8 



8. I<axaellibranchiata. 

 Grobben, C. — Pericardial Gland 720 



Molluscoida. 



iS. Bryozoa. 



IIarmer, S. F. — Eml/njogeny of Ectoproctous Bryozoa 721 



