CONTENTS. XVU 



FAGB 



JouRDAN, E. — Elytra of some Polynoina , . . . . Part 3 456 



Mtjkdoch, J. — New Arenicola from Arctic Alaska „ 456 



FOETTINGEK, A. — JlistriobdeUa homari „ 456 



HoBST, K. — Problematical Organ in Chlorxmidai „ 457 



Haswbll, W. a. — Segmental Organs of Serpula , 458 



BuTSCHLi, O. — Origin of the Nervous System of Nematodes „ 458 



ViLLOT, A. — Host of the Larva of Uchinorhyncus clavieceps „ 459 



NiEMiEC, J. — Nervous System of Tsenise „ 459 



Looss, A. — Aroatomy of the Trematoda , 460 



Bateson, W. — Development of Balanoglossus Kowalevskii, and the 



Affinities of the Enteropneusta „ 461 



Hudson, 0. T. — On four new Species of the Genus Floscularia, and five 



other new Species of Eotifera. (^Plate XII.') Part 4 608 



VoiGT, W. — Oogenesis and Spermatogenesis in Branchidbdella „ 643 



Leidy, J. — New Parasitic Leech „ 643 



Michaelsen, W. — Archenchytrseus Mobii „ 643 



Peutot, G. — Nervous System of Polychxtous Annelids „ 644 



Fewkes, J. W. — Larval forms of Spirorbis borealis „ 644 



ScHAEFF, K. — Skin and Nervous System of Priapulus and B'alioryptus .. „ 645 



JOLIET, L. — Development of Sphwrularia bombi „ 646 



FoTJRMENT, L. — New Nematodes from Merlangus „ 646 



NiEMiEC, J. — Nervous System of Bothriocephalidse . . . . „ 646 



ZscHOKKE, F. — Parasites of Fresh-water Fishes ) „ 647 



Eamsay-Weight, E. — Free-swimming Sporocyst „ 648 



Peeeyaslawzew, S. — Development of Turbellaria . . . . „ 648 



SiLLiMAN, W. A. — Fresh-water Turbellaria of North America .. ,. „ 648 



Bateson, W. — Later Stages in the Development of Balanoglossus . , ,. „ 650 



Saint-Loup, E. — Organization of the Hirudinea Part 5 807 



Hatschek, B. — Development of the Head of Polygordius „ 808 



Hallez, p. — Development of Nematodes „ 809 



Letjckaet, E. — Development of Sphierularia bombi „ 810 



Leidy, J. — New Bothriocephalus „ 810 



Otjdemans, a. 0. — Circulatory and Nephridial Apparatus of the Nemertea „ 810 



Salensky, W. — Development of Monopor a vivipar a , 811 



Beddabd, F. E. — Nephridia of Acanthodrilus sp „ 813 



Zachaeias, O. — Nephridia of Microstoma lineare ,. .. „ 813 



Ddplessis-Goueet, G. — Fresh-water Monotidgs. „ 813 



Peeroncito, E. — Action of Sodium Chloride on Cercarias „ 814 



Geaef, L. t. — New Species of Myzostoma „ 814 



Imhof, O. E. — Pelagic and Fresh-water Rotatoria ,, 814 



Haswell, W. a. — Symbiosis of Worms and Sea-Anemones Part 6 982 



ViGDiEE, 0. — Pelagic Annelids „ 998 



Haekeb, A. — Coloration of the Anterior Segments of the Maldanidie .. „ 999 



Beddabd, F. E. — Nephridia of a new species of Earthworm „ 999 



Saint-Lotjp, E. — Organization of Pachydrilus enchytrxoides .. .. „ 1000 



Haswell, W. A. — Parasite of the Rock Oyster „ 1000 



Eeighaed, J. — Anatomy and Histology of Aulophorus vagus „ 1001 



LiNSTOW, O. V. — Angiostomum „ 1001 



Bell, F. J. — Gordius verrucosus „ 1002 



Thomas, J. D. — Experimental Breeding of Tsenia Echinococeus .. .. „ 1002 



Ser. 2.— Vol. V. h 



