■^Iy contents. 



PAGE 



Simondsia paradoxa Pai't 1 58 



Monograph of the MeKcertidcB .. .. „ 58 



Observations on the Life-history of Stephanoceros 



Eichhornii. {Plate V. Figs. 1-^) Part 2 169 



Annelid Commensal with a Coral „ 204 



Structure and Division of Ctenodrilus monostylos .. .. „ 229 



Manayunkia speciosa „ 231 



Parasitic Nematode of the Common Onion „ 232 



New Myzostomata »> 232 



Bucephalus and Gasterostomum „ 282 



Development of Dendroccelum lacteum , 234 



Rotatoria of Giessen „ 235 



Motif er within an Acanthocystis „ 238 



Development of Worm Larvce . . . . Part 3 378 



Excretory Apparatus of Hirudinea „ 379 



Function of Pigment of Eirudinea „ 379 



Otocysts of Arenicola grubii „ 380 



Manayunkia speciosa ,, 380 



Life-history of Thalassema „ 381 



Spermatogenesis and Fecundation in Ascaris megalocephala „ 382 



Structure of Derostoma Benedeni „ 383 



Opisthotrema, a New Trematode „ 384 



Polycladidea „ 385 



Early Stages in the Development of Balanoglossus .. . . „ 388 



New Rotatoria „ 388 



Nervous System of Euniceidce Part 4 564 



Cerebrum of Eunice harassii, and its Relations to the 



Hypodermis „ 564 



Varieties of Branchiohdella varians „ 565 



Ovum and its Fertilization (in Ascaris) ,, 565 



Spermatogenesis in Ascaris megalocephala „ 567 



Spermatogenesis in Ascaris megalocephala „ 569 



Nematoids of Sheeps' Lungs „ 569 



Free-living Nematodes „ 570 



Trichina and Trichinosis „ 570 



Cystic Stages of TceniadcB „ 571 



Anatomy and Development of Trematoda „ 571 



Worm Fauna of Madeira „ 573 



New Species of Rotifer „ 573 



New Type of Hirudinea Part 5 744 



Structure of the Branchiae in Serpulacem „ 745 



Structure and Development of Fresh-water Dendrocosla . , „ 746 



Classification of the Rotifera „ 748 



New Pelagic Larva Part 6 892 



Head-kidney of Polygordius „ 892 



Nervous System of the ArchiatmelidcB „ 893 



Anatomy of the Hirudinea , . . . . „ 893 



External Morphology of the Leech „ 896 



Action of a Secretion obtained from the Medicinal Leech cm, 



the Coagulation of the Blood „ 896 



Organization of Echinorhynchi „ 897 



