CONTENTS. XV 



PAGE 



Part 1 47 



Anatomy of the Liver-Fluke 



Monoaraph on the Gysticerci ,> 50 



SeisZ .. PaTt2 244 



Organization of Echiurus Pallasii „ 245 



Nematode Worms in the Urine ,i 249 



Studies on the Cestoda „ 249 



New Cestoid Worm u 250 



Loss of Hooks and of the Scolex in the TwniadcB .. ■■ „ 250 



Development of Hermella aheolata Part 3 456 



Anatomy of Sternaspis scutata „ 457 



Entozoic Vermes >» '*5' 



Structure of the Cestoda, and especially of Tetrabothriidce 



and Tetrarhynchidce ,> ^^^ 



New Form of Cestode, of the Type of the Cysticercus of 



Arion 



460 



New Form, of Segmental Organ in the Trematoda . . . . „ 460 



Excretory Apparatus of the Turhellaria „ 460 



Observations on the Orthonectida „ 461 



Systematic Position of Balanoglossus j. 462 



Organization of Sternaspis scutata Part 4 601 



Syngamus trachealis of Pheasants „ 602 



Excretory Organs of Trematoda and Cestoda ,, 602 



Ccelom and Nephridia of Platyhelmia „ 604 



Anatomy of Distomum clavatum >, 604 



Development of Tricuspidaria nodulosa „ 604 



Eye of Planarians » 605 



On a supposed new Boring Annelid. {Plate IX.) .. .. Part 5 717 



New Annelids from the North Sea .. .. ' ,, 737 



New Lumbricina '> ''^' 



Occurrence of Corpuscles in the Red Vascular Fluid of 



Chcetopods t 738 



Thalassema neptuni >» 738 



Organization and Development of the Gordii „ 738 



Monograph of the Anguillulidm „ 739 



Formation of the Cyst in Muscular Trichinosis „ 740 



Development of the Liver-Fluke ,, 740 



Trematoda of Greenland „ 741 



Excretory Organs of the Trematoda and Cestoda .. .. „ 741 



Embryonic Development of Tcenia „ 742 



Germinal Layers of Planarians „ 743 



Organization of Terrestrial Lumbricina Part 6 887 



Action of Worms in the Formation of Mould „ 888 



Prefecundation in Spio „ 890 



Northern Gephyrea ? 890 



Hamingia glacialis » "91 



Anatomy of Sipunculus nudus ,. 892 



Development of Tricuspidaria nodulosa „ 892 



Development of the Trematoda ,, 892 



Distomum of the Crayfish „ 893 



Urinary Apparatus and Blood-lymph Spaces of the 



Flatodes » 893 



