CONTENTS. 



Page 



I. Introductory Remarks 1 



II. General Historical View 4 



III. General Representation of the Family 24 



A. Structure and Development 24 



a. The Female 24 



b. The Male 35 



c. The Ovisacs and the Development of the Eggs 43 



d. The free Larva 47 



e. The post-larval Development ; the Pupae 53 



B. Habitation, Biology and Distribution 63 



a. The Place of the Hosts in the System and the Habitation of the Parasites 63 



b. Age and Sex of the Hosts 65 



c. Number of Parasites on each particular Host 68 



d. Number of Species of Parasites on the same Species of Host 69 



e. Number of Species of Hosts of the different Families 70 



f. Occurrence together with Parasites of other Orders or Classes 71 



g. Nourishment 72 



h. The Influence of the Parasites on their Hosts 73 



i. Geographical and Bathymetrical Distribution of the Family 75 



j. Geographical Distribution of the particular Species relatively to that of their Hosts 76 



k. Frequency of the Parasites in Proportion to their Fertility 76 



C. About Classification 78 



a. Limitation and Characters of the Species 78 



b. Limitation and Characters of the Genera 81 



c. Characters of the Family 83 



d. Place of the Family in the System 84 



IV. Description of Genera and Species 87 



/. Stenothocheres n. gen 88 



//. Homoeoscelis n. gen 93 



III. Sphmronella Salensky 98 



a. Parasites on Amphipoda 99 



b. Parasites on Cumacea 148 



c. Parasites on Isopoda 163 



IV. Choniostoma H. J. H 170 



V. Mysidion n. gen 177 



VI. Aspidoecia Giard and Bonnier 184 



Explanation of the Plates 191 



Errata 206 



