Xll LIST OF PLATES. 



PLATE XYII. 

 1. Cythere albo-maculata. 2. Cypridina Macandrei : a, sliell; 

 b, animal. 3. Cyclops quadricornis : a, male ; b, female ; c, d, 

 larvae. 4. Diaptomus Castor. 



PLATE XVIII. 



1. Anomalocera Patersonii. 2. Cetochilus septentrionalis. 

 3. Notadelphys Ascidicola. 4. Peltidium purpureum. 



PLATE XIX. 



1. Argulus foliacens. 2. Lepeophtheirus Stromii : a, male ; 

 b, female. 3. Pandarus bicolor. 4. Lsemargus muricatus. 5. 

 Anthosoma Smithii. 



PLATE XX 



1. Nicothoe Astaci: a, b, larvae. 2. Lerneopoda elongata. 

 3. Lerneonema Sprattaa : a, three specimens attached to a 

 Sprat. 4. Lernea branchialis. 



