LIST OF ILLUSTRATIONS. 



I PLATES. Facing 



pags. 



1. Section of rat liver showing worms and eggs 1 



2. 1. Agonopsis aspcroculis; 2. SympJmrus bergi: 3. Notothenia gilberti 476 



3. 1. Notoiheiiia lattfrons; 2. N. squamiceps; 3. N. jordani 476 



4. 1. Notothmia longicauda; 2. Idiacanthus retrodorsulis; 3. Laemonema 



muhiradiata 476 



5. 1. Coryphuenoides ariommus; 2. Nezumia pudens 476 



6. 1 . Coelorhynchiis chilcnsis; 2. C. patagoniae 476 



7-25. North American Achorutinae, Neanurinae, and Podurinae 526 



26. Antennae of Aphycus and Aenasioidea 640 



27. Antennae of Aphycus 640 



28. Antennae of Aphycus and Aenasioidea 640 



29. Antennae of Aphycus, Aphycopsis, Pseudaphycus, and Fseudococcobius 640 



30. Antennae of Aphycus 640 



31. Antennae of Aphycus, Pseudaphycus, and Acerophagus 640 



32. Carapace of Baena hayi 646 



33. Plastron of Baena hayi 646 



34. Carapace of Aspiderctes lancensis 646 



35. Carapace and plastron bones of Aspidcretes lancensis 646 



36. New crabs from the eastern coast of North America 652 



TEXT FIGURES. 



Page. 



1. Strongyloides papillosus. Parasitic adult. Viilva 7 



2. Strongyloides papillosus. Posterior end of body of parasitic adult, an., 



anus; int., intestine; ov., ovary 7 



3. Strongyloides papillosus. Body of parasitic adult in region of vulva, e., 



egg; int., intestine; ov., ovary; ^d., uterus; iml., vulva 8 



4. Strongyloides papillosus. Female of free living generation, mi., anus; 6., 



posterior bulb of esophagus; e., egg in uterus; es., esophagus; int., intes- 

 tine; vul., vulva 8 



5. Trichinella spiralis. Male, enlarged 10 



6. Trichinella spiralis. Posterior extremity of male, showing extruded 



cloaca. 10 



7. Trichinella spiralis. Posterior extremity of male, showing clasping pro- 



jections and papillae 11 



8. Trichinella spiralis. Female 11 



9. Trichosomoides crassicauda. Male 13 



10. Trichosomoides crassicauda. Young female with male in vagina 14 



11. Trichosomoides crassicauda. Mature female with male in uterus 15 



12. Trichosomoides crassicauda. Vidva region of female 16 



13. Trichosomoides crassicauda. Vulva region of female 16 



14-15. Trochosomoides crassicauda. Female, showing extent of cuticular 



markings, and vulva region of female, showing cuticular markings 17 



16. Trichosomoides a'cissicauda. Posterior extremity of female 18 



VII 



