XVIU 



LIST OF ILLUSTRATIONS. 



1. Gregarina of the Earth- 



worm, , 



2. Morphology of Rhinopoda, 



3. Actinophrys sol, 



4. Morphology of Foramini- 



/era, 



5. NummuUtes Icevigatus, 



6. Acanthometrina and Poly- 



cystina, 



7. Morphology of ^d:if/£)/(Znff 



8. Diagram of Spongilla, 



9. Morphology and reproduO' 



tion of Spcngida, . 



10. Morphology of InjFusoria, 



11. Vaginicola., Stentor, and 



Vorlicella, . 



12. Morphology oi Hydrozoa, 



13. Morphology of 6'(??77z/rt^£j:, 



14. Reproductive processes of 



Hydrozoa, 



15. Medusiform gonophore of 



Clytia, 



16. Tub-ularia indivisa^ 



17. Seriularia pinnata and 



Campanularia neglecta, 



18. Morphology of Oceanic 



Hydrozoa, . 



19. Diphyes appendiculata, 



20. Physalia vtriculus and 



Velella vulgaris, . 



21. Morphology of jl/^(faj/(/££, 



22. Group of naked-eyed il/fi/- 



VS(B, 



23. I.ucernaria auricula, 



24. Development of Lucer- 



narida, 



25. Generative zooid of C4>-j/- 



saora, . . . . 



26. Generative zooid of Rhi- 



zostoma, 



27. Morphology of Grapto- 



lites, , , . , 

 2S. Didymograpsus V-fractus, 

 29. Transverse section of an 



Actinozoon and Hydro- 



ZOOttt , . . . 



47 

 49 

 52 



54 

 60 



61 

 63 

 65 



€6 

 71 



75 

 84 

 86 



87 



88 

 89 



91 



94 

 96 



99 

 loi 



102 

 loS 



107 



108 



109 



112 

 113 



"5 



FIG. 



30- 

 31- 



32- 

 33- 



34- 



35. 

 35- 

 37- 

 38. 

 39- 

 40. 

 41. 



42. 

 43- 



44. 



45- 



46. 

 47- 



48. 

 49. 

 SO- 



51- 

 52. 



S3. 



54. 



55- 

 56- 



57- 

 58. 



59- 

 60. 



61. 



Dia- 



and 



Diagram oi Actinia, 

 Actinia rosea and Arach- 



nactis albida. 

 Morphology of Corals, 

 Sclerodermic and Sclero- 



basic Corals, 

 Pennatula phospkorea, 

 Virgularia mirabilis, 

 PUurobrachia pileus. 

 Morphology of Ctenophora^ 

 Structure of Coral-reefs, 

 Morphology of Echinotdea, 

 Cidaris papillata. 

 Larva of Echirtus, 



gram of Echinus, , 

 Crlbella oculata, 

 Ophiura textiirata 



Ophiocoma neglecta, 

 Rhizoa inus Lofotensis, 

 Comatula rosacea, larva 



and adult, 

 EchinospktBrites aurantium 

 Thyone papulosa. 

 Morphology of Tceniada, 

 Trematoda, 

 Morphology of Turbel- 



laria, . 

 Echinorhynchus gigas, 

 A nguillula aceti and Dory- 



laimus stagnalis, 

 Hydatina senta and Meli 



certa ringens. 

 Diagram of an Annulose 



animal, 

 Syrinx nudus, . 

 Diagrammatic section of 



an Annelide, 

 Medicinal Leech 

 Serpula contortuplicaia 



and Spirorbis communis. 

 Nereis, 

 Errant Annelides, 



rAGB 



"S 



117 



120 



121 

 127 



131 

 132 

 136 



145 

 146» 



151 



154 



156 



157 

 159 

 161 

 169 

 172 



174 

 J 76 



177 



181 



18s 

 186 



187 

 190 



193 

 196 

 197 



Diagram of the Somite of 

 a Crustacean, 

 62. Morphology of Lobster . 



203 

 2or 



