Halteres, 91. 
Head-fold, 109. 
Heart of cockle, 55 ; of Periwinkle, 
59; of Garden Slug, 62; of Sea 
Snail, 67 ; of Shore Crab, 75 ; of 
Sea Mullet, 96. 
Hemiptera, 105, 131. 
Hepatic duct, 95. 
Hermaphrodite, 12. 
Hermaphrodite duct, 62, 70. 
Holocephala, 110. 
Holothuroidea, 102. 
Homodynamy, 8. 
Homology, 8. 
Hydrocoralla, 100. 
Hydroida, 100. 
Hydrozoa, 99. 
Hymenoptera, 106, 125. 
Hypoblast, 6. 
Hyracoidea, 119. 
I. 
Ichthyropterygia, 112. 
Impregnation, 12. 
Indigenous, 13. 
Infusoria, 99. 
Insectivora, 120. 
Inter-operculum, 93, 
Inter-radial coeca, 40. 
Inter-radial septa, 40. 
Intrinsic muscles, 69. 
Introduced animals, 13. 
Intussusception, 4. 
Invagination, 6. 
Iris, 98. 
Irritability, 3. 
K. 
Kidneys, 97. 
L. 
Labial appendages, 90. 
Labium, 84. 
Labrum, 84. 
Labyrinthodonta, 1.2. 
Lacertilia, 113. 
Lamellibranchiata, 107. 
INDEX. 
145 
Lamellirostres, 117. 
Lemuroidea, 120. 
Lepidoptera, 105, 134. 
Ligament, 57. 
Ligula, 90. 
Liver of Sea-squirt, 51 ; of Cockle, 
57: of Periwinkle, 59 ; of Garden 
Slug, 63; of Sea Snail, 68; of 
Shore Crab, 76 ; of Sea Mullet, 95. 
Longipennes, 117. 
Lophobranchii, 111. 
Lucernarida, 100. 
Lung, 11. 
Lymphatics, 96. 
M 
Malpighian tubes, 81, 89, 
Mammalia, 118. 
Mandibles, 78, 84. 
Mantle, 50, 53. 
Marsipobranchii, 110. 
Marsupiaha, 118. 
Maxille, 84, 90. 
Maxillary palpi, 90. 
Maxillipedes, 78. 
Mediastinal vein, 91. 
Medullary groove, 130. 
Medullary sheath, 9. 
Mesenteric septa, 45, 
Mesenteries, 37, 96. 
Mesoblast, 7. 
Mesoderm, 38. 
Metazoa, 6. 
Metamere, 7. 
Mollusea, 107. 
Molluscoida, 106. 
Monkeys, 120. 
Monodelphia, 118. 
Monotremata, 118. 
Morphology, 5. 
Morula, 6. 
Muscle, 7. 
Muscular tissne, 9, 34, 48, 54, 60, 64, 
76, 77, 83, 88. 
Myocomma, 94. 
Myriapoda, 105. 
N 
Nematoidea, 101. 
Nerve cells, 9. 
