164 THE VOYAGE OF H.M.S. CHALLENGER. 
Crustaceans, 2. 
Crustacés aranéiformes, 2, 17. 
Crustacea haustellata, 17. 
Cyamus ceti, 2. 
Davidson, referred to, 8. 
Decalopoda, 6. 
Depth, 8. 
Disecoarachne, 9, 29, 74. 
brevipes, 7, 29, 74. 
Distribution, geographical, 11. 
Distribution, geographical, compared with bathymet- 
rical range, 10, 
Dohrn, A., referred to, 5, 100, 108, 128, 129, 134, 
136, 141. 
Egg, 136. 
Egg-packets, number, 136. 
Egg packets, egg in the packet, 136, 
Eggs of parasitic animals in the interior of Nymphon, 
143. 
Eggs in capsules in connection with the integument 
of Colossendeis, 143, 
Eggs, way in which they are laid, 131. 
Eggs, ovarian, structure and formation, 132. 
Fights, referred to, 6. 
Embryos, 139. 
Embryology of the Pyenogonida, 100, 134. 
Endeis, 5, 9, 29, 76. 
didactyla, 29. 
gracilis, 29. 
Eye, original, 111. 
Eye, highly developed, 112. 
Eye, rudimentary, 112. 
Hyes, 119. 
Eyes, their occurrence according to the depths they 
inhabit, 120, 
Eyes, minute structure of, 122. 
Fabricius, J. C., referred to, 2. 
Fabricius, O., referred to, 2. 
Fat-cells, 127 
Foxichilus pigmeus, 35. 
Frey, H., and Leuckart, R., referred to, 4. 
Ganglia, histological structure, 119. 
Ganglia, minute structure, 118. 
Ganglia, development of, 139, 
Ganglia, thoracic, 112, 116. 
Ganglia, paired proboscideal, 113. 
Ganglia of the inner surface of the integument, 116. 
Ganglia, abdominal, 117. 
Ganglion, azygous proboscideal, 110. 
Ganglion, supra-cesophageal, 109. 
Ganglion in the course of the optic nerve, 111 
Ganglion, first thoracic, 112. 
Ganglionic nerve bundles of the proboscis, 113. 
Ganglionic nerve bundles of the proboscis, function, 
115. 
Gay, referred to, 6. 
Genera, list of the, 9. 
Genital organs, 128. 
Genital pores, 129. 
Germ-layers, 138. 
Glands, female, 131. 
Glands, male, 128. 
Glands of the ovigerous legs, 105. 
Glands of the palpi, 105. 
Glands of the integument, 101. 
Glands of the fourth joint of the leg of the male, 
106. 
Glands in the first joint of the foot-jaw of the larve, 
140. 
Glands (pancreatic), 125. 
Gnamptorhynchus, 6, 147. 
ramipes, 25, 56. 
Goodsir, Harry D. S., referred to, 3, 134, 
Graber, V., referred to, 123. 
Grenacher, H., referred to, 121. 
Grube, E., referred to, 4, 5. 
Hairs on the surface of the body, 104. 
Hannonia, 9, 34, 92. 
typica, 7, 34, 92. 
Heart, 127. 
Heart, development of the, 138. 
Heller, C.; referred to, 4, 94. 
Hesse, referred to, 4. 
Hodge, G., referred to, 3. 
Hoek, P. P. C., referred to, 4, 93, 100, 108, 134. 
Huxley, referred to, 14, 102. 
Hydrachna, 1, 2. 
Insecta uptera, 1. 
Integument, 100. 
Integumentary glands, 101. 
Integumentary cavities, 102. 
Integumentary cavities, their number, 103, 104. 
Intestine, structure of the wall of, 126. 
Jarzynsky, Th., referred to, 3, 6. 
Johnston, G., referred to, 1, 2, 134. 
Joints of the legs, names, 16. 
