REPORT ON THE PYCNOGONIDA. 167 
Pycnogonids of the “ Knight Errant,” 94. 
Pyenogonids of last English Arctic expedition, 4. 
Pyenogonids of the Mediterranean, 4. 
Pyenogonids of Mozambique, 6. 
Pycnogonids of New England, 5, 
Pyenogonids of New England and adjacent waters, 
147. 
Pycnogonids of North America, 5. 
Pycnogonids of the North Georgian Islands coast, 3. 
Pycnogonids of Northern Europe, 3, 6. 
Pycnogonids of the Northern part of the North 
Atlantic, 4. 
Pycnogonids of the Norwegian coast, 3, 4. 
Pyenogonids of Port Blair, Andaman Islands, 6. 
Pyenogonids of Russian Lapland, 3. 
Pyenogonids of the second German North Polar 
Expedition, 3. 
Pycnogonids of Singapore, 6. 
Pycnogonids of the South Sea, 5. 
Pycnogonids of the Straits of Magellan, 6, 
Pycnogonids of the White Sea, 3. 
Pycnogonids of the “ Willem Barents,” 94. 
Pycnogonum, 2, 9, 35, 93. 
australe, 36. 
chelatum, 24. 
grossipes, 44. 
litoraie, 7, 35, 99. 
litorale, var. tenue, 36. 
spinipes, 30. 
Quatrefages, A. de, referred to, 4. 
Range, bathymetrical, compared with geographical 
distribution, 10. 
Range in depth, 7. 
Range, world-wide, of the deep-sea forms, 10. 
Rhopalorhynchus, 6, 28. 
kroyerti, 28. 
Rhynchothorax, 5, 9, 24. 
mediterraneus, 24. 
Sars, G. O., referred to, 4, 95, 97, 144. 
(ZOOL. CHALL. EXP,—PART x,—1881.) 
Savigny, J. C., referred to, 2. 
Savigny, referred to, 14. 
Sabine, E., referred to, 3. 
Scceorhynchus, 147. 
armatus, 147. 
Scalpellum, sp., 2 commensal of Nymphon robustum, 
98, 144. 
Sch6bl, referred to, 130. 
Semper, C., referred to, 13, 108, 134. 
Sete on the integument, 102. 
Sexual characteristics, external, 130. 
Slater, H. H., referred to, 6. 
Smith, referred to, 5. 
Somatic cavity, 127. 
Species, catalogue of the, 17. 
Species, description of the Challenger, 36. 
Spines on the surface of the body, 104. 
Spines, denticulated ones, 104. 
Spines, serrated ones, 104. 
Stimpson, W., referred to, 5. 
Summary of the Report, 145. 
Tanystylum, 6, 9, 27. 
orbiculare, 27. 
styligerum, 27. 
Testis, 128. 
Testis, microscopical structure of, 130. 
Threads, given off by the glands in the foot-jaw of 
the larvee, 141. 
Verrill, referred to, 5. 
White, A., referred to, 5. 
Wilson, E. B., referred to, 5, 82, 94, 146. 
Wood-Mason, J., referred to, 5, 62. 
Wyville Thomson, C., referred to, 95. 
Zenker, referred to, 100, 108. 
Zetes, 3, 9, 25, 88. 
hispidus, 25. 
spinosa, 26. 
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