| Stomias Boa. After Filhol, ‘La Vie au Fond des Mers’ | Frontispiece | |
| FIG. | PAGE | |
|---|---|---|
| 1 | Diagram illustrating the Passage of an Ocean Current across a Barrier | 32 |
| 2 | Sicyonis crassa. After Hertwig, ‘“Challenger” Reports’ | 36 |
| 3 | Globigerina Ooze. After Agassiz, ‘Voyages of the “Blake”’ | 38 |
| 4 | Section through the Eye of Serolis schythei. After Beddard, ‘“Challenger” Reports’ | 74 |
| 5 | Section through the Eye of Serolis bromleyana. After Beddard, ‘“Challenger” Reports’ | 74 |
| 6 | Opostomias micripnus. After Günther, ‘“Challenger” Reports’ | 78 |
| 7 | Head of Pachystomias microdon. After Von Lendenfeld, ‘“Challenger” Reports’ | 79 |
| 8 | Section through the Anterior Sub-orbital Phosphorescent Organ of Pachystomias microdon. After Von Lendenfeld, ‘“Challenger” Reports’ | 80 |
| 9 | Challengeria Murrayi. After Haeckel, ‘“Challenger” Reports’ | 90 |
| 10 | Umbellula Güntheri. After Agassiz, ‘Voyages of the “Blake”’ | 97 |
| 11 | Rhizocrinus lofotensis. After Carpenter, ‘“Challenger” Reports’ | 100 |
| 12 | Rhabdopleura normani. After Lankester, ‘Contributions to our Knowledge of Rhabdopleura and Amphioxus’ | 112 |
| 13 | A Single Polypide of Rhabdopleura normani. After Lankester, tom. cit. | 114 |
| 14 | Bathyteuthis abyssicola. After Hoyle, ‘“Challenger” Reports’ | 121 |
| 15 | Bathynomus giganteus. After Filhol, tom. cit. | 131 |
| 16 | Euphausia latifrons. After Sars, ‘“Challenger” Reports’ | 134 |
| 17 | Bentheuphausia amblyops. After Sars, ‘“Challenger” Reports’ | 134 |
| 18 | Polycheles baccata. After Spence Bate, ‘“Challenger” Reports’ | 136 |
| 19 | Colossendeis arcuatus. After Filhol, tom. cit. | 141 |
| 20 | Hypobythius calycodes. After Moseley, ‘“Challenger” Reports’ | 145 |
| 21 | Melanocetus Murrayi. After Günther, ‘“Challenger” Reports’ | 156 |
| 22 | Saccopharynx ampullaceus. After Günther, ‘“Challenger” Reports’ | 164 |