Xviii LIST OF ILLUSTRATIONS. 



FI. PAGE 



20. ^EaA NASUTA, Norrnan,. Slightly enlarged. (No. 55) 127 



21. ARCTURUS BAFFINI, Sabine. About the natural size. (No. 



59) ... ' 128 



22. NYMPHON ABYSSORUM, Norman. Slightly enlarged. (No. 56) 129 



23. THECOPHORA SEMISUBERITES, Oscar Schmidt. Twice the natural 



size. (No. 76) 147 



24. THECOPHORA IBLA (sp. n.). Twice the natural size. (No. 76) 148 



25. ARCHASTER VEXILLIFER (sp. n.). One-third the natural size. 



(No. 76) 150 



26. ZOROASTER FULGENS (sp. n.). One-third the natural size. (No. 



78) - 153 



27. OALVERIA HYSTRIX (sp. n.). Two-thirds the natural size. (No. 



86) ... 156 



' 28. OALVERIA HYSTRIX (sp. n.). Inner surface of a portion of the 

 test showing the structure of the ambulacral and mterambu- 

 lacral areas .... , 157 



29. CALVERIA FENESTRATA (sp. n.). One of the four-valved pedi- 



cellaria3 ... 159 



30. LOPHOHELIA PROLIFERA, Pallas (sp.). Three-fourths the natural 



size. (No. 26) 169 



31. ALLOPORA OCULINA, Ehrenberg 170 



32. OPHIOMUSIUM LYMANI (sp. n.). Dorsal surface. Natural size. 



(No. 45) 172 



33. OPHIOMUSIUM LYMANI (sp. n.). Oral surface 173 



34. DORYNCHUS THOMSONI, Norman. Once and a half the natural 



size ; everywhere in deep water 174 



35. AMATHIA CARPENTERI, Norman. Once and a half the natural 



size. (No. 47) 175 



36. CHRONDROCLADIA VIRGATA (sp. n.). One-half the natural size. 



(No. 33, PI. V.) 187 



37. THE ' CUP-LEAD ' 210 



38 ) ( 211 



* > BROOKE'S DEEP-SEA SOUNDING APPARATUS < 



o9. ) ( _ 1 > 



40. THE 'BULL-DOG' SOUNDING MACHINE 215 



41. THE ' FITZGERALD ' SOUNDING MACHINE 217 



42. THE 'HYDRA' SOUNDING MACHINE 218 



43. 'MASSEY'S' SOUNDING MACHINE 225 



44. OTHO FREDERICK MULLER'S DREDGE. A.D. 1750 239 



45. 'BALL'S DREDGE' 240 



46. THE STERN DERRICK OF THE ' PORCUPINE,' SHOWING THE 



' ACCUMULATOR,' THE DREDGE, AND THE MODE OF STOWING 



THE EOPE 248 



THE END OF THE DREDGE-FRAME 250 



