LIST OF ILLUSTRATIONS. 



FIG. PAGK 



48. DREDGE-FRAME, SHOWING THE MODE OF ATTACHMENT OF THE 



BAG 251 



49. THE END OF THE DREDGE-FRAME, SHOWING THE MODE OF 



ATTACHMENT OF THE BAG 252 



50. DIAGRAM OF THE RELATIVE POSITION OF THE VESSEL, THE 



WEIGHTS, AND THE DREDGE, IN DREDGING IN DEEP WATER 253 



51. DREDGE WITH 'HEMPEN TANGLES' 257 



52. SET OF DREDGING SIEVES 260 



53. THE MILLER-ASELLA MODIFICATION OF Six's SELF- REGISTER 



ING THERMOMETER 291 



54. COPPER CASE FOR PROTECTING THE MILLER-CASELLA THER 



MOMETER 292 



55. SERIAL SOUNDING, Station 64 ... 312 



56. SERIAL SOUNDING, Station 87 312 



57. CURVES CONSTRUCTED FROM SERIAL SOUNDINGS IN THE '\VARM'- 



AND 'COLD-AREAS' IN THE CHANNEL BETWEEN SCOTLAND 



AND FJiROE 315 



58. CURVES CONSTRUCTED FROM SERIAL AND BOTTOM SOUNDINGS IN 



THE CHANNEL BETWEEN SCOTLAND AND ROCKALL 319 



59. DIAGRAM REPRESENTING THE KELATION BETWEEN DEPTH AND 



TEMPERATURE OFF ROCKALL 322 



CO. DIAGRAM REPRESENTING THE RELATION BETWEEN DEPTH AND 



TEMPERATURE IN THE ATLANTIC BASIN 322 



61. CURVES CONSTRUCTED FROM SERIAL AND BOTTOM TEMPERATURE 



SOUNDINGS IN THE ATLANTIC BASIN 324 



62. DIAGRAM REPRESENTING THE RELATION BETWEEN DEPTH AND 



TEMPERATURE, FROM THE TEMPERATURE OBSERVATIONS 



TAKEN BETWEEN CAPE FlNISTERRE AND CAPE ST. VlNCENT, 



AUGUST 1870 327 



3. " ElNE GROSSERE CYTODE VON BATHYBIUS MIT EINGEBETTETEN 



COCCOLITHEN " (x. 700) 412 



64. 'COCCOSPHERE' (x. 1000) 414 



65. ROSSELLA VELATA (sp. n.). Natural size. (No. 32, 1870) ... 419 



66. HYALONEMA LUSITANICUM, Barboza du Bocage. Half the natural 



size. (No. 90, 1869) 421 



67. ASKONEMA SETUBALENSE, Kent. One-eighth the natural size. 



(No. 25, 1870) ... 429 



8. FLABELLUM DISTINCTUM. Twice the natural size. (No. 28, 1870) 432 



69. THECOPSAMMIA SOCIALIS, Pourtales. Once and a half the natural 



size. (No. 57, 1869) 433 



70. PENTACRINUS ASTERIA, Linnaeus. One-fourth the natural size ... 436 



71. PENTACRINUS WVVILLE-THOMSONI, Jeffreys. Natural size. (No. 



17. 1870) 443 



