. Bulletin of the British Museum (Natural History). NOMENCLATURE OF CRABS 5 investigation of its deeper abysses would be mere matter of curiosity and of detail' (Thomson, 1873, p. 93). After calling at Queenstown to coal and to pick up Carpenter's son, P. H. Carpenter, the Porcupine sailed once more on 19 July and proceeded in a roughly south-westerly direction, dredging at relatively shallow depths as she crossed the Great Sole Bank and the unsuspected very rough topography of the upper parts of King Arthur Canyon to the south of the Goban Spur. Finally, on 22 and 23 July two successful dredg
. Bulletin of the British Museum (Natural History). NOMENCLATURE OF CRABS 5 investigation of its deeper abysses would be mere matter of curiosity and of detail' (Thomson, 1873, p. 93). After calling at Queenstown to coal and to pick up Carpenter's son, P. H. Carpenter, the Porcupine sailed once more on 19 July and proceeded in a roughly south-westerly direction, dredging at relatively shallow depths as she crossed the Great Sole Bank and the unsuspected very rough topography of the upper parts of King Arthur Canyon to the south of the Goban Spur. Finally, on 22 and 23 July two successful dredge hauls were obtained on the abyssal plain south of the Pendragon Escarpment at 2435 and 2090 fathoms respectively (stations 37 and 38), depths which were not to be exceeded until February 1874 as Challenger saiicd from the Canaries towards the Antilles. The Porcupine now steamed northwards once more, towards the southwestern tip of Ireland, taking a series of four dredge samples on the Goban spur (Stations 39^2) and three (43^5) on the eastern flank of the Porcupine Seabight. After coaling at Haulbowline on 2 August the vessel reached Belfast on Wednesday 4. On August 7 Thomson summarised the results of the cruise in a letter to A. M. Norman (see Mills. 1980) which was presented at the annual meeting of the British Association in Exeter and published in the Annual Report (Rep. Brit. Ass. 1869(1870): 115). That Norman should work on the crustaceans collected was already decided, for Thomson ends his letter T trust to your contributing the Crustacea, which will be sent to you as soon as possible.' 10' 5' 0". Fig. 4 Track of the third cruise of HMS Porcupine in 1S69. Redrawn from Thomson, 1873, plate IV. Having been joined by W. B. Carpenter, and having had her boilers cleaned out, the Porcupine sailed from Belfast on August 11, making for Stornoway from where she was to begin the third and final cruise of 1869 to extend the work of the Lightning the previous year (Fi
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