In section C the slope of the plateau continues gradual to a depth of 30 fathoms, and in this respect is similar to the Macclesfield Bank. The Macclesfield Bank (Pl. XIV.) is situated 300 miles to the north of the Tizard ; it is 76 miles in length and 36 broad. — This bank is entirely submerged; the shallowest portion of the rim is 9 fathoms beneath the surface, and inside the bank the depth is from 40 to 50 fathoms.… It will be seen from the subjoined tabular list that 129 species of Madrepore corals (Hydrocorallines and Alcyonarians are not here included) have been determined from the Tizard and Macclesfield Banks; of this number 99 species are from the Tizard and 26 from the Macclesfield Bank, whilst 4 only are common to both.