XXV.—Further observations on deep soundings obtained by H.M.S. "Herald," Capt. Denham, R.N., F.R.S., employed on surveying service in the South-western Pacific; with an account of the examination of the alimentary matter of the Salpæ as bearing on the nature of the materials composing the sea-bottom

John Denis Macdonald
1857 Annals and Magazine of Natural History  
doi:10.1080/00222935709487917 fatcat:vh4u3oqwyzb37m5zoaw2ht7tcu