NARRATIVE OF THE CRUISE. 409 



II. 0'6827 gramme of the substance treated with hydrofluoric and sulphuric acids gave 

 0*0450 grm. potassium chloride (KG) and sodium chloride (NaCl), which gave 0'13G7 

 grm. potassium platinochloride (K 2 PtCl 6 ), equivalent to 0"0417 grm. potassium chloride 

 (KG), corresponding to - 02G34 grm. potassium oxide (K 2 0), and - 0033 grm. sodium 

 chloride (NaCl), corresponding to - 00175 grm. sodium oxide (Na 2 0). 



III. 0'3205 gramme of the substance treated with hydrofluoric and sulphuric acids 

 required for oxidation, 0*85 c.c. permanganate of potassium corresponding to - 0049G 

 grm. ferrous oxide (FeO) [1 c.c. permanganate of potassium — 0"0058355 grm. of ferrous 

 oxide (FeO)]. 



The two soundings in 2600 fathoms contained respectively 7 and 19 per cent, of 

 carbonate of lime. In 1975 fathoms there was 77 per cent., in 1100 fathoms 84 per cent., 

 and in 275 fathoms 88 per cent. The carbonate of lime in all these consisted essentially 

 of the shells of pelagic Foraminifera, with Coccoliths, Coccospheres, and Ehabdoliths. It 

 will be noticed that the amount of lime was less the greater the depth from which the 

 deposits came, and this was due to the gradual removal of the more delicate and smaller 

 shells. While these small shells and Coccospheres made up most of the deposit at 275 and 

 400 fathoms, they were very rare at a depth of 2600 fathoms ; these organisms appeared to 

 be quite as abundant at the surface over the one locality as the Other. The mineral 

 particles were very minute in these soundings, and consisted chiefly of felspars and 

 glassy fragments. As the. entrance of Cook Strait was approached, the mineral particles 

 derived from the coast of New Zealand increased both in number and size, and the pelagic 

 shells diminished, while glauconite, which was absent in the soundings from the middle of 

 the section, again made its appearance. 



The dredgings along the Australian coast were very successful, and yielded a large 

 number of specimens belonging to characteristic species. In 950 fathoms there were two 

 specimens of Lcetmogone violacea, Theel, one of the Elasipodous Holothurians. The only 

 other known specimens of this species were subsequently obtained by Mr. Murray at a 

 depth of 555 fathoms in the Fseroe Channel, when over three hundred specimens were 

 taken in one haul. 1 Dr. Theel says "it is impossible to discover any characteristic by which 

 these almost antipodal specimens may be distinguished from each other." From 2600 

 fathoms several Polyzoa, a siliceous Sponge, and some worm tubes were obtained. 



The surface nets were continually in use, and the naturalists on several occasions went 

 out in boats to observe the surface life. Pulvinulina micheliniana w r as more abundant 

 than had been previously observed, the best hauls being got when the net was dragged 

 as nearly as possible at 80 fathoms. In the majority of the specimens the brownish- 

 yellow sarcode enveloped the shell, and on two occasions the sarcode was observed 

 thrown out in bubble-like expansions, apparently serving the' purpose of a float, 

 similar to what was afterwards observed in Hastigerina. Coccospheres were especially 



1 rroc. Roy. Soc. Edin., vol. xi. p. U94, 1882, 



