606 
THE VOYAGE OF H.M.S. CHALLENGER. 
Station 169 . 
Animals from 
Trawl. 
Density at 60° F.: — 
Surface, .... 1-02636 200 fathoms, . . . 1 02573 
50 fathoms, . . . 1-02608 Bottom, . . . 1-02594 
100 . . . 1-02602 
Depth, 700 fathoms; deposit, Blue Mud, containing 4'36 per cent, of carbonate of 
lime (see Murray and Renard, Deep-Sea Deposits Chall. Exp.). 
* 
At 6.15 a.m. stopped and sounded in 700 fathoms. At 7.30 a.m. put trawl over. 
At 9 a.m. obtained serial temperatures at intervals of 100 fathoms down to the bottom, 
and specimens of water. The carbonic acid was determined in water from 50 fathoms, 
and amounted to 511 milligrammes per litre. At 11.30 a.m. hove up trawl, containing 
a quantity of mud and many specimens. At 11.45 a.m. stopped engines and made 
sail. Diomedea exulans , Diomedea melanophrys , Cape pigeons, prions, stormy petrels, 
and another petrel, noticed about the ship. 
Distance at uoon from Esperance Rock, 384 miles. Made good 86 miles. Amount 
of current 9 miles, direction N. 50° E. 
The following species are recorded in the Zoological Reports from the trawl at this 
Station : — 
Monaxonida. 
Cladorhiza pentacrini, Dendy, n.sp. [See Ann. and May. Nat. Ilist., ser. 5, 
vol. XX. pp. 279-282, 1887]. 
Pennatulida (Kolliker, Zool. pt. 2). 
Kophobelemnon sp. (?). One fragmentary specimen (resembling Kophobelemnon 
stelliferum, var. durum, Kolliker). 
Protocaulon molle, n.g., n.sp. One specimen ; obtained at no other locality. Only 
species of the genus. 
Leptoptilum yracile , n.g., n.sp. Several specimens ; obtained at no other locality. 
Only species of the genus. 
Hydroida (Allman, Zool. pt. 70). 
Cryptolaria gracilis , n.sp. Obtained at no other locality. 
Perisiphonia pectinata, n.g., n.sp. Obtained at no other locality. 
Crinoidea (Carpenter, Zool. pt. 60). 
Eudiocrinus semperi , n.g., n.sp. Two specimens ; obtained also at Station 164. 
Antedon altemata, n.sp. One specimen ; obtained also at Stations 170a, 218, and 
236, 630 to 1070 fathoms. 
