302 
THE VOYAGE OF H.M.S. CHALLENGER. 
Station 92. 
Orcaxukb from 
THE Sl'RKACR. 
Stations 93 r* 
93c. 
OkGANIaMM FROM 
THE DEPOSIT. 
The Station-book records also : — A soft Holothurian, and a small Sternoptycliid fish 
evidently from the surface. 
Moseley writes : “ In the swabs was a Holothurian with gelatinous test, resembling 
that of Sal pa in appearance, and with curious simple-spoked wheels in the epidermis.” 
Surface Organisms. — A Hying fish ( Exocoetus nigricans) came on board, but not many 
have been seen lately. 
Station 93 to 93c (Sounding 157 to 160), off Cape Verde Islands (see Chart 11). 
July 27, 1873. 
Temperature of air at noon, 75°‘8 ; mean for the day, 75 0- 7. 
Temperature of water at surface, 75°'0. 
At 6.30 a.m. got up steam, and at 9 a.m. proceeded under steam to sound. At 
9.30 a.m. sounded in 1070 fathoms, deposit Volcanic Mud, containing 8 - 29 per cent, 
of carbonate of lime (Station 93). At 10.30 a.m. completed sounding, stopped engines, 
and made all plain sail. At 11.45 a.m. got up steam, and at 12.15 p.m. sounded 
in 1000 fathoms, deposit Volcanic Mud, containing 13 ’65 per cent, of carbonate of 
lime (Station 93a). At 2 p.m. stopped and sounded in 465 fathoms, deposit Volcanic 
Mud, containing 13 63 per cent, of carbonate of lime, bottom temperature 43° - 5 
(Station 93b). At 3 p.m. stopped and sounded in 52 fathoms, deposit Coralline Sand, 
containing 94 20 per cent, of carbonate of lime (Station 93c). At 3.15 p.m. proceeded, 
at 4 p.m. passed Bird Island, and at 4.15 p.m. stopped and anchored in 7 fathoms. The 
four soundings taken to-day are in a line from the middle of the entrance of the channel 
l»etween San Antonio and St. Vincent Islands, up to near Bird Island at the entrance 
to Porto Grande. 
DiAToMACEJi. — The following species of Diatoms were observed by Mr. Comber in the 
dc]>osit from Station 93a, 1000 fathoms : — 
Amphora jrrotcu*, Gregory. 
„ jrvndlrri, A. Schmidt. 
„ rrcuta, Gregory. 
NaaittUa hmncdyv, W. Smith. 
„ darata, Gregory. 
„ lyra, Khrenberg. 
„ jrrmtrrta, Khrenberg, and var. 
„ I/Hllat4 y Norman. 
„ dirreta, Kalfs. 
„ marginata, Lewis. 
„ tmtthii, llrebiason. 
Navicula fugca, Ralfs. 
„ didyma, Kutzing. 
„ interrupta , Kutzing. 
„ multicostata, Grunow. 
„ incur vat a, Gregory. 
„ bomhoides , A. Schmidt. 
„ cincta, Kutzing. 
„ aepera, Khrenberg. 
Pleiirnniyma directum, Grunow. 
Cocconei* psendomarginata, Gregory. 
Ni/zxrhia marina, Grunow. 
