1156 
THE VOYAGE OF H.M.S. CHALLENGER. 
Statiosh 309 
and 309a. 
Oroa.visms from 
S iRFACR-Nm*. 
Station 310. 
.\mmuai from 
Tkawi. 
Surface Organisms. — The tow-nets on this date procured more pelagic forms than in 
Messier Channel, and in Puerto Bueno on January 9 there were many specimens of 
Perulinium, Infusoria, ^ledusce, Copepods, many young mussels (?), Membranipora 
larvas, Appendiciilaria. 
Station 310 (Sounding 459), Gulf of Penas to Sandy Point through Magellan 
Strait (see Chart 41). 
.lanuary 10, 1876 ; lat. 5T 27' 30" S., long. 74° 3' W. 
Temperature of air at noon, 48°'8 ; mean for the day, 48°'5. 
Temperature of water at surface, 50°'5 ; bottom, 46°‘5. 
Density at 60° F. : — 
Surface, . . . L01910 I 200 fathoms, . . . L02458 
25 fathoms, . . . L02315 I Bottom, . ^ . . L02451 
Depth, 400 fathoms ; deposit. Blue Mud, containing only a trace of carbonate of 
lime (see Murray and Renard, Deep-Sea Deposits Chall. Exp.). 
At 3.30 A.M. got up steam. At 4.50 a.m. weighed anchor and proceeded out of 
Puerto Bueno, steaming through the Sarmiento Channel. At 8.30 a.m. stopped and 
sounded in 400 fathom.s. Put over trawl, which came up at 10.45 a.m. containing many 
specimens. The carbonic acid was determined in water from 200 fathoms, and amounted 
to 70 '8 milligrammes per litre. At 4.40 p.m. anchored in Innocentes Bay in 25 fathoms. 
Exploring parties went on shore. 
The following species are recorded in the Zoological Reports from the trawl at this 
Station : — 
Hexactinellida (Schulze, Zool. pt. 53). 
AccuUkriscus (luhius, n.g., n.sp. One specimen ; obtained at no other locality. 
lihubdocalyj/tus rapei'i, n.g., n.sp. Two specimens ; obtained at no other locality. 
Alctonaria (Wright and Studer, Zool. pt. 64). 
TlioitarcUa kbUikeri, n.sp. One specimen ; obtained also at Station 308. 
Paramuricea laxa, n.sp. Many specimens; obtained at no other locality. 
ClemnlutM rolnutta, n.g., n.sp. Many specimens; obtained at no other locality. 
lyeptoyorr/ia puri/urea (Pallas). One specimen; obtained also at Bahia. 
