894 
THE VOYAGE OF H.M.S. CHALLENGER. 
Statu>n 231. Density at 60° F.: — 
Surface, . 
. 1 02541 
200 fathoms, . 
. 1-02546 
25 fathoms, 
. 1-02566 
300 
. 1-02544 
50 „ . . 
. 1-02562 
400 „ 
. 1-02549 
100 „ . . 
. 1-02650 
Bottom, 
. 1-02579 
Depth, 2250 fathoms ; deposit, Blue Mud, containing only a trace of carbonate of 
lime (see Murray and Renard, Deep-Sea Deposits Chall. Exp.). 
At 4 A.M. got up steam. At 5.30 a.m. shortened and furled sails. At 6 a.m. 
proceeded under steam, and at 6.15 a.m. sounded in 2250 fathoms. At 8 a.m. obtained 
serial temperatures down to 1500 fathoms. At 11.30 a.m. completed observations, and 
made all plain sail. Black and white albatrosses were seen. 
Distance at noon from Redfield Rocks, 189 miles. Made, good 70 miles. Amount 
of current 7 miles, direction S. 
Orgasi.sms from Radiolaria (Haeckel, Zool. pt. 40). — The following species of Radiolaria were 
TUB KPasiT. observed in the deposit from this Station : — 
Di^ephanus corona, Haeckel. 
Aulograpliis tatimorpha, Haeckel. 
„ furcula, Haeckel. 
AuloKpathis diodon, Haeckel. 
Challengeria sigmodon, Haeckel. 
Challengeria harstoni, Murray. 
„ murrayi, Haeckel. 
Challengeron channeri, Murray. 
„ ciliatum, Haeckel. 
Haeckeliana goetheana, Haeckel 
Orgamsms from 
SCRFACK-NB re. 
Surface Orga ni s m s.— The following species are recorded from the surface at this 
Station : — 
Radiolaria (Haeckel, Zool. pt. 40). 
Staurotholus j^olystylufi, Haeckel. 
Staurotfioloniumoctodoratium, Haeckel. 
Sf'thoconus trochus, Haeckel. 
Theocampe cryptoprora, Haeckel. 
Auloceros furcomus, Haeckel. 
Sagoplegma pyramid ophora, Haeckel. 
Aulosphsera tmodon, Haeckel. 
Auloscena tentorium, Haeckel. 
Auloplegma spongiosum, Haeckel. 
Medusetta quadrigata, Haeckel. 
Castanissa croshiei, Haeckel. 
In addition, the following arc recorded in the note-books (April 9, 10) : — Diatoms, 
Xoctiluca, Pyrocystis (two varieties), J^emdinium (two species) m catena, Acineta (on 
tails of Copepod.s), Glohigcrina, Orhulina, Ilastixgerina, Pulvinulina, Challengeridae 
(from tow-net sent down to 1000 fathoms). Medusa), Dijihyids, Velella, Ctenophora), 
small Ophiurid (from net sent down to 1000 hithoms), Sagitta, Tomopteris-Wke Annelid, 
.Annelid and IMnnarian larv’a), Cythere, Cypridina (several species), Saphirina and other 
<Jo])cpo<ls, Rhahdosoma, Phronima, Plwmimclla, Anchylomera, Hyperids, Oxycephalus, 
