CHAP. III.] BAHIA TO THE CAVE. 169 



masses with calcareous and horny bryozoa. There were a few 

 star -fishes, and a very few molhisca. The whole assemblage 

 resembled a good deal the produce of a haul in shallow water 

 off the Mediterranean coast of Morocco. 



On the following day we crossed over, sounding and dredg- 

 ing on our way, to within a mile and a half of the west shore 

 of the island of Tristan. A haul in 1000 fathoms gave us, 

 somewhat to our surprise, some most typical samples of the 

 common Echinus Flemingii, along wnth Ophioinusiu7n Lymani 

 and Rhizocrinus. We dredged a second time as we were near- 

 ing Tristan in 550 fathoms, and took one or two specimens of 

 a species of Antedon, some corals the same as those off Night- 

 ingale Island, and a quantity of bryozoa. In the evening we 

 set all plain sail, and, with a favoring breeze from the north- 

 west, proceeded on our voyage toward the Cape. 



On the 20th of October we sounded in 2100 fathoms, on hard 

 ground, with a bottom temperature of 1°*1 C, and put the 

 dredge over. The dredge got entangled at the bottom, and 

 was disengaged with some difficulty. It came up in the even- 

 ing quite empty, and we made all 'plain sail and proceeded on 

 our way. 



On the 21st the weather changed, the wind dropping round 

 to the S.S.E., and blowing very cold with force = 8. We ran 

 on under double-reefed topsails, and during that day and the 

 next made nearly 350 miles. 



On the 23d we put the dredge over early, and veered to 3000 

 fathoms ; and after breakfast we sounded in 2550 fathoms, with 

 a bottom of reddish clay and a bottom temperature of 0°-7 C, 

 the position of the sounding being lat. 35° 59' S., long. 1° 25' 

 E. The dredge contained little save some scarlet caridid and 

 peneid shrimps; but two small star -fishes gave evidence that 

 it had reached the bottom. 



On the 25th we sounded in 2650 fathoms, with a bottom of 

 reddish clay, and a bottom temperature of 1°"0 C. ; and on the 

 IL— 12 



