466 Prof. Wyville Thomson on some of the Results of 



a few things occurred, usually in a very fragmentary condition. The 

 following Table gives an idea of the proportion in which the principal 

 groups were represented : — 





■Jo 



I§ 



• rt to 





•Jo 



o * ,H 



•rt o 



Pisces 



Cephalopoda. 



Gasteropoda 



Lamellibranchiata 



* 

 # 



* 



* 



* 

 * 

 * 



* 



* 

 * 

 * 



* 

 * 

 * 



* 

 # 



* 



* 



* 



* 



* 



* 



* 

 * 

 * 



* 

 * 



* 



* 



* 





Pycnogonidse. 



Decapoda 



Scliizopoda. 



Stomatopoda. 



Edriophthalniata. 



Phyllopoda. 



Ostracoda. 



Copepoda. 



Cirripedia. 



Gephyrea. 



Bryozoa 



Holothuridea 



Echinoidea 



Ophiuridea 



Asteridea 



Crinoidea. 

 Hydromedusse. 



Zoantharia 



Alcyonaria 



Porifera 



Rhizopoda 



We took advantage of a week's stay at Tahiti to sound out the slope 

 of this coral reef, and to determine the bathymetrical distribution of the 

 species of reef -building corals. This investigation, which is not yet fully 

 worked out, will form the subject of a separate report. 



"We left the harbour of Papeete on the 3rd of October, and proceeded 

 southwards, expecting to pick up the westerly winds about lat. 40° S. 

 "We sighted the island of Tubuai on the 7th ; and as we fell in with a 

 succession of southerly instead of easterly winds, we were able to cut 

 off a corner, and we reached the parallel of 40° in long. 132° 58' "W. 

 Prom that point we ran along a little to the south of the parallel of 40°, 

 encountering no regular westerly winds, but rather heavy weather from 

 the south and north and calms, as far as long. 84° 39' ~W\, when we 

 altered our course for the island of Juan Pernandez, steaming most of 

 the time against foul winds from the north and north-east. "We reached 



