THE RE8ULT.S of DEEP SEA. INVESTIGATION in the 

 TASMAN SEA. 



IL— THE EXPEDITION of the " WOY WOY." 



2. MOLLUSCA FROM ElOHT HuXDRED FaTHOMS, ThIRTY-FIVE 



Miles East of Sydney. 



By Charles Heuley. 



(Plates Ixvi.-lxvii.). 



In continuation of the biological examination (jf the ocean 

 floor off Sydney conducted by Professor W. A. Haswell with the 

 aid of a grant from the Royal Society of London (as detailed ante 

 p. 271) an excursion was made in the " Woy Woy," on October 

 26-27, 1906. We proceeded thirty-five miles from the coast, and 

 lowered the bucket dredge in an estimated depth of 800 fathoms. 

 It returned nearly full of green ooze. ^ When the whole load was 

 washed through a sieve of thirty-four to the inch, liardly more than 

 a cupful was retained of shells, foraminifera, or such solid bodies. 

 The only thing alive was a Tubicolous Annelid. From shallower 

 depths of about a hundred fathoms, ten times as much matter 

 would be left in the sieves. So large a proportion of silt to shells 

 seems to indicate that deposition is here proceeding rapidly. I 

 should also have inferred tliat the deposit of such finely divided 

 matter implied a perfect calm, but my friend Mr. G. H. Halligan 

 who has given these problems special attention, does not consider 

 such a deduction necessary. 



On the other hand the fiagella of the antennae in an undeter- 

 mined prawn from this horizon extended for more than three and 

 a half times the length of its body. Mr. A. R. McCulloch 

 suggests that this enormous dcvelopement would be manageable 

 only in absolutely still water. 



Both species and individuals were less abundant than in the 

 samples of sea bottom previously examined. About sixty different 

 kinds of shells were separated, about a third of which are new. 

 From these the following are selected for description. 



1 For an account of our glauconite deposits, see Collet and Lee — Proc. Roy. 

 Soc. Edinb., xxvi., 1906, p. 273, 



