Vol. IX, Nos. 8-9.] Biological Work of the ‘‘ Investigator.’”’ 353 
[N.8.] 
of. Up to the present time four successful hauls have been 
made. Unfortunately the net in use at present is not a self- 
closing one, but it is hoped that in the near future this present 
apparatus will be replaced by one of a newer pattern. 
Sation 393. 
7° 21’ 6” N.; Depth of net—400 fathoms. 
85° 7 15” E. | Total sounding—2009 fathoms. 
Although great care was taken, it was found when the net 
was hauled on board that a large number of the specimens, 
especially the smaller fish and the larger crustacea, were some- 
what badly damaged, but the Copepoda were in excellent con- 
dition. 
The following specimens were identified :—- 
PISCEs. 
Cyclothone microdon (Gunther). 
Vinciguerria lucetia, (Garman). 
Examples of Cyclothone microdon (Giinther) were of com- 
mon occurrence: hitherto the ‘‘ Investigator’’ had obtained 
this species on only two occasions, at Stations 13 and 55. 
Further examples have since been obtained with the mid-water 
net at Stations 461, 462, and 463, so that it would appear to 
be a common inhabitant of the mid-water in the Bay of Bengal. 
A few examples of Cyclothone signata (Giinther) were also 
obtained. As has been shown by Murray and Hjort (1912, 
p. 103), this species occurs in great numbers in the middle of the 
North Atlantic at a depth of 500 metres (approx. 270 fathoms), 
whereas C. microdon occurs at a somewhat greater depth, 
about 1,000 fathoms. The depths at which mid-water trawls 
have been made on the “ Investigator ’’ up till the present 
time range from 375 to 475 fathoms, and it is probable that 
the examples of this latter species were caught during either the 
ascent or descent of the net: this would also account for the 
difference in the numbers obtained in the two species. 
A single example of Vinciguerri lucetia, Garman was also 
obtained at this station. This is, I believe, the first occasion 
on which this species has been recorded by the ‘‘ Investiga- 
tor’’: a second specimen was subsequently obtained at Station 
463. At Station 452 a small example of a Myctophum sp. was 
obtained, while at Station 463, examples of a young Argyreo- 
pelecus sp. and Astronesthes sp. were captured: as regards the 
latter, it is too immature to be diagnosed with certainty, but 
appears to be an immature example of A. indicus Brauer. 
Tunicara.—Three examples of a species of Pyrosoma were 
obtained, and specimens of two species of Salpa, S. hexagona. 
