132 ADDENDUM TO INTRODUCTION. 



ber 26th) it was not deemed wise to trust the trap overboard 

 outside the Bay. Having a small Otter Trawl aboard, this was 

 dragged for a short time in the Bay, but the only fishes 

 netted were Trygonoptera testacea and Lejndotrigla fleuracanthica. 

 A seine net hauled fronj the shore produced Sand Whiting 

 (Sillago ciliata), White Trevally {Garanx georgianus), Black 

 Bream {Ghrysophrys australis), and Mullet [Mugil dohula). 



I put a tow-net overboard and secured some pelagic organisms. 



Shoals of Mackerel {Scomber fneumatopliorus) were swimming 

 around the " Thetis " as she lay at anchor, and numbers were 

 caught by line in company with Yellow-tails {Trachuras declivis). 

 After breakfast we steamed outside and hand-iished the ground 

 between Jervis Bay and Wreck Bay. The following fishes were 

 obtained : — 



Gummy {Galeus antarcticus). 

 Fiddler [Trygonorhina fasciata). 

 Sergeant Baker {Aidopus pu7'pu7'issatus). 

 Nannygai (Beryx affimis). 

 Schnapper (Sjjarosomus atiratus). 

 Sweep {Ccesiosoma cequipinnis) . 

 Teragiin [Atractoscio7i atelodus). 

 Morwong {Dactylosparus carponemus). 

 Maori (Opthalmolepus lineata). 

 Pig Fish {Lepidaplois oxycephalus). 

 Leather Jacket {Monacanthus ayraudi). 

 Red Rock Cod [Scorpcsna cruenta). 

 Common Flathead {Platycephalus fuscus). 

 Bass Flathead (Platycephalus basscmsis). 

 Flying Gurnard {Pterygotrigia polyommata). 

 Short-finned Pike {Sphyrcena novce-hollandioi) . 



Returning at dusk to Jervis Ba}^, the electric fish-trap was 

 later put over in nine fathoms and the lights kept going brilliantly 

 for an hour and a quarter. The area for fully a hundred yards 

 around was well illuminated and Garfishes {Hemirhamphus inter- 

 medins) could be seen swimming in and out through the wire 

 meshes. When the trap was hauled out of the water it was 

 empty. 



It is most likely that the illumination was altogether too 

 brilliant, so that instead of attracting the fish it scared them 

 away. In future experiments it might lie well to copy natural 

 illuminants of the water and provide a number of faintly glowing 

 lamps rather than few of excessive brilliancy. 



I lowered an incandescent lamp in a tow-net and obtained a 

 number of small Invertebrates, thus reproducing the experiments 

 conducted at the Liverp(.)ol Biological Station. 



