SUMMARY OF RESULTS. 
735 
organisms indicative of oceanic conditions increased in number. The sea was covered in 
many places by long broad lines and patches of Oseillatoriaeese ( Ti ich od esmmm '? ) , which 
evidently did not extend much below the surface, not being taken by the tow-net when 
dragged under the surface. There was a smell from the patches as from a weedy pond. 
The patches were of a brown or reddish colour, and the threads in some species were 
arranged in bundles and in other species in round patches. Oscillatoriacere had not 
previously been met with in such abundance. A few specimens of Pyrocy.stis, many 
specimens of Peridinium, and a very elegant organism like it, were also present, and in 
addition the following were observed : — Acanthometra, Diphyes, Rhizostoma, and other 
jelly-fishes, larvae of Chirodota, Sagitta, larval Annelid with tube, Copepods, Lucifer, Zoeae, 
and other Crustacea, larval Gasteropods, Atlanta, Styliola, Ileterofusus [ ==. Limacina ], 
Theceurybia [ = Ilolopsyche] gaudichaudi , larval Pteropods, Sad/pa, Appendicularia, 
and fishes. Sharks, dolphins with pointed noses, porpoises, and a turtle were seen 
alongside the ship. The porpoises w r ere in great abundance about the ship on 
September 13 : they had a high falcate back fin placed about the middle of the body, 
blunt snout, and black colour, the belly not being conspicuously lighter in colour. The 
animals frequently swam in pairs close beside one another. A frigate bird w r as seen 
hovering over a shoal of the porpoises, apparently trying to pick up disabled fish. 
The surface animals of the Arafura Sea are very slightly pelagic in their characters, 
being more like those of some bay or harbour. It may be noted that one living Rotalia 
was taken in the tow-net, but not a single specimen of Globigerina, Orbulina, 
Pulvinulina , or other pelagic Foraminifera was taken in the tow-nets while crossing the 
Arafura Sea, although these were never absent from the nets in the open ocean. 
The Challenger remained at the Arrou Islands from September 14 till September 23, 
1874 (for description of the islands see Narr. Chall. Exp., vol. i. pp. 545-552). The 
following species are recorded in the Zoological Reports as having been obtained in 
shallow water and on shore at the Arrou Islands : — 
Crinoidea (Carpenter, Zool. pt. 60). 
Antedon variipinna, Carpenter. Two specimens ; obtained also at Station 186. 
Actinometra paucicirra, Bell. Three specimens: obtained also at Station 187 and 
Cape York. 
Entozoa (Linstow, Zool. pt. 71). 
Filaria fabellata, n.sp. Several specimens (parasitic m Paradisect apodal). 
„ paradises, n.sp. One specimen (parasitic in Paradisea apoda ). 
Annelida (MTntosh, Zool. pt. 34). 
Glycerg sagittarise, n.sp. One specimen ; obtained at no other locality. 
Arafura Sr a. 
At Arrou 
Islands. 
Animals from 
Arrou Islands. 
