344 THE PROCEEDINGS OF THE LINNEAN SOCIETY nearly vertically truncated, flat ; A. system small, covered by plates, decreasing uniformly towards opening. Lateral fasciole running obliquely to ambitus from the middle of the anterior ambulacra towards posterior extremity ; posterior extremity of actinal plastron lost in rounded posterior edge of test ; tuber-culatum within peripetalous fasciole coarse, closely packed in all the I spaces, except the odd one. Long. 65 ; lat. 57 ; alt. 36 millim. Habitat, East Australian coast, generally both within and outside tropics. I have seen a well authenticated specimen from Port Jackson. Salmacis bicolor, Agassiz. In the list of the Echini of Australia, at p. 161, there is a description of the genus Salmacis. At the head of the page the name of Salmacis bicolor has been omitted, to which the subsequent description, beginning at the first line, refers. The Fishes of Port Darwin. By William Macleay, F.L.S. The collection of Fishes made for me at Port Darwin by Mr. Spalding during the last six months numbers about 120 species. It is interesting not only as regards the new species — 21 in number — which it contains, and the many additions which it makes to the Australian Fauna of other previously known species, but also in the light which it throws on the geographical distri-bution of the Fishes of the Indian and Pacific Oceans. Almost all the species mentioned by Sir John Richardson as having been received from Port Essington nearly 40 years ago, seem to be found also at Port Darwin, and it is evident that the affinity of the Fish Fauna of North-Western Australia is much more to that of the Dutch East Indian Archipelago than to that of Torres Straits and North-Eastern Australia, which partake more of the
BioStor
