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 



