results, not only in sponges, but in many other branches of marine 

 zoology, and great credit is due to Dr. Ramsay for his efforts in. 

 this direction, the material collected by him having provided a rich 

 field of investigation to Dr. Lendenfeld. 



The Alcyonarian corals, embracing the Gorgoniasand Pennatulas 

 are fairly represented, 29 species being enumerated. What little 

 has been done in this order is however very scattered and frag- 

 mentary, and the descriptions are imperfect in most instances 

 thereby rendering identification very difficult. The same remarks 

 apply to the Actinida;, so far I have only seen the descriptions 

 ■of four species, and great difficulty was met with in dealing with 



some 20 species readily obtainable. 



The corals have been mostly worked out by the late Rev. J. E. 

 Tenison- Woods, and considering our geographical position, muster 

 very fairly with 13 species, which will, no doubt, be largely added 



I quinaria may be 



Dr. Lendenfeld in publications issued by the Australia 

 and there is still room for more workers in this very interesting 

 group. During 1886 1 devoted a few weeks to collecting Hydroids 

 with highly satisfactory results; amongst those collected were 12 

 new species besides some additions to the known fauna. Quite 

 recently, I found about seven species new to our coast, and six or 

 seven new to science ; this shows that in a field, comparatively 

 speaking well worked, there is still a vast amount of investigation 



The Siphonophora, including the Velella and Portuguese Men 

 of War are represented by seven species ; the Scyphomedusie, to 

 which order the Jelly-fish belong, by seven species and the Cteno- 

 phora, by two species. 



The Crinoidea or feather stars are not very numerous five 

 species only being known from Port Jackson, two of which are 

 common. The Ophiuroidea are well represented by 35 species, 

 many of them being fairly common under stones in various parts 

 of the harbour. 



The Asteroidea number 30 species, and amongst them are many 

 very interesting forms, one in particular being remarkable, m that 

 it inhabits the zone between high and low water mark, and is 



exceptional phase in the development of the young, for the eggs 

 are deposited under stones in little rock pools and the young when 

 hatched out never leave the spot until they assume the adult form, 



