ON SOME HEXACTINI^ FROBI NEW SOUTH WALES. 



3^ 



On some Hexactini^ from New South Wales. By Leonora ,L Wilsmore, 

 M.Sc, Zoological Laboratory, [Jniversity College, London. (Commu- 

 nicated by Prof. J. P. Hill, D.Sc, F.L.S.) 



(Plates 4-6 and one Text-figure.) 



[Read 16tli February, 1911.] 



In this paper I continue a description o£ the Actiniaria brought from 

 Australia by Professor J. P. Hill, to whom I am indebted both for material 

 and for kindly advice and assistance. The classification employed is that 

 adopted by Haddon in "The Actiniaria of Torres Straits," (17) 1897. 

 In the present communication the following species are classed as new : — 



Hexactini^, Hertwig. 



Family Ilyanthid^, Grosse. 



Subfam. Halcampinse, Kwietn. 

 PeacJiia Jiilli, sp. n. 



, Family Sargartiid^. 



Subfam. P belli use, Yerr. 



Pliellia broioni, sp. n. 

 Pliellia capitata, sp. n. 



Peachia hilli. (PI. 4. figs. 1-8.) 



Form (PI. 4. figs. 1 & 2). — The two specimens I received differ very much 

 in size and outward appearance. The internal anatomy, however, shows 

 that they undoubtedly belong to the same species, tbe smaller form being- 

 larval. The body consists of three parts — capitulum, scapus, and physa. 

 There is no distinct division between the capitulum and scapus ; but the 

 physa is clearly defined, and in the adult appears as a small bud at the 

 posterior end of the scapus (PI. 4. fig. 1, 'f-)- I^ measures 1*5 mm. in 

 length, and shows none of the external grooves present in the physa of 

 Peachia liastata (7), but their absence may be due to contraction. The 

 peculiar form in which the posterior end of the scapus has contracted in 

 the adult has no reference to its internal anatomy (PL 4. fig. 1, s.). The 

 physa in the larval form is introverted, so that there appears to be a large 

 pore at the posterior end. This is evidently the " anus large and con- 

 spicuous "" of Peachia carnea, described by Professor Hutton (6) . The 

 entire surface is covered with minute projections, which are also cha- 

 racteristic of Peachia hastata. Professor Haddon (7) describes them as 



