24 



On some South Australian Polyzoa. 



Ey P. H. MacGillivray, M.A., M.R.C.S., F.L.S., Corr. Memb. 

 [Read June 7, 1889.] 



Plate II. 



The present paper contains a list of Soutli Australian Polyzoa, 

 which I have recently had occasion to examine. They were 

 mostly contained in a parcel sent for identification from the 

 Adelaide Museum, but include also some given to me by the 

 Rev. Dr. Porter. The total number of species is 6-4-, of which 

 four are now described for the lirst time. It is hoped that this 

 very imperfect list may serve as a nucleus to which 8outh Aus- 

 tralian naturalists will add many of the other species which un- 

 doubtedly occur on their coasts. 



The Australian seas are peculiarly rich in Polyzoa, from Vic- 

 toria alone upwards of 360 species having already beeii recorded. 

 Most of these have been obtained in the neighbourhood of Port 

 Phillip Heads, where, mainly owing to the skill and indefatigable 

 industry of Mr. J. Bracebridge Wilson, a more extensive series 

 has been found than is known to occur in any equal extent of 

 sea elsewhere. There is every reason to believe that parts of the 

 South Australian coas-ts, notably the Backstairs Passage, when 

 systematically explored, will yield an equally rich harvest. 



CLASS POLYZOA. 



Order I. — Piiylactol^mata, Allmaii. 



Suborder I. — Lopiiopea, AJIman. 



FAMILY PLUMATELLTD.^. 

 Plumatella, Lamk. 

 P. A2)Unii, McG. Torrens River. 



Order II. — Gymnol^mata, AUman. 

 Suborder I. — Ciieilostomata, Busk. 



FAMILY AETEID.q^. 

 Aetea, Lamx. 

 A. anguina, Linn., sp. Encounter Bay. 

 A. recta, Hincks. Glenelg. 



