'21 



CONTRIBUTION TO OUR KNOWLEDGE OF AUSTRA- 

 LIAN HIRUDINEA. Part iv. 



With a Note on a Parasitic Ehtoproctous Polyzoon. 



By E. J. Goddard, B.A., B.Sc, Linnean Macleay Fellow of 

 the Society in Zoology. 



(Plates Ivi.-lviii.) 



Pontobdella macrothela Schmarda(1861). (Plate Ivi.) 



For a specimen of this species, I am indebted to Mr. Ogilby, 

 Naturalist to the Amateur Fishermen's Association, Brisbane, 

 who obtained it in the Brisbane River. This constitutes the first 

 record of the species, I think, in Australian waters. The speci- 

 men resembles exactly that described by Schmarda from King- 

 ston, Jamaica. I have taken the opportunity of re-examining 

 the species externally, as I am not aware that it has been done 

 since Schmarda's observations on it were made, especially as it is 

 of some interest in regard to metamerism. 



The measurements in the specimen preserved in alcohol were — 

 length, 80 mm.; breadth, 10 mm.; depth, 5 mm. 



Body. — Colouration a light yellow-brown; no traces of any 

 other pigment in the form of stripes or dots. 



The surface is exceedingly rough, owing to its being cut up 

 into a number of tubercular areas, those on the middle annulus 

 of each somite being enormously developed, and probably of 

 greater importance, as regards size, than in any other member of 

 the Hirudinea. 

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