On the Anatomy o/Hjpsobia nosophora. 401 



Two montiis later Mr. Hill sent a further consignment. 

 Geinmules were now found, and the sponge was at once 

 recoonized as Ephydatla kakahuensis, Traxler (Termes. 

 Fiizetek. 1896, xix. p. 102, pi. ii.). The sponge described 

 by TraxUr came from the River Kakahu in the South Island. 



Epht/datia kakahuensis, Traxler. 

 a-f, specimens ^ natural size : a, b, c, conical, with one large oscule ; 

 d, lamellar ; e, thinly encrusting- ; f, irregular ; g, spined toruote 

 oxeas, X 280 ; h., exceptional shape, viz. ampliityle, x '2SQ. 



Accordingly, New Zealand continues to have only one 

 known species of freshwater sponge, this being found both in 

 ihe North and South Island. 



It is to be hoped that Mr. Hill, who intends to dredge in 

 Lake Taupo, will add to the number of species. 



XXXIX. — On the Anatomy and Affinities of 

 Hypsobia nosophora. i^y G. C. Robson, B.A. 



(Published by permission of the Trustees of the British Museum.) 



Introduction. 



In 1915 Leiper and Atkinson (6), in extending and con- 

 firming Miyairi's original conclusions with regard to the 

 transmission of Asiatic Schistosomiasis ( = Bilharziasis), 

 Ann. (k Mag. N. Hist. Ser. 9. Vol viii. 20 



