STUDIES ON THE OOMPAEATIVE ANATOMY OP SPONGES. 35 



Teichonella prolifera .... Leuconidse. 

 Eilhardia Schulzei .... Leuconidse. 

 Grantia labyrinthica ." . . . Syconidse. 



It would not have been necessary to deal witli this question 

 so carefully had not Polejaeff's emended family Teichonidse 

 met with such general and unquestioning acceptance. Thus 

 Vosmaer adopts it in his most important work (20), and Len- 

 denfeld (6) gives it a place in his system and in the inevitable 

 genealogical tree. Haeckel also accepts the family in his 

 latest work on sponges (12). 



In conclusion I wish again to record my great indebtedness 

 to Professor Howes for his kindness in correcting the proofs 

 of this paper in my absence from England. 



List of Memoirs referred to. 



1. Carter, H. J. — " Descriptions of Sponges from the Neighbourhood of 



Port Phillip Heads, South Australia," ' Ann. and Mag. Nat. Hist.,' 

 1886, et seq. 



2. Dendt, Arthur. — " Studies on the Comparative Anatomy of Sponges. 



II. — On the Anatomy and Histology of Stelospongos flabelli- 

 formis, Carter; with Notes on the Development," ' Quart. Journ. 

 Micr. Sci.,' December, 1888. 



3. Carter, H. J. — " On Teichouia, a New Family of Calcareous Sponges, 



with Descriptions of Two Species," ' Ann. and Mag. Nat. Hist.,' 

 1878. 



4. Carter, H. J. — "Mode of Circulation in the Spongida," 'Ann. and 



Mag. Nat. Hist.,' 1885. 



5. Carter, H. J. — " On the Position of the AmpuUaceous Sac and the 



Function of the Water Canal System in the Spongida," ' Ann. and 

 Mag. Nat. Hist.,' 1887. 



6. Lendenfeld, R. von. — ' A Monograph of the Horny Sponges,' Royal 



Society of London, 1889. 



7. Haeckel, Ernst. — ' Die Kalkschwamme.' 



8. PoLEJAEFF, N. — ' Report on the Calcarea collected by H.M.S. " Chal- 



lenger" during the Years 1873—1876.' 



9. SoLLAs, W. J. — " Sponges," ' Encyclopaedia Britannica,' ed, ix, 



