)28 



A MONOGRAPH OF THE AUSTRALIAN SPONGES, 



when single and isolated, presenting a stelliform ax-rangement of 

 the superficial branches of the exhalent canal system, but when on 

 the margin, running in straight lines towards the latter. Pores in 

 the interstices of a soft fibrous reticulation i?i the dermal tissue which 

 tympanizes the interstices of the subdermal fibrous reticulation. 



Canal System 1 



Skeleton. 

 Internal structure composed of fine keratine fibre, densely 

 reticulated ; traversed plentifully by the branches of the exhalent 

 canal system. 



Geographical Distribution. 

 East Coast of Australia, (T. Jukes.) 



Bathymetrical Distribution 1 



73. SPECIES. EUSPONGIA OFFICINALIS. F. E. Schiilze. 

 Ditela nitens. 0. Schmidt. (1) 

 Euspongia officinalis. Graeffe. (2) 

 Euspongia officinalis. Polejaeff. (3) 

 Euspongia officinalis. Ridley. (4) 

 Euspongia officinalis. F. E. Schulze. (5) 

 Feiner Badeschwamm, Eckhel. (6) 



(1) O. Schmidt. Die Spongien des Adriatischen Meeres. Leipzig, 1S62. 

 Seite 24. 



(2) E. Graeffe. Uebersicht der Seetliierfauna des Golfes von Triest nebst 

 Notizen iiber Vorkommen^ Lebensweise, Erscheinungs und Fortpflanzungs- 

 zeit der einzelnen Artcn. Arbeiten aus dem zoologischen Institute der 

 Universitat Wien und der zoologischen Station in Triest. Bd. 7, Heft 2, 

 1882, p. 3. 



(3) iV. PoUjaeff. Report on the Keratosa. Report on the scientific 

 results of the voyage of H.M.S. Challenger^ during the years 1873-76. 

 Zoology, Vol XL, part 31, 1885, p. 53. 



(4) Stuart 0. Rklhy. Spongiida. Report on the zoological collections 

 made in the Indo-Pacific Ocean during the voyage of H.M.S. Alert, 1881-2. 

 British Museum of Natural History Catalogue, 1884, p. 379. 



(5) F. E. Schulze. Untersuehungen iiber den Ban unci die Entwickelung 

 der Spongien, Siebente Mittheilung. Die Familie der Spongidse. Zeitschrift 

 fiir wissenschaftliche Zoologie. Bd. 32, Heft 4, 1879, p. 616. 



(6) Eckhel. Der Badeschwamm. Triest, 1877. 



