10 A MONOGRAPH OF THE AUSTRALIAN SPONGES, 



II. SUBORDO. GUMMING. 

 0. Schmidt (1). 



MYX0SP0NC4I.^ WITH A MESODERM RENDERED TOUGH BY 

 NUMEROUS DENSELY PACKED FIBRILLS WHICH FORM THE 

 MAIN PORTION OF THE WHOLE SPONGE AND WHICH GIVE 

 TO IT THE KNOWN INDIA-RUBBFR LIKE DEGREE OF ELAS- 

 TICITY AND HARDNESS. WITH OR WITHOUT SPHERICAL 

 POLYACTINELLID FLESH-SPICULES. 



This Subordo comprises at present only the single Family of 

 the Chondrosidae 



When the aberrant Cellulojjhana 0. Schmidt, will be better 

 known it may perhaps require the establishment of a family for 

 itself. 



Gorticium, O. Schmidt, which as we shall see connects the 

 Gumminae with the Tetractinellidre might perhaps also be placed 

 in a separate family of the Gumminfe. 



10. FAMILIA. CHONDROSID^. F. E. Schulze (2). 



With the characters of the Subordo. 



F. E. Schulze (3) has taken the trouble to enumerate all 

 Sponges which have been described as members of this group. 



There are seven genera enumerated by him : — Chondrosia, 

 Nardo (4) ; Chondrilla, O. Schmidt (5) ; Osculina, 0. Schmidt 

 (6) ; Columnites, O. Schmidt (7) ; Gorticium, O. Schmidt (8) ; 

 Cellulophana, 0. Schmidt (9), and Lacinia, Selenka (10). 



(1) 0. Schmidt. Die Spongien des Adriatischen Meeres. Seite 37. 



(2) F. E. Schulze. L.c. Seite 87 ff. 



(3) F. E. Schulze. Die Familie der Chondrosidaj. Zeitschrift fiir wissen- 

 schaftliche Zoologie. Band XXIX. , Seite 95. 



(4) Nardo. Osservazioiie anatomiche supra 1' animale marino detto 

 volgarnente Rognone di mare Estratte dal, Vol. VI., degl' Atti dell' 

 Istituto Veneto. 



(5) 0. Schmidt. Die Spongien des Adriatischen Meeres. Seite 38. 



(6) O. Schmidt. Die Spongien der Kilste von Algier (Drittes Supplement 

 zu den Spongien des Adriatischen Meeres.) Seite 42. 



(7) 0. Sclimidt. Grundzuge einer Spongienfauna des Atlantischen 

 Gebietes. Seite 25. 



(8) 0. Schmidt. Die Spongien des Adriatischen Meeres. Seite 42. 



(9) 0. Schmidt. Die Spongien des Adriatischen Meeres. Seite 41. 



(10) E. Selenka. Ueber einige Suhwamnie aus der Slidsee, Zeitschrift fii 

 Wissenschaftliche Zoologie. Band XVII., Seite 568. 



