BY R. VON LENDENFELD, PH.D. 535 



76. SPECIES. EUSPONGIA BAILYI. Nova species. 



Shape and Size. 



This sponge has the shape of a cup or goblet. This shape 

 is very constant and characteristic. Sometimes there are two cups 

 joined to each other. Generally, however, there is only a single 

 one. The cup stands upright on the sea bottom to which it is 

 attached by one or more points of the more or less expanded base. 

 Sometimes the cup is high and narrow, twice as long as broad ; 

 sometimes it is broad and horizontally expanded, barely as high as 

 broad. 



The cup attains a height of 170 mm. and a breadth of 190 mm. 

 It is in the specimen 170 mm. high, 105 mm. deep. Generally 

 about two-thirds of the height of the sponge in depth. The 

 lamella forming the cup thins out towards the margin very 

 rapidly so that the margin, which always is very regularly circular, 

 appears quite sharp. 



Surface. 



The outer surface is very rough and uneven. There are high 

 irregidarly longitudinal ridges, and also other outgrowths of 

 varying shape. The skeleton presents a great irregularity of the 

 outer surface. The inner side of the cup is very smooth, and the 

 skeleton possesses on that side numerous round holes, averaging 

 3 mm. in diameter, which probably indicate the position of the 

 oscula. 



As only dry skeletons are at my disposal, I am not able to give 

 a detailed description. 



E.IGIDITY. 



The sponge is pretty soft and elastic. By the pressure of 1 

 kilogramm on the side of the cup it is depressed (large specimen) 

 about 10 mm. Small pieces of the cup wall, of the size of a cubic 

 centimetre can be compressed by the weight of 1 kilogramm to a 

 thickness of 1 mm. 

 35 



