150 THE FAMILY OF TlIF DESMACJBINAE, 



I have examlued Schmidts original specimen , for which 

 I am indebted to the kindness of Prof. F. E. Schulze, and 

 many other specimens , which I found in the Adria. There 

 are but a few Sponges that have so characteristic a „habitus" 

 as Clathria coralloides , and so no confusion as to the 

 species is possible. In all these I found plenty of anchors. 

 At the same time I could see that the keratode-fibre fre- 

 quently varies in strength. I propose therefore to re- 

 cognise two varieties ; one is very soft (var. mollis) , the 

 other on the contrary has extremely strong keratode-fibre 

 [var. ceratodes '). The Ley den Museum possesses of this 

 latter variety two very interesting specimens from the 

 Mediterranean. The strong fibre prevails here ; only a few 

 spicules occur. Between this variety and the soft one , 

 there are naturally a great many transitions. 



2. * CIttthvia cotnpressu 0. S. '62. char. em. Vosm. 

 Synon. Spongia clathrus. Var. Esp. (ace. to Schmidt). 

 Litt. Schmidt. Sp. A. M. pag. 58. 



Spic. tr. ac. 



tr. ac. f. 



(tr°. ac. , tr°. ac. f.). 



tr. ac. sp. (much smaller than the smooth onesj. 



tr. tr. ? 



A 



anc^. (minute). 



Loc. Triest. 



3. Cfnthria tnorisctt 0. S. '68. Char, emend. Vosm. 

 Litt. Schmidt. Sp. K. A. p. 9. 



Spic. tr. ac. sp. 



tr. ac. sp. f. 



tr°. ac. 



tr°. ac. f. 



A (rare). 



rut^. (minute). 

 Loc. Algiers. 



1) KtpxTwSm , horny. 



Notes Iroin the Leyden IMii»eum , "Vol. H. 



