THE FAMILY OF THE DESMACIDINAE. 123 



Parencliym stellenweise sicli unregelmassige , festere Sar- 

 code-Membranen und von diesen aus Verdickungen und 

 unregelmassige, sich auch isolirende Fasern absondern." 



1. SclerUla /«?««* 0. S. '68. 

 Litt. Schmidt. Sp. K. A. p. 13. 

 Spic. tr°^. 



tr. ac. sp. 

 GO 



» foliato-peltate spicules." 

 anc^.3. 

 Loc. Algiers. 



2. ? Sclerilla lexUtrans 0. S. '68. 

 Litt. Schmidt. Sp. K. A. pag, 13. 

 Spic. tr°. ac. sp. 



tr. ac. sp. (tr. ac.) 

 tr°. ac. 



anc2? (Schmidt). 

 Loc. Algiers. 



Genus Myxilla 1). 0. S. 1862. s. str. 



Rods smooth or spined ; the spined rods prevailing , anchors 



hi- or tridentate , eqidended. Soft , slimy Sponges when 



alive ; brittle , easily reduced to powder , lohen 



driedf by the total absence of ^keratode- fibre. '^ 



1. * Mifjcilla rosacea 0. S. '62. 



Synon. Halichoudria rosacea Lbkn. (ace. to Schmidt). 

 Myxilla tridens 0. S. '64. 

 Myxilla fasiculata 0. S. '62 , [non Lbkn.] 

 Myxilla Esperii 0. S. in several collections. 

 Litt. Schmidt. Sp. A. M. pag. 71. (without illustr.) 

 Lieberkühn, Mull. Arch. 1859. p. 521. 

 Schmidt. 1 , suppl. p. 36. 



1) fii%K , slime. 



]Votes fron^ the Leyden IMuseuin, Vol. II. 



