12-4 THE FAMILY UI" THE DES.MACIDINAE. 



Schmidt, Sp. K. A. pp. 13 and 27. 

 Spic. tr. ac, sp. 

 tr. ac. 



tr°. 2; (the ends with three spines). 

 ac~. 

 GO 



anc^.3. 

 Loc. Trië.st, Zara, Venice, Algiers, 



In Schmidt's original specimen of M. fasciculata (not :=z 

 Hal. fasciculata Lbkn., as will be shown fnrtheron), desposited 

 in the Joauneum-Collection in Graz , 1 have found exactly 

 the same spicules as in M. rosacea and M. tridens. So I 

 feel justified in concluding to the identity of those three 

 species. Even in the original specimen of M. tridens I 

 could not find the curious spicule, described by Schmidt ^) 

 pag. 37 ; so I believe Schmidt is right in saying : „er 

 könnte also ein Eiudriugling sein." 



2. Mfixilla thelu") nov. spec. 

 Spic. tr. ac. 



tr. ac. sp. 



ac^. 



CO (very numerous , stout ; also little ones). 



anc~.3 

 Loc. Triest. 



This indubitable Mtjuilla occurs as a yellowish gray 

 crust on stones. It is characterised by the acerate bars 

 the ends of which are teat-shaped. The preceding sponge 

 on the contrary has acerate rods of the usual form , and 

 has besides these , the characteristic tridentate tr°^. 



3. MyxilUi venein 0. S. '62. 

 Litt. Schmidt. Sp. Adr. M. p. 71. 

 Spic. ac*. 



tr. ac. 



1) I Supplement. 1864. 



2) Qii^ii, teat. 



Noteis Iron"! the Leyden Museum, Vol. II. 



