THE FAMILY OF THE DESMACIDINAE 151 



The above mentioned spicules are found in an original 

 specimen, sent to me by Prof. Schmidt. 

 4. * Clathvin lobala. nov. spec. 

 Spic. tr. ac. f. (tr° ac. f.). 



tr. ac. sp. (strongly spined). 

 ac^. (rare). 



tl'2. 



A (sp.)- 



anc^. 



Loc. Cape of Good Hoope. [Mus. L. B.]. 



The Leyden Museum possesses two beautiful specimens 

 of this Sponge. One has no indication of locality, the 

 other is fiom the Cape of Good Hope. 



The Sponge, which in the dried state is pure white, 

 is rather elastic on account of the keratode-fibre. It forms 

 more or less flat, branching lobes. 



Very characteristic for this species are' the bows, the 

 ends of which are spined, (Schmidt describes quite such 

 bows of his Suberites arciger ^). The anchors are small but 

 rather stout, few in number. The spines of the tr. ac. 

 sp. are very strong , and bent towards the blunt end of 

 the spicule. In the formula I have designated with a -^ 

 the small spicules which are often almost bent into a circle. 

 I could not distinctly see whether the ends are blunt or 

 pointed. Also in the following Sponge these spicules occur. 



It seems to me not impossible that Schmidt's Suberites 

 arciger is indeed a Clathria , closely allied to our Clathria 

 lohata. But as I have not seen an original of it, I can 

 not speak definitely. 

 5. * Clnthria ultnu.t nov. spec. 



Spic. tr°. ac. 



tr° ac. f. (tr. ac. f). 

 tr. ac. sp. 



1) Grundziige einer Spongien-Fauna des Atl. Gebietes pag. 47. 



Notes from the Leyden IMuseum, Vol. II. 



