THE FAMILY OF THE DESMACIDINAE. i25 



tr. ac. sp. 



anc^.3. 

 Loc. Venice. 



In Schmidt's original specimen (Joann. Graz) I could 

 not find the slender tr. ac. 



4. Myaeillti, pulvinftf 0. S. '68. 

 Litt. Schmidt. Sp. K. Alg. p. 14. 

 Spic. tr^. 



ac". sp. 

 GO 

 anc^. 

 Loc. Algiers. 



5. Blyaeilltt proteitien 0. S. '68. 

 Litt. Schmidt. Sp. K. Alg. p. 13. 

 Spic. tr°. ac. sp. 



ac*. 

 anc*. 

 Loc. Algiers. 



It is very probable that this species is but a variety of 

 the following. 



6. * MyjcilUi fusciculata (Pall.) Vosra. (non 0. S.) 

 Synon. Halichondria fasciculata Lbkn. '59 



Spongia fasciculata Pall. ace. to Lbkn. 



Litt. Lieberkühn. Mull. Arch. p. 522. 



Spic. ac^. 



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

 anc^. 



Loc. Triest. 



Prof. F. E. Schulze in Graz possesses an original speci- 

 men of Lieberkiihn's Halichondria fasciculata , and kindly 

 permitted me to study this type of the species ; I found 

 that only the three (four) above mentioned spicules occur. 

 In Triest I very often had opportunity to examine this 

 Sponge and so I saw that these three (four) kinds of spi- 

 cules are constant. The Sponge is as common as M. rosacea 

 0. S. As for observations on histological structure , I must 

 refer to my following paper , which I hope will be soon read} . 



Notes froixi tbe I^eycleii ÜVIuseuru, Vol. II. 



