188 M. E. Hackel's Prodromus of 



composed of communicating tubes, the inner wall of which is 

 villous (set with papillse), and their cavity simple (not cham- 

 bered). One species. 



123. *^. mtestmalis, H. Mogador (H.). 



Genus 36. *Auloplegma, nov. gen. 



Gen. char. The mouthless stock forms a root-like network, 

 the ramifications of which are communicating tubes with a 

 chambered cavity traversed by irregular partitions (outgrowths 

 of the entoderm). One species. 



124. *-4. loculosum, H. Australia. 



Family XV. Sycophyllida, H. 



Character. The mature calcareous sponge forms a stock 

 without mouth-opening, the stomachal walls of which are 

 traversed by regular radial canals (radial tubes) as in the 

 Sycodendrida. 



Genus 37. *Sycophyllum, nov. gen. 



Gen. char. Stomachal cavities simple, not chambered. 

 Two species. 



125. */S'. lobafum, H. Norway. 

 126.*S. compressum, H. Norway. 



Genus 38. *ARTyNOPHYLLUM, nov. gen. 



Gen. char. Stomachal cavities chambered, traversed by 

 irregular partitions. One species. 



127. ^A. co7npressum, H. Norway (H.). 



Family XVI. Sycolepida, H. 



Character. The mature calcareous sponge forms a stock 

 without mouth-opening, the stomachal walls of which are 

 traversed by irregular, ramified parietal canals (as in the 

 Dyssycida). 



Genus 39. *Sycolepis, nov. gen. 



Gen. char. The stock forms an expanded cnist or a shape- 

 less lump, in the parenchyma of which the simple (not cham- 

 bered) stomachal cavities of the persons are scattered, only 

 connected by the branched parietal canals and only opening 

 outwards by the cutaneous pores. Two species. 



128. ^S. incrustans, H. Norway (Schilling). 



129. '^ S. puh^mar, H. Indian Ocean (Schneehagen). 



