277 



soiue ot the lueshes ol' the uetvvork of the surface there are 

 several storaious; iu others there is no opening at all or one large 

 stoma (?) Subdermal cavities are distinctly visible ; they lead the 

 water iuto the inhalant choues. The endochone is very insigui- 

 ficant and eau generally uot be distiuguished from the subcor- 

 tical crypt. From the crypts start short canals which open iuto 

 wide spaces and from these again narrow raraifying canals start. 

 The main excurrent canals open in somewhat various ways into 

 the apparatus which Schmidt called »Schornstein". Ou the mor- 

 phological value of this chimney I shall not speak here. I hope 

 to discuss this point soon in my work for the » Fauna & Flora". 



The skeleton of Caminus exhibits au unmistakable degeneratiön 

 from the tetraxile type. The specimens which were at my disposal 

 possess however more tetraxile spicules and less difformities than 

 the specimens of Schmidt. The strpngyles are arranged into 

 radial buudles aud , at about right angles hereon and inter se, 

 coucentrical bundies of less spicules occur. In addition to stron- 

 gyles and orthotriaenes , we fiud numerous asters and spherules. 

 In the cortex there are some layers of sherules (dermalia) and 

 under these several layers of sterrasters. No parenchymalia go 

 through the cortex. 



Spicules. Strongyle. Generally curved. 



Orthotriaene. Khabdome very short; cladi straight or somewhat 

 curved. Once or twice I saw these spicules without rhabdome at all. 



Sterraster. Rather large. 



Oxyaster. Typically with smooth actines , sometimes with spined 

 ones. They are not unfrequently reduced to microxeas. 



Spherule. Small, almost like those of Isops. 



My specimens were all found between Capri aud Naples at 

 a depth of 150—200 meter. 



Erylus euastrum (O. S.) Ridl. 



Syn. 1868 Stelletta euastrum O. S. 



Cf. Schmidt, Spong. Kuste von Algier (1868) p. 20 ; PI. IV, fig. 4. 



Weltner, Beitr. Kenntn. Spongien (1882) p. 45. 



