459 



longing to the Auloplegma-ïorm ; the largest one grows on a 

 Lithothamnion and has a greatest extent of about 15 mm. 



East- Greenland , without more particular locality (The 

 Ryder-expedition 1891—92); Tasiusak ^/5 1899, depth 5—19 

 fathoms (The Amdrup-expedition 1898 — 99). 



A. variabilis Haeck. 



1872. Ascandra variabilis Haeckel, Die Kalkschwämme, II, 106, Taf. 16, 



Fig. 4 a— 1, Taf. 18. 

 1898. — — , Breitfuss, Arch, für Naturgesch. 1898, 23. 



Of this species we have a small specimen of the Soleniscus- 

 form; it has an extent of only 5 mm. 



Jan Mayen ^^/e 1900, depth 15 fathoms (The Amdrup- 

 expedition 1900). 



Heterocoela. 

 Fam. Syconidae. 

 Sycon Risso. 

 S. ciliatum 0. Fabr. 



1780. Spongia ciliata 0. Fabiicus, Faun, gioenl. 448. 



1872. Sycandra ciliata, Haeckel, Die Kalkschwämme, II, 296, Taf. 51, Fig. 



1 a— t, Taf. 59, Fig. 9. 

 1898. Sycon ciliatum, Breitfuss, Arch, für Naturgesch., 1898, 23. 



Of this for Greenland classical sponge there are only two 

 specimens in the material, and they are both very small, of a 

 length of only 5 mm. 



70° 32' lat. TN., 8° 10' long.W. ^^/g 1891, depth 470 fathoms 

 (The Ryder-expedition 1891—92). 



GraDtia Flem. 



G. arctica Haeck. 



1872 Sycandra arctica Haeckel, Die Kalkschwämme, 11, 353, Taf. 55, Fig. 



1 a— V. 

 1898. Grantia arctica, Breitfuss, Arch, für Naturgesch. 1898, 26. 



There are several specimens of this species in the material ; 



they are all single persons with a long and fme oscular fringe 



which reaches a length of up to 10 mm. The largest specimen 



XXIX, 30 



