457 



With regard to the absence of the discohexasters I dare for 

 the present say nothing sure, should they prove to be quite 

 wanting, it seems to me, that the species would belong to the 

 genus Bathydorus. 



Forsblad-Fjord -^"/s 1900, depth 50-90 fathoms (The Am- 

 drup-expedition 1900); Fri stedt had the species from East- 

 Greenland, depth 125 fathoms (The Swedish arctic expedition 

 1883). Schulze had his specimens from north of Spitzbergen 

 in a depth of 530 fathoms. 



Besides the above mentioned species we have further an 

 indeterminable fragment of a species belonging to the Ros- 

 sellmae, taken at Angmagsalik, depth HO fathoms (The Am- 

 drup-expedition 1900). 



Oalcarea. 



Homocoela. 



Fam. Asconidae. 



Leucosolenia Bow. 



L. coriacea Mont. 



1818. Spongia coriacea Montagu, Mem. Wernerian. II, 116. 



1872. Ascetta coriacea, Haeckel, Die Kalkschwämme, II, 24, Taf. 3, ïaf. 5, 



Fig. 2 a— с 

 1898. Leucosolenia coriacea, Britfuss, Arch, für Naturgesch. 1898, 20. 



This species is somewhat richly represented in the ma- 

 terial; one specimen is of the Nardorus-form the others are 

 of the Auloplegma-iorm ; the largest specimen of these latter 

 has a greatest extent of 25 mm. The colour is brown or grey. 



Tasiusak Ч& 1899, depth 25—30 fathoms (The Amdrup- 

 expedition 1898— 99); Tasiusak ^^/s 1902, depth 30—50 fathoms 

 (Kruuse); 70° 32' lat. N., 8° 10' long. W., depth 470 fathoms 

 (The Byder-expedition 1891—92). 



L. Lamarckii Haeck. 



1872. Ascaltis Lamarckii Haeckel, Die Kalkschwämme, II, 60, Taf. 9, Fig. 5, 



Taf. 10, Fig 4 a— d. 

 1874. — — Haeckel, Die zweite deutsche Nordpolarfahrt, 11,434. 



