452 



We have four specimens; the smallest one which has a 

 diameter of 12mm is very conical downvards, but flat above; 

 the largest specimen, of a diameter of about 40 mm, is hemis- 

 phaerical above and somewhat hollowed below. — I have seen a 

 small fragment of Fristedt's specimen of Radiella spinularia, 

 and I think it is Trichostemma. 



Forsblad-Fjord -^^/g 190O, depth 50—90 fathoms (The Am- 

 drup-expedition 1900); East-coast of Greenland, depth 130 fathoms 

 (The Swedish arctic expedition 1883; Fristedt I.e.). 



Quasillina Norman. 



Q. brevis Bow. 



1861. Euplectella brevis Bowerbank, List. Brit. Marine tn-vert. Faun. (Brit. 



Assoc.) 71. 

 1866. Polymastia brevis Bowerbank, Mon. Brit. Spong. II, 64, et ibid. 1874, 



III, PI. XI, figs. 1-9. 



Of this species we have a single, small specimen. 

 74° 17' lat. N., 15° 20' long. W., depth 127 fathoms (The 

 Ryder-expedition 1891—92). 



Tentorium Vosm. 



T. semisuberites O. Schmidt. 



1870. Tecophora semisuberites 0. Schmidt, Grundzüge einer Spongienf. des 



allant. Gebiet. 50, Taf. VI, Fig. 2. 



1874. — — 0. Schmidt, Die zweite deutsche Nordpolar- 



fahrt, II, 2, 430. 



1887. — — , Fristedt, Vega-Exp. vetensk. lakttag. 433. 



This common and nearly cosmopolitan species is present 

 in the collections in rather great numbers; there are specimens 

 of all sizes from a height of 30 mm down to only 3 mm. 



At Sabine-Island ^"/7 1900, depth 110 fathoms; Forsblad- 

 Fjord ^0/8 1900, depth 50—90 fathoms; Hurry-Inlet 1^/8 1900, 

 depth 50 fathoms; Cape Tobin "Vs 1900, depth 57 fathoms 

 {The Amdrup-expedition 1900); East-Greenland, without parti- 

 cular locality (The Ryder-expedition 1891 — 92); at Angmag- 

 salik, depth 50 fathoms (Kruuse); East-coast of Greenland (The 



