432 



We have some specimens which I determine with rather 

 great certainty as R. cinerea. They have an unispicular ske- 

 leton, and the spicules are of a length of 0'15mm, with an 

 average diameter of О'ООб mm. The specimens grow on sea- 

 weed and on Hydroids, they are not small, the largest specimen 

 has a greatest extent of 55 mm; they are of a lobate shape, 

 with oscula-bearing cones. The colour is grey, in some of the 

 specimens with a yellowish or rosy tinge, in others quite grey. 



Jan Mayen ^s/g 1900, depth 50—60 fathoms (The Amdrup- 

 expedition 1900); Angmagsalik ^^/3 1901 (Søren Nielsen). 



R. tubulosa Frstdt. 



1887. Reniera tubulosa Fristedt, Vega-Exp. vetensk. lakttag. IV, 419, PI. 



24, fig. 1. 

 1902. — — , Lundbeck, The Danish Ingolf-Exp. VI, 1, 44, 8, PI. 



II, fig. 5, PI. XI, figs. 11 a- c, flg. 12. 



Some in all respects typical specimens. 

 Tasiusak ^2/5 1399 depth 20—30 fathoms (The Amdrup- 

 expedition 1898—99). 



R. sp. 

 In «The Danish Ingolf-Exp.» VI, 1, 49, PI. XI, fig. 17 a 

 species of Reniera is mentioned, indicated as Reniera sp. a, 

 which was taken in Scoresby Sund, depth between 10 and 60 

 fathoms (The Ryder-expedition 1891 — 92). Later on a specimen 

 has been brought home which quite resembles the mentioned 

 species, it is likewise lengthily pyriform and of the same size; 

 also the spicules are quite agreeing, so that these specimens 

 are no doubt identical. The specimen was taken in Angmag- 

 salik Fjord ^/8 1902 (Kruuse). 



R. sp. 

 In the Ingolf-work quoted (50, PI. XII, fig. 2) another Reniera 

 species is mentioned, indicated d^^ Reniera sp. с; it shows some 

 affinity to R. Voeringii Ldbck. (= R. simplex Arm. Hans.), but 

 the spicules are a little different. The specimens were taken 

 in Hekla Havn (The Ryder-expedition 1891—92). 



