12 Hjalmar Ostergren. [No. 9 



also seen a specimen which Dr. J. Hjoet found in the Varanger 

 Fiord, 200 m., clay, + 2.2" C. 



12. Synapta inhærcns (0. F. Mullee). 



In the Bergen Museum there is a specimen of this species, 

 caught by G. 0. Såes at a depth of -10—50 m. at Skraaven 68" 10' N. 

 (Lofoten). This is the only reliable find of S. inhærens, north of 

 the Arctic circle. All statements, at present to hand, regarding the 

 existence of this species in these northern regions seem to be due 

 to a confusion with the next species. 



13. Labidoplax buski (MIntosh). 

 Syn. Synaxjta tenera Noeman.^) 



Kirk Fiord, Moskeneso, 67» 58.5' N., % 1899, 50 m., clay, -f 2.5 C. 



In the Christiania Museum there are specimens of this species 

 from Skraaven 68" 10' N., 370 — 550 m., also from Brettesnes, 

 68" 12' N., 75 m, and 220 m. The specimens of Synapta inhærens 

 which Danielssen & Koeen (1882) mention from the Porsanger 

 Fiord 70" 54.8' K, also have on my examination been proved to 

 be LaUdoplax ImsM. The same is undoubtedly the case regarding 

 the „ Young specimens of Stjnapta inhærens'', which Danielssen 

 (1861) mentions as from the Komag Fiord 70" 14' N., and the 

 Yar anger Fiord at Yadso 70" 3' N. Danielssen had himself noticed 

 some differences from S. inhærens. His statement is, translated, as 

 follows: „For some time I considered them to be a species different 

 from 8. inhærens^ but closer investigations have led me to believe 

 them to be young specimens of S. inhærens.'' It ought to be 

 mentioned, that Labidoplax husJci had not that time been described. 

 That it was this latter species, Danielssen had (I have not been 

 able to lind his specimens in the Norwegian museums) is evident 

 from many facts. The specimens have been all remarkably small, 

 as they were thought to be young ones. L. h2iski is, as a rule, 

 2 — 3 cm. long and 2 — 3 mm. thick. They were caught on clay 

 bottom, which is the usual place for this species, while Synapta 

 inhærens, at least no our coast, stick to sand or mud. Further, 



1) LuDwiG (1900) lias totally omitted tliis species. Still it was alreadj- 

 known at Husoen, Sogne Fiord, 6P N., tlius at a more northern place than 

 certain other species, which he admits into the categ-or\' of subarctic Holo- 

 thurians. 



