16 



E. ARNESEN. 



[REP. OF THE "MICHAEL SARS" NORTH 



tomical structure it seems to be identical with Ch. gigaiitea 

 Arm. Hansen — and here special notice must be taken of 

 the presence of a stalk-coating with granular styli, which 

 have been observed as mentioned with certainty only 

 in Ch. gigaiitea the "Schlammbelag" in Schmidt's 

 concrescens seems most doubtful. As to external aspect it 

 reminds one most of the species figured by Fristedt 

 (= Cladorhiza nobilis op cit), but it resembles also Ch. 

 concrescens Schmidt. 



Though as a whole, the relationship seems after all 

 to be closest with the concrescens of Ridley and Dendy, 

 and were it not for the absence in this of a stalk-coating 

 with granular styli, the widely separated localities, and 



the differences in depth as shown by the following list, 

 I would be inclined to refer it to that species. 



From these considerations I think it most practical 

 in accordance with the present state of our knowledge to 

 erect a new species, nearly related to the three above 

 mentioned inter se closely allied species. Further rese- 

 arches may perhaps elucidate the true generic relations 

 between them. 



Geographical distribution etc. of Chondrocla- 

 dia gigaiitea Arm. Hansen, Chondrocladia concrescens 

 O. Schmidt, Chondrocladia concrescens Ridley and Dendy 

 and the Chondrocladia from the "Michael Sars" expedi- 

 tion 1910: 



Name of species 



Locality 



Depth 



! Temperature 1 Deposit 



Number of 

 specimens 



Name of Expedition and 

 Literature 



Chondrocladia (St. 48) Lat. 64" 34' N. long,' 



10" 22' W.. 

 Arm. Hansen 



i 



Chondrocladia 

 concrescens 

 O. Schmidt 



Chondrocladia 



concrescens 



Ridly and Dendy 



Chondrocladia 



Michaelsarsi 



sp. n. 



(St. 51) Lat. 65" 

 7" 18' W 



53' N. long, 



(St. 137) Lat. 67' 

 8° 58' W 



24' N. long, 



East Greenland 



Off Nova Scotia? 



Between Iceland and Faeroe: 

 (St. 4) Lat. 64" 07' N. long, 



11" 12' W I 



(St. 64) Lat. 62" 06' N. long ; 



19" 00' W 



(St. 101) Lat. 66" 23' N. long, 



12" 05' W 



(St. 138) Lat. 63" 26' N. long, 



7" 56' W 



Faeroe Channel: 



Lat. 62" 53' N. long, 4" 17' E. 

 Lat. 62" 38' N. long, 4" 40' E. 



North W. Atlantic 



West Indies & Florida : 



Lat. 33"44'N. long, 83" 13' W. 



North Pacific (st. 248): 



Lat. 37 "41' N. long, 177"4'W. 



Spanish Bay (st. 23): 



Lat. 35° 32' N. long, 7" 7' W. 



Off Cape Bojador (st. 35, 

 st. 41): 



Lat. 27" 27' N. long, 14°52'W. 

 Lat. 28" 8' N. long, 13°35'W. 



547 m. 



2127 m. 



827 m. 

 238 m. 



329 m. 



433 m. 



1904 m. 



982 m. 



861 m. 



823 m. 



640 m. 



238-2127 



907-1620 m. 



5304 m. 



1215 m. 



2603 m. 

 1365 m. 



1215-2603 m. 



0°3 



1 ° 1 



1" 



Dark grey 1 spec. & se- 



clay 



Biloculina 

 clay 



Clay 



+ 2", 

 + 3", 



- 0°7 



- 0°6 



_ ? 



- 0°o 



3" i — 1° 1 



1°7! 



10°17 



(at 1200 m.) 

 ? 



Notw. North Atlant. Exp. 1887 

 veral frag- (Arm. Hansen: Spongids) 

 ments. Vide also: 



Lundbeck: Porifera Desma- 

 cideonida (pars) Danish 

 Ingolf Exp. 1905 p. 102. 



"Vega" Exp. 1887, Fristedt: 

 Sponges from the Atlant & 

 Arct Ocean etc. Vide also 

 Lundbeck (op. cit.). 



Verrill: Proc. of the U. St. 

 Nat. Mus. II. 1879, p. 204. 



Fragments ! Dilnisl1 Ingolf Exp. 1905. Vide 

 (op. cit.). 



3 spec. 



spec. 



Yellow mud 



Yellow mud 

 Yellow mud 



1 spec. & 

 fragments 



1 spec. 

 Fragments 



"Michael Sars" Cruise 1902. 

 Vide, Lundbeck op. cit., p. 108. 



OscarSchmidt: Spongien des 

 Meerbus. von Mexico 1879 p. 83. 

 Vide also Lundbeck op. cit. 



"Challenger" Exp. 1887: Ridley 

 and Dendy, Monaxonida. Rep. 

 Challenger, vol. XX. 



"Michael Sars" 1910. 



