194 



O. Nordgaard. 



-- 2 L899, Mortsund T, 200 m. 

 Nodosana soluta, Cristellaria rotulata, Cristellaria crepidula. 



28 :: 1899. The Tys Fiord, 500 m. 

 Pulvinulina punctulata on Lophohelia prolifera. 



18 / 2 1 899, The Sag Fiord. 200 m. 

 Saccamniina sphaeriea. 



: L899, The Sea NW of Rest, 700 m. 

 Rupertia stabilis. 



14 4 1899. Malangen, 380 m. 

 Astrorhiza arenaeea, Discorbina globularis. 



Vo 1890, Lyngen III, 300 m. 



Astrorhiza arenact a. 



Hammerfest (1894). 



Truncatulina lobatula, Truncatulina refulgens, Truneatulina 

 ungeriana, Discorbina globularis. 



Svaerholt (1894). 

 Discorbina globularis, Truncatulina lobatula. 



27 / 4 1899, The Porsanger Fiord. 200 m. 

 Rhabda/mmina abyssorum. 



With regard to the distribution of the Thalamophora, Mr. 

 Kuek writes 1 ) „ln taking a survey of the occurrence of Thala- 

 mophora in all the ocean-depths investigated by the North Atlantic 

 Expedition we find, in all, three different centres of distribution, viz: — 

 A. The southern gray clay, which includes the fiords and banks 



along the Norwegian coast, about as far as to 19° E. Long; 



and the gray clay near Iceland. 

 I'.. The northern gray clay, to which the fiords and banks along 



the Norwegian coast east of 19° Long., near Beeren Island 



and Spitzbergen belong, and the Rhabdammina clay. 

 C. The brown clay, which is divided into the Biloculina clay 



proper and the transition clay." 



KijER (1. c. p. 11) gives the following as being the forms 

 which are of must frequent occurrence in the southern gray clay 

 along the coast of Norway: — 



Uvigerina pygmaea, U. angulosa, Truncatulina lobatula, T. 

 refulgens, Nonionina umbilicatula, X. scapha, Lagena marginata, 

 Pullenia sphaeroides, Quinqueloculina seminulum, Globigerina bul- 

 loides, Bolivina dilatata, Bulimina elipsoides, B. marginata and 

 ( 'iissiiluliiiii hh vigata. 



As characteristic of the northern gray clay, Kj.kr (1. c. p. 12) 

 gives the following forms: — 



Astrorhiza crassatina, Lagena apiculata, Pulvinulina Tcarst ni, 

 Globigerina pachyderma. 



These are considered to be arctic forms. ..On the other hand, 

 there are some southern species which are either absent from the 

 field of the northern centre or at any rate are very scarce, and 

 do not attain to their full size, e. g. Bulimina marginata, Uvige- 

 rina pygmaea and angulosa, Operculina ammonoides.'' 2 ) 



The samples I have collected almost exclusively represent the 

 southern gray clay, of which Thalamophor-fauna they certainly give 

 a very complete illustration. 



It is of considerable interest to see that the limit between the 

 northern and southern gray clay on the Norwegian coast is fixed 

 at 19" Long., which lies near Tromso. Without thinking of this 

 fact, I have, for hydrographical and zoological reasons (ef. Part IV) 

 fixed Malangen as the boundary fiord or rather the transition fiord 

 between the preponderant boreal and the preponderant arctic fauna. 



This division is thus confirmed by a study of the deposits. 



'i Thalamophora, p. 10. The Norw. North Atl. Exp. 187(1—78. 



-I Willi respect to the chemical condition of the deposits, reference should 

 be made to Schmelck's treatise „On Oceanic Deposits". The Norw. North Atl. 

 Exp. Chemistry. A plate is adjoined giving the distribution of the deposits. 



