0. Noidoaard. 



-"■h 1899, Mortsund T, 200 m. 

 Nodosaria sohda, Cristellaria rofulufu. Cristell'iria n-pphhihi. 



=73 1899. The Tys Fiord, 500 ni. 

 Piilrhud'nui pioictiilata on Lophohclia prolifvra. 



"A 1899, The Sag- Fior'd. 200 m. 

 Saccamm ina sphaerica. 



=-/.■, 1899, Tlie Sea NW of Røst, 700 m. 

 Biipcrfia stahilh. 



"A 1899. Malangen, 380 m. 

 Astrorhizfi arcnacen, Discwhina yhlmluns. 



Vo 1899, Lyngen III, 300 ni. 

 Asirorhua nrenaceu. 



Hammerfest (1894). 

 TnmcatitUna lohntuJn. TruncdtiilhKi refiihjens. TriinctifuVma 

 iDn/cyinnd, Discvrhina ijluhnlaiis. 



Sværholt (1894). 

 Discorhintt glohuJari^, TnincdfuliiKi lohidula. 



-■/i 1S99, The Porsanger Fiord, 20o ni. 

 IiJiitliilamininii nhyssoriim. 



With regard to the disti'ibution of the Thalamophora, Mr. 

 Kiær writes') „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 centi-es 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 neai- Iceland. 

 P.. Tlie northern gi-av clav. to Avliicli the tiords and banks along 



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



and Spitzbergen belong, and the BhaMammina clay. 

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



proper and the transition clay." 



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

 which are of most frequent occuri-ence in the southei-n gray clay 

 along the coast of Norway: — 



Uvifjerina pygmaea, U. anyuhsa. TrunmiuJhm lohatiila, T. 

 refnlgens, Nonionma umhiUcatula, N. scapha, Lagena marginata, 

 Piillenia sphaeroides, Quinqiieloctdina semmulum, Qhhigerina hid- 

 hides, Bolivina dilatcda. BuUmlnn eJipsoulcs, B. margimda and- 

 Cassididina laerigcda. 



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

 gives the following forms: — 



Astrorhiza crassatina, Lagena ajiiralata, Pidrinalina larsteni. 

 Glohigefina pacliyderma. 



These are considered to be arctic forms. „0n the other hand, 

 there are some southern species which are either absent from the 

 field of the northei-n centre or at any rate are veiy scarce, and 

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

 riiia pygmaea and angidosa, Opereulina ammonoidesr' -) 



The samples I have collected almost exclusively represent the 

 southern gray clay, of M-bich Thalamophor-fauna they certainly give 

 a very complete illustration. 



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

 northern and southei-n gray clay on the Norwegian coast is fixed 

 at 19° Long., which lies near Tromsø. Without thinking of this 

 fact, I have, for hydrographieal and zoological reasons (cf. Part IV) 

 fixed Malangen as the boundary fiord or i-ather the transition fioi'd 

 between the preponderant boreal and the preponderant arctic fauna. 



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



1) Thalamopho) a, p. 10. The Norw. Nortli Atl. Exp. 1876—78. 



2) With respect to tlie chemical condition of the deposits, reference should 

 be made to Schmelck's treatise „()u Oceanic Deposits". The Norw. Noi-tli Atl. 

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



