13 



sig og finder gunstige cxistensbctingelser. Foruden de i 

 Biind)3roverne fra det graa Ler og fra Biloculinaleret ob- 

 serverede Arter, er her fiiiidct enkelte sydlige Former som 

 Oplitlialmidiun) tumidnlum, Tlmraniniiua papillata, Troeham- 

 inina sqnamata, Amraodiscus temiis. Textularia Willianisoni, 

 Nodosaria mucroiiata, Vaginulina costata og linearis. Pa- 

 tellina corriigata, Triloculina trigomita, Quin(ineloculina 

 aiignlata, Lagena cnrvilineata, alveolata, Planorbulina nie- 

 diterranea. Pulvinnliiia eoncentrica. Discorbina rosacea. 



Biloculinaleret ei- saa udtomnieiide beliandlet af 

 Sclimelck, at jeg lier væsentlig blot beiiøver at henvise til 

 hans Afiiandling. Her skal blot iiævnes de paa Biloculina- 

 leret og (^vergangsleret alniindeligst forekommende Arter. 

 Som saadanne kan nævnes Biloculina laevis. Globigerina 

 bulloides og pach3'derina, Haplophiagmium latidorsatum, 

 Trucatulina Wiillersdorfl, Rotalia orliicularis samt Lagena 

 a|)iculata. Det brune Ler synes at have en meget ens- 

 formig Fauna. Vistnok er der endel Arter, der ikke fin- 

 des ])aa den nordlige Del af denne Lersort, men forovrigt 

 er der meget liden Forskjel inden dens enkelte Dele. 

 Overgangsleret adskiller sig væsentlig fra Biloculinleret 

 ved Forekomsten af Arter, der egentlig har hjemme paa 

 forholdsvis grundt Vand. Den østlige Del af det brune 

 Ler har ingen særegen Fauna. Dog er her Eliabdammina 

 abyssorum fundet enkeltvis paa nogle faa Stationer. 



Biloculina laevis findes over liele denne Area ', men 

 er aldrig meget talrig paa hver enkelt Lokalitet, medens 

 de forskjellige Globigerina Arter altid er tilstede i sto^ 

 Mængde. Hovedmassen dannes af Glol)igerina pachyderma, 

 der forekommer i store, smukke Exemplarer. medens Glob. 

 bulloides og Overgangsformerne, hvilke ogsaa er meget 

 talrige, synes at være smaa og lidet udviklede. 



Fra de store Havdyb og ind mod Rysterne aftager 

 Glo])igerinaerne jevnt i Antal. indtil de nær land og inde 

 i fjordene omtrent er forsvunchie. 



Det brune Ler i det hele tåget. 



coiulitions of existence favorable. In addition to the spe- 

 cies from the gray clay and from the Biloculina Clay, 

 observcd in tiie samples, a few southern forms are found 

 such as, Opthalmidium tumidnlum, Thurammina })apillata 

 Trochammina squamata, Ammodistus tennis, Textularia 

 Willianisoni. Nodosaria mucronata, Vaginulina costata and 

 linearis, Patellina corrugata, Triloculina trigonula. Quinque- 

 locnlina angulata, Lagena cnrvilineata. alveolata, Planor- 

 bulina co!icentrica. Discorliina rosacea. 



'r\n' Biloeulira Clay has been so exiiaustively treated 

 of by Sclimelck, tliat I need really only refer the reader 

 to his paper. T will only narae the most generally occur- 

 ring species in the Biloculina Clay and the Transition 

 Clay. Among these may be named Biloculina laevis, Glo- 

 bigerina bulloides and pachyderma, Haplophragmium lati- 

 dorsatum, Truncatulina Widlersdorfi, Botalia orbicularis 

 and Lagena apieulata. The brown clay appears to have 

 a very horaogeneous fauna. It is true, tliere are a few 

 species which are not found in the northern portion of 

 this kind of clay, but beyond that, there is very little dif- 

 ference between its separate parts. The Transition Clay 

 difters principally from the Biloculina clay in the occur- 

 rence of s])ecies which really inhabit comparatively shallow 

 water. The eastern part of the brown clay has no spe- 

 cial fauna, but the Riiabdamiuiiia abyssorum is found occa- 

 sionally at a few stations. 



Biloculina laevis is found over the wliole of this 

 area \ but is never very numerous in any one locality, 

 •vvhile the vaiious Globigerina species are present in great 

 nuinliers. Tlie bulk of them is made up of Globigerina 

 pachyderma, of which large and beautiful specimens are 

 found, while Glob. bulloides and the trasition forms, which 

 are also very numerous, seem to be small and not greatly 

 developed. 



From the great depths of ocean and in towards the 

 coast the Globigerina decrease in number, until they 

 almost disappear near the sbore and in the fjords. 



The brown clav <;enerallv. 



