13 



sig og fineler gunstige existensbetin geiser. Foruden de i 

 Bundprøverne fra det graa Ler og fra Biloculinaleret ob- 

 serverede Arter, er her fuudet enkelte sydlige Former som 

 Ophthalmidiura tumidulum, Thurammina papillata, Trocham- 

 mina squamata, Amraodiscus tenuis, Textularia Williamsoni, 

 Nodosåria mucronata, Vaginulina costata og linearis, Pa- 

 tellina corrugata, Triloculina trigonuta, Quinqueloculina 

 angulata, Lagena curvilineata, alveolata, Planorbulina me- 

 diterranea, Pulvinulina concentrica, Discorbina rosacea. 



Biloculinaleret er saa udtømmende behandlet af 

 Schmelck, at jeg her væsentlig blot behøver at henvise til 

 hans Afhandling. Her skal blot nævnes de paa Biloculina- 

 leret og Overgangsleret almimdeligst forekommende Arter. 

 Som saaclanne kan nævnes Biloculina laevis, Globigerina 

 bulloides og pachydermia, Haplophragmium latidorsatum, 

 Trucatulina Wtillersdorfi, Rotalia orbicularis samt Lagena 

 apiculata, Det brune Ler synes at have en meget ens- 

 formig Fauna. Vistnok er der en del Arter, der ikke ån- 

 des paa den nordlige Del af denne Lersort, men forøvrigt 

 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 Rhabclammina 

 abyssorum fundet enkeltvis paa nogle faa Stationer. 



Biloculina laevis findes over hele denne Area 1 , men 

 er aldrig meget talrig paa hver enkelt Lokalitet, medens 

 de forskjellige Globigerina Arter altid er tilstede i sto r 

 Mængde. Hovedmassen dannes af Globigerina pachydermia, 

 der forekommer i store, smukke Exemplarer, medens Glob. 

 bulloides og Overgangsformerne, hvilke ogsaa er meget 

 talrige, synes at være smaa og lidet udviklede. 



Fra cle store Havdyb og ind mod Kysterne aftager 

 Globigerinaerne jevnt i Antal, indtil de nær land og incle 

 i fjordene omtrent er forsvundne. 



Det brune Ler i det hele tåget. 



conditions of existence favorable. In addition to the spe- 

 des from the gray clay and from the Biloculina Clay, 

 observed in the samples, a few southern forms are found 

 such as, Opthalmidium tumidulum, Thurammina papillata 

 Trochammina squamata, Ammodistus tenuis, Textularia 

 Williamsoni, Nodosaria mucronata, Vaginulina costata and 

 linearis, Patellina corrugata, Triloculina trigonula, Quinque- 

 loculina angulata, Lagena curvilineata, alveolata, Planor- 

 bulina concentrica, Discorbina rosacea. 



The Biloculira Clay has been so exhaustively treated 

 of by Schmelck, that I need really only refer the reader 

 to his paper. I will only name 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 pachydermia, Haplophragmium lati- 

 dorsatum, Truncatulina "Wtillersdorfi, Rotalia orbicularis 

 and Lagena apiculata. The brown clay appears to have 

 a very homogeneous fauna. It is true, there 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 

 differs principally from the Biloculina clay in the occur- 

 rence of species which really inhabit comparatively shallow 

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

 cial fauna, but the Rhabclammina abyssorum is found occa- 

 sionally at a few stations. 



Biloculina laevis is found over the whole of this 

 area 1 , but is never very numerous in any one locality, 

 while the various Globigerina species are present in great 

 numbers. The bulk of them is made up of Globigerina 

 pachydermia, 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 shore and in the fjords. 



The brown clay generally. 



