t4 . J(>I1AN KJÆK. M.-N, Kl. 



/'/i\ llocarids. 



Dictyocciris sp. 



Fragmc-ntary fossils probabl\- bclongin<^ to l'hx'llocarids often of \er\- 

 considerable size are very frequent in the fish iiori/.oii. 'ihe)' have also 

 been found very richly, but in bad ])reservation in the hicAyocaris- 

 hori'/.on. Most of them have a peculiar, reticulate surface and belong to 

 the strange form Dicfi/ocaris^ in the Scotch Downtonian that has been 

 described by Salter. By the kindness of Dr. J. Horxk I have been 

 enabled to compare my specimens with the Scotch ones. 



Ceratiocaris sp. 



In addition to Dicti/ocnris. remains of Ceratiocaris-forms have been 

 found in both horizons. They are unfortunately not well preserved, and 

 cannot be more exactly determined. 



Eurypterids. 



Remains of Eurypterids are very common, especially in the fish 

 horizon. Two species of Eiirypterus have been found in somewhat good 

 specimens, and they are of consequence in determining the age of the 

 strata. The trails, which occur very richly in one lower and one upper 

 horizon, were probably produced by one of these forms. I therefore 

 designate them Alerostomichnites. 



Earypterus Norvégiens nov sp. 



The most common form, of which many well preser\ed specimens 

 have been found in the fish horizon. A fragment, probably of the same 

 form was found higher up in the series. It is somewhat doubtful, 

 whether an Eurypterid fragment from the Didyocaris-hoxxzon belongs 

 to this form or not. 



This form is related to E. lanceolahis Salter, that is characteristic 

 of the Downtonian in Scotland. The body, however, is more slender in 

 front, and the proportions of the abdominal segments are different. I there- 

 fore present it as a new species. 



Earypterus minutus nov. sp. 



A quite small form, that is very rare in the fish horizon. It seems 

 to be closely related to E. pygmaeiis Salter, that in England has been 



