132 



more distinct. On each side of the metabranchial lobes there 

 are two strong nodes, but no keels. 



C. holsaticum Stolley. Three specimens of this species are 

 preserved in the Mineralogical Museum of Copenhagen. They 

 have broader, less prominent fronts; the anterio-lateral margins 

 are placed more slantingly; their spines are formed differently 

 to those in C. bicarinatum n. sp. No distinct keels are found. 



C. bicarinatum n. sp. was found at Кар Dalton in 

 great numbers in the numerous concretions in the shale. In 

 almost every concretion a specimen of this crab was found. 

 On account of this frequent occurrence I have called the bed 

 the Coeloma-bed. The sizes of the specimens are, as a rule, 

 almost the same as the size of the one to which the measure- 

 ments in the above description refer. There are however speci- 

 mens the size of which is much less, thus the carapace of the 

 smallest of the specimens present only measures 10,5 mm. in length, 

 and 14 mm. in breadth. A few other specimens are unusually large, 

 the carapace of one being about 41 mm. long, and 50 mm. broad. 



The Coeloma-bed: Very common. 



D. Insecta. 



In one of the concretions of the Coeloma-bed which is 

 quite filled with imprints of fragments of leaves , and other 

 remains of plants, I found a fragment of the wing of a Beetle. 

 On the surface of the wing are seen longitudinal rows of little 

 cavities. A closer determination is impossible. 



The fossils from the Coeloma-bed and the Cyrena-bed have 

 here been treated collectively. What the mutual relation in 

 age is between the two beds is not known; the only thing 

 known about the conditions of deposition is what has been stated 

 on pp. 99—100. But I must remark that the bits of shale, 

 which are found in the sandstone of the Cyrena-bed, have some 



