( 147 j 
with Paradoxides Tessini-remains that was found in the collection of 
Groningen erratic-bloeks, given to the geological Institute at Lund by 
Mr. pe Sirrer, L. L. D., then burgomaster of Groningen. It was 
deseribed by LUNDGREN *). I am sorry that we do not learn whether 
it is gravel-stone or lime-sandstone. L wrote to Prof. Moere, director 
of the Institute mentioned above, in order to ask after this, but he 
could not give me any information concerning the piece just then. 
I think, however, that it is gravel-stone, LUNDGREN telling us that 
the colour is perahvit”, while according to Rormer*) lime-sandstone 
with Paradoxides Tessini is dark grey. 
While in the previous ease it has not yet been with certainty 
determined which kind of sandstone one has to deal with, RrmerÉ”) 
has announced another gravel-stone with Paradoxides-remains having 
been found. This erratie-block differs from the piece I described under 
a in the fossils being coloured brown by manganite-superoxide. 
However, I think this of little importance, as it may be just as well 
a consequence of infiltration that occurred in diluvial grounds or 
even before that time. 
Gravel-stone with Paradoxides Tessini has up to this time not been 
met with as firm rock. Probably it occurs as such, or did so in 
former times, in the neighbourhood of Oeland; for on the Western 
coast of this isle is found, in several places, lime-sandstone with the 
same kind of trilobites. 
ITD, Upper-Cambrian Stones. 
5. Alum-slate with Agnostus pisiformis L. var. socialis Tullb. 
One time I was so fortunate as to find a piece of black slate, in 
Which are scattered the grey head- and tailshields, preserved in relief, 
of a kind of Agnostus. They have a length and a breadth of 3 
millimetres at most. 
The head-shields are moderately vaulted. The dorsal furrows 
meet in front, and a tongue-shaped glabella is bounded by them. 
At the front-part of the glabella is on each side a lateral furrow. 
The two lateral furrows run into each other and in this way cut 
off a small part in front. At the foot of the glabella two smali 
lobes are separated from the rest by means of two lateral furrows 
slanting backward. The central, largest part of the glabella shows 
1) Lunpcren, Geologiska Föreningens i Siockholm Förhandlingar. 1874. If N° 2 
ATA 
pag. 44, 
2) Roemer, Lethaea erratica, pag. 29. 
3) Remeré, Zeitschr. der deutsch. geol. Gesellschaft. Bd 35. Jahrg. 1883 pag. S71, 
