424 
THE GEOLOGIST. 
Mr. Salter to be identical with the Paradoxides Forchhammeri of 
Angelin from the alum-shales of Andranim, in Scania. 
Although but little known in the English strata, these little Ag- 
nosti are, according to Brongniart, so abundant in the beds near 
Heltris, in Sweden, as to give an oolitic character to the rock. 
Remains of a phyllopod or stomapod crustacean, Hymenocaris ver- 
micauda, occur plentifully in the beds with Lingtda Davisii at Dol- 
gelly and Tremadoc, where so-called tracks of annelides, sometimes 
of considerable size, are also stated to be met with. 
lagn. 10. — Htmbnocakis 
VBEMiOAUDA. From the 
restored figure by Mr. 
Salter in "Silnria." 
From specimens from 
Dolgelly. 
Some caution may be necessary in speaking of such fossils as 
worm-tracks ; for although no remains of Olenidae have as yet been 
found in these " track-mark" beds, yet as those trilobites are found 
in strata of equivalent age, it is quite possible that they existed on 
these shores when these Silurian sediments were formed. And as 
Mr. A. Hancock has shown in his valuable paper on Vermiform- 
fossils, in the " Annals of Natural History" for 1858 (3rd series, vol. 
ii , p. 443), that some of the so-called anneUde-tracks have been 
formed by small burrowing crustaceans, it is quite possible that we 
Lign. 9. — Pabado'xides 
POECHHAMMEKI (? Allgolin) 
from the figure in ' ' Siluria' ' 
of the specimen in the Mu- 
seum of Economic Geo- 
logy, Jermyn-street. 
