Salter—Budleigh Salterton Pebble-Bed. 11 
Fig. 2 represents a Vexillum, and fig. 3 a Dedalus, so far 
as I understand these genera. In a rough section made by 
abrasion of the pebble, and shown at the right hand of fig. 3, we 
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sy 
Deedalus ; a fossil Fucoid from the pebbles at Budleigh Salterton. Nat. size. 
Fig. 3. 
zs b shows the probable shape of the entire frond. 
see the incurved opposite surface of the cone or cup, for the 
frond was bent round much in the way a filter-paper is curved 
into a sugarloaf-shape (see the left-hand figure 6, fig. 3). 
Neither apex nor base of the original cone is preserved; but 
in the section there is something like a decussating set of fibres, 
as if the walls had been held together by plates of cellular 
tissue. The oblique surface-ridges are far too regular to be 
accidental; but if I were obliged to choose between assigning 
to this group of fossils a vegetable origin, and considering them 
due to the movements of an animal in the sabulous matrix, I 
should be reluctant to deny the latter alternative. 
Fig. 4. Interior cast of the left carapace-valve of Myocaris Lutraria, from a pebble of Silurian 
Sandstone at Budleigh Salterton. Nat. size. 
Myocaris Lutraria, new genus and species.—We have only 
the interior cast (in hard sandstone) of a single carapace- 
valve, which is transversely oblong, with square angles at 
back and front, 24 inches long, and more than an inch wide 
beneath the beak, which is*abruptly prominent, and placed at 
