6 



BRITISH FOSSILS. 



General form broad oval, seldom reaching in length above an 

 inch ; of this the head occupies fully one-third. It is semi-oval, 

 without the fixed cheeks (fig. 1), but with them (and perfect heads 

 in Mr. Edgell's collection show them well) it becomes transverse- 

 oblong. The broad parabolic flattened glabella is more than equal 

 to the width of the cheeks, and has usually straight sides, sometimes 

 in Malvern specimens a little contracted in the middle (fig. 4). 

 Lobes very slightly marked (our fig. 4 has them too strong). The 

 neck segment enlarged at the sides, and quite distinct across. The 

 three pairs of fuiTOWS obscure. A very narrow margin in front of 

 the glabella. The fixed cheeks narrow triangular, the eye very far 

 forward, and connected with the front of the glabella by a low 

 ocular ridge. The neck-furrow on the cheeks very near the hinder 

 margin. Free cheek semicircular, very convex on its outer edge, 

 and with a strong but narrow margin, and no spine, the base 

 losely contracted. 



Labrum (fig. 4 a), in a Malvern specimen lent by the Kev. W. 

 Symonds, squarish, urceolate, with the base not expanded, the sides 

 convex, the apex broadly truncate ; the lateral furrows oblique, 

 broad, not deep. 



Body rings 14 (in a specimen lent by Mr. Ash, fig. 1). But this 

 number is somewhat doubtful, as I fi.nd my notes say it has only 

 12 distinct ones. The Swedish fossil has 13, according to Angelinas 

 fiigure, but his description gives 12, probably the true number. 

 Ours do not show a central tubercle. 



Tail semicircular, with broad blunt axis, showing one distinct 

 ring, and a larger terminal portion. The sides as broad as the 

 axis, and with three obscure furrows, the margin distinctly triden- 

 tate on each side, with short spines, not much projecting beyond 

 the border, which is not at all marginate. 



I believe we may safely identify with this the small species found 

 at Malvern (pi. 8, fig. 4), and described by Phillips under the name 

 of 0. spinulosus. We have copied his figure, Mem. Geo! Surv., 

 vol. ii. pi. 1, p. 55. It is certainly not Wahlenbergs species of that 

 name. The furrows of the glabella are far too plainly marked in 

 our figure, but the slight contraction visible on the sides of the 

 glabella is correct for Malvern specimens. 



Taking all the evidence together, I am inclined to think the 

 British fossil distinct from the Swedish; and I am principally 

 indebted to Mr. Edgell for the specimens which lead to this con- 

 clusion. I shall retain the name under which our fossil is usually 



