BRITISH FOSSILS. 



9 



margin narrow, the long sub- cylindrical glabella touching it. The 

 axal furrows are deep ; the glabella narrower forwards and rounded 

 in front, with a strong neck-lobe, not spinous but with a central 

 tubercle, a pair of complete basal grooves cutting off the lower 

 third of the glabella, and an incomplete upper pair. 



The fixed cheeks consist of an oblong convex plate in front of 

 the eye, which is placed far back, opposite the basal furrow, and 

 about the width of the gla,bella apart from it. The ocular ridge is 

 very oblique, and only reaches the front edge of the broad eye lobe. 

 The facial suture is sinuous, but nearly vertical to the eye, and be- 

 neath it turns abruptly outwards in a line all but parallel to the 

 neck margin, and reaches it at a distance from tlie glabella equal 

 to twice the width of that organ. The neck furrow is narrow, but 

 distinct all along. 



[The cheek, in a separate specimen of Mr. EdgelFs probably 

 belonging to this, is a quadrant of a circle, with a round prominent 

 eye, and a narrow margin on the outer edge. The spine starts con- 

 siderably above the angle, and on the level of the eye, and appears 

 to be short and not much curved.] 



Thorax of — ? rings. We have only six preserved ; they are 

 broad, straight, equal in width to the axis, excluding the strong 

 patent spine, which bends very little backward, and is about as 

 long as the pleurae themselves. The pleural groove is deep and 

 broad, and reaches the base of the spine. The axis is convex, and 

 has a spinous tubercle on each segment. 



Locality and Geological Position. — Upper Lingula Flags, 

 Whiteleaved Oak, Malvern. (Mus. Pract. Geol.) 



OLENUS (SPH.aEIl.) PEC TEN. 



Plate VIII. Figs. 12, 13. 



Diagnosis. 0. parvulus 7no7isirosus, capite contracto longlspinosoy 

 thorace multispinoso, cauda mira pectinata et in spinam longissimam cen- 

 tralem producta. Caput ad frontem emarginatum, glabella brevi, gena 

 angusta spinam medianam curvam gerente. Oculis omninc antrorsis. 

 Thorax pleuris rectissitnis, spinis aciculatis. Cauda spinis iitrinque sex 

 paralleliSy et mediana longissima. 



Oblong, the head contracted in width, emarginate in front, with 

 narrow glabella, and furnished with convex projecting cheeks, 



