294 ME. E. S. COBBOLD ON TEILOBITES [Aug. JpII* 



Eye-lobes. — Bather small; about a sixth of the total length 

 of the head-shield without the spine, and situated a little behind 

 the middle of the length of the glabella ; haying the outer edge 

 distinctly raised, so that there is a hollow between it and the fixed 

 cheek. 



Ocular ridge. — A slightly raised ridge, curving back from the 

 anterior ends of the sides of the glabella to the eye-lobe, near which 

 it loses prominence. 



Postero-lateral border. — The furrow runs in a straight line 

 with the occipital furrow transversely to the axis of the head- 

 shield ; the fold widens considerably outwards, so that the actual 

 margin diverges considerably from the line of the furrow. 



Front. — Extending forwards for a distance equal to about half 

 the length of the glabella and consisting of three subequal parts, 

 a convex swelling connecting the fixed cheeks ; a wide, rounded 

 hollow, and a well marked, rounded marginal rim, which extends,, 

 with very little loss of strength, to the facial sutures. 



Eacial suture. — Not completely preserved in any specimen ; 

 anterior branch curving gently inwards from the eye-lobe ; posterior 

 branch diverging outwards at a gentle curve to the posterior 

 angles. 



Test : Much weathered in all the specimens ; but with indica- 

 tions of having been relatively thick (see PI. XXVI, fig. 1 b) ; surface- 

 characters unknown. 



Feee cheeks : There are several free cheeks [372, 374, 375] 

 to be seen on the same hand-specimens with the cranidia. They 

 agree with them in size, in the character of the weathered test and 

 in the contour of the rounded margin, which is prolonged backwards 

 into a short spine of circular section. Specimen [372] (PI. XXVI,. 

 fig. 2) shows the curves of the eye and of the facial suture, and I 

 have very little hesitation in referring it to the species. The area 

 of the cheek is separated from the rounded margin by a distinct 

 hollow, and rises in a gentle convex curve to the place of the eye. 



This species seems nearest to Liostracus valid us Matthew, and it 

 is also not far removed from L. linnarssoni Brogger ; but from both 

 it differs in the relative length of the glabella. The graceful curves- 

 of the cranidium suggest the specific name. 



Locality and horizon. — The upper section on the Shoot- 

 Rough Road, Comley ; from the ochreous band near the top of the- 

 Shoot- Rough-Road Flags. 



Ptychopaeia (Liosteactjs) sp. indet. (PI. XXVI, figs. 4a-4c.) 



A form allied to Ft. (L.) pulcJiella occurs at a considerably lower 

 horizon, which I call the Hill-House Grits. The only specimens- 

 that I have seen are, however, badly preserved, and it is impossible 

 to give a detailed description of them. 



As the figures show, this species or variety is less convex and 

 has a wider and longer glabella than Ft. (L.) pulcJiella, also the 



