F. R. Cowper Reed — Undcscribed TrUohites. 5 



HI. — WOODAVARDIAN MuSEUM NoTES : SaLTEr's UnDESCKIBED 



Species. II. 



By F. 11. CowPER Reed, M.A., F.G.S. 



(PLATE I.) 



LiCHAS scuTALis, Saltei*. (PI. I, Figs. 1-4.) 



1873. Llchas smfalis, Salter MSS. : Cat. Camb. Sil. Foss. Wooclw. Mm., p. 130 

 (« 9.54). 



1877. L'ichas vcrrHCosus, Woodward : Cat. Brit. Foss. Cnist., p. 43. 



1878. lAchas sciitalis, Edu'ell MSS. : Cat. Camb. Sil. Foss. Miis. Tract. Geo!., p. 84. 

 1891. Llchas vcrrxcosKs, Woods: Cat. Type Foss. Woodw. Mus., p. 147. 



rilHERE are three specimens of this species in the Woodwarfliaa 

 X Museum, viz. : (1) Salter's fine original specimen (a 954) from 

 "the Wenlock Shale of Malvern, belonging to the first part of the 

 Fletcher Collection, acquired prior to 1873; (2) a poor .specimen 

 probably from the same collection and horizon, locality unknown ; 

 and (3) an almost perfect specimen, also from the Wenlock Shale 

 of Malvern, belonging to that part of the Fletcher Collection 

 recently presented by Mrs. Fletcher. Tliis specimen will be 

 designated the Fletcher specimen in distinction to Salter's original 

 specimen. Both these specimens show almost the whole trilobite 

 preserved in excellent condition, and from them the following 

 ilescription has been drawn up. 



Diagnosis. — Head-shield broadly parabolic, nearly twice as broad 

 as long, and slightly produced backwards at genal angles ; strongly 

 convex from back to front and from side to side, slightly flattened 

 between the eyes across the middle portion of the posterior half; 

 anterior half of head-shield bent down very steeply to margin, 

 almost at a right angle to posterior lialf ; sides bent down as steeply 

 in front, but less steeply towards genal angles, where they flatten out. 



Glabella wide, occupying nearly whole middle third of head- 

 shield ; forms most elevated portion of head-shield, but is not 

 swollen nor raised with independent convexity above fixed cheeks. 

 Median lobe much expanded in front, its narrow laterally-projecting 

 tongues overlapping anterior lateral lobes ; constricted strongly at 

 level of anterior lateral furrow, behind which it gradually decreases 

 in width with nearly straight sides to the base of anterior lateral 

 lobes, where it again expands a little. Behind this point the median 

 lobe is only weakly marked off from the two pairs of posterior 

 lateral lobes, but is traceable in the Fletcher specimen to the 

 straight occipital furrow, where it has nearly double the width it 

 possessed between the anterior lateral lobes. 



Anterior lateral lobes large, of broadly oval shape, rather wider 

 in front than behind, where the furrow which defines them is very 

 faint. They extend about two-thirds the whole length of the 

 glabella with their longer axes obliquely directed inwards, and 

 with a gentle convexity of their own, bending down strongly in 

 front with the median lobe and at the sides with the general 

 curvature of the head-shield. In front they are separated from the 



