Wyatt-Edgell—On a New Species of Lickas. 161 



and Caradoc groups. At the time this seemed a bold assertion, con- 

 sidering the great number of genera which were then thought to 

 originate in the latter, not being known in the former. Some new 

 forms, however, that have lately come to light from the Llandilo 

 flags, show the connection between the two strata to be closer than 

 it formerly appeared. 



When on a tour last autumn through South Wales, I was so 

 fortunate as to find the following trilobites in the Llandilo strata :— 

 A new species of Phacoj)s (which I believe Mr. Salter intends 

 to describe under the name P. conatus), new species of Proetus, new 

 species of Trinucleus, and Lichas patriarcJius new species. The 

 last fossil is described below. Besides these trilobites, there are 

 in my collection some mollusca and minor things from the same 

 formation, which make an important addition to the known British 

 fauna of that period. I here give a list of them : — Endoceras, new 

 species, Helicotoma, or OpJiileta, new species (these two I hope to 

 describe before long, naming them respectively E. Eoum and H. 

 Anglica), Orthoceras subundulatum (?), Trematis (?) new species, Bhyn- 

 conella species, StropTiomena (common but unnamed species), OrtJiis 

 crispa, 0. testudinaria, 0. insularis, 0., species something like 

 insularis, Palcearca species (like P. hullo), Modiolopsis, two new 

 species, Ctenodonta species, C. varicosa, Beyrichia complicata, a Crinoid 

 (the Bhodocrinus f quinquangidaris of the list in appendix to 

 "Siluria"), Phyllopora species, and I may add Heterocrinus (?), of 

 which I have seen a fine specimen in the collection of Mr. Eskrigge, 

 of Liverpool. It is through the kindness of this gentleman in lend- 

 ing me his specimens, that I am enabled to figure the anterior 

 margin of the head and the restored tail of Lichas patriarchus, 

 of which fossil he was the first discoverer. The portions of it in his 

 possession, as well as those in my own, were obtained from. Pont 

 Ladies quarry, Llandilo ; where they were associated with AsapJius 

 tyrannus, Calymene Cambrensis, and most of the common Llandilo 

 forms. I subjoin a description of this new form. 



Anterior margin of the head a semicircle; central lobe of glabella 

 gibbous, and of a truncate outline ; first or anterior pair of lobes 

 slightly convex, curved so as to partly encircle the second lobes. 

 The eyes placed on the outer edge of the latter, which reach the 

 neck-furrow and enclose between them the triangular third, or neck 

 lobes, four-thirds their own breadth apart. 



The length of the glabella is five-sixths its breadth, measured from 

 eye to eye. The central part is suddenly widened at the posterior 

 end, owing to the incompleteness of the first pair of furrows, which 

 do not reach the second lobes, but terminate in half loops at about 

 one-eighth the length of the glabella from the neck-furrow. The 

 first lobes almost reach the anterior margin of the head and termi- 

 nate in obtuse spherical angles, of which one side is enclosed by 

 the central part, this being very wide anteriorly, though narrow 

 between the base of the lobes (two-thirds of their breadth). 



The second furrows are nearly parallel from the sharp anterior 

 angles of the centre of the glabella to the lanceolate extremitiee of the 



vol,. III. — NO. XXII, 11 



