PLATE XXIV. 



UPPER SILURIAN CRUSTACEA. 



Order — Merostomata. 



Sub- Order — Eu rypterida . 

 Fig. 

 1. Styhnurm Logani, H. Woodw. (P. 129.) Drawn of the natural size, from the 



specimen in the Museum of Practical Geology, Jermyn Street. The Counterpart 



is in the Collection of James Powrie, Esq. From the Upper Silurian, Lesma- 



hagow, Lanarkshire. 



Miscellaneous Specimens. 



2 — 6. Represent the specimens described by Mr. J. W. Salter, under the name of 

 Enrypterus mammatus, from the " Eerny Metal," Coal-measures, Pendleton 

 Colliery, Manchester. (Seep. 1G3.) 



2 and 3 are referred to M. Jordan's genus Arthropleura, under the name of A. main mat a. 



(See p. 107.) 

 4, 5, and G are referred to Plant-remains by Mr. Carruthers. (See p. 168.) 



