498 Dr. Nicholson — On Plants in the Skiddato Slates. 



occur in the Skiddaw Slates, and as this exhibits no structure, it is 

 safest to leave its position an open question. 



Loc. — Lower beds of the Skiddaw Slates, Eake Beck, near 

 Melmerby. 



In addition to the above-described obscure but interesting fossils, 

 the Skiddaw Slates yield numerous specimens which might be re- 

 ferred to the genus Palcsojpliycus of Hall. I should, however, be cer- 

 tainly disposed to think that most, if not all, the fossils referred by 

 Hall and Billings to this genus are truly of the nature of worm -tracks 

 and Annelide-burrows. 



Having recently obtained several new forms from the Skiddaw 

 Slates, I may conclude with a list of the fossils known to me as oc- 

 curring in this formation. 



LIST OF FOSSILS FEOM THE SKIDDAW SLATES. 



Crustacea. 



^glina binodosa, Salt. 



,, caliginosa, Salt. 

 Agnostus Morei, Salt. 

 Caryocaris Wrightii, Salt. 

 Leperditia (?) 

 Ogygia (?) 



Phacops Nicholsoni, Salt. 

 Trinucleus Gibhsii, Salt. 

 Annelida. 



Tracks and burrows [ArenicoUtes, 

 Scolites, and Helminthites.') 

 Beachiopoda. 

 Discina (?) 



Lingula brevis, Portl. 

 Htdrozoa {Graptolitidd). 



Climacograpsus antennarius, Hall. 

 ,, bicornis, Hall. 



,, teretiusculus, His. 



Dendrograpsus Hallianus, Prout. (?) 

 Dichograpsus annulatus, Nich. 

 „ fragilis, Nich. 



,, Logani, Hall. 



„ multiplex, Nich. 



,, octobrachiatus. Hall. 



,, retictilatus, Nich. 



Didymograpsus affinis, Nich. 



Didymograpsus bifidus. Hall. 



„ fasciculatus, Nich. 



„ geminus, His. 



,, nitidus, Hall. 



„ patulus, Hall. 



„ serratulus, Hall. 



,, sextans, Hall. 



„ V-fraetus. Salt. 



Diplograpsus armatus, Nich. 



„ nopkinsoni, Nich. 



„ mucronatus, Hall. 



,, pristiniformis, Hall, 



,, pristis, His. 



Fhyllograpsus Anna, Hall. 



„ angustifoUus, Hall. 



,, typus, Hall. 



Pleurograpsus (?) vagans, Nich. 

 Tetragrapsus bryonoides. Hall. 



„ crucifer, Hall. 



„ Seadi, Hall. 



„ quadribrachiatus, Hall. 



Trigonograpsus lanceolatus, Nich. 

 PlANTjE (?) 



Buthotrephis, Harhnessi, Nich. 



„ (?) radiata, Nich. 

 Eophyton (?) palmatum, Nich. 

 Chondrites (?) 



EXPLANATION OF PLATE XVIII. 



Fig. A. — Buthotrephis Harhnessi, sp. noT. nat. size. 

 Fig. B. — ,, (?) radiata, sp. nov. „ „ 



Both from the upper beds of the Skiddaw Slates, Thornship Beck, 



near Shap. 

 Fig. C. — Eophyton (?) palmatum, sp. nov. nat. size. From the lower beds of 



the Skiddaw Slates, Barff, near Keswick. 

 Fig. D. — Chondrites (?), nat. size. From the lower beds of the Skiddaw Slates, 



Eake Beck, near Melmerby. 



