64 Lingula Flags. 



Hymenocaris vermicauda, and the bivalve crustacean 

 Leperditia bupestris. Various annelids are found, 

 Cruziana, &c., and in the higher part of the strata 

 Polyzoa, of the genus Fenestella, together with a few 



FIG. 16. 



Hymenocaris vermicauda. Orthis lenticularis. 



Group of Lingula Flag Fossils. 



brachiopoda of the genus Orthis, 0. lenticularis and 

 others, Obolella sagittalis and maculata, and Discina 

 labiosa, three species of Theca (pteropods), &c. 



Of the fossils of this formation Pi otospongia fenes- 

 trata is common in the strata from the Cambrian to 

 the Lower Lingula flags, Agnostus Davidis and A. 

 scutalis, Anopolenus Henrici, A. Salteri are also 

 found in the Menevian beds, together with Conocoryphe 

 applanata, and C. humerosa, both of which begin in 



