Case and 
Column of 
Drawers. 
UPPER LUDLOW AND DOWNTON SANDSTONE. 189 
Reference to McCoy's 
Synopsis : and Figures of Genera. 

Gg 




Pl. 15, fig. 2, p. 135. 
Gea) 
eB 
a0) 
Worm-tracks. 
Pl. 1 D, fig. 14, p. 130. 



Names and References; Observations, &c. 
Numbers and Localities. 

Pterygotus gigas, Salter (Mem. Geol. 
Sury. Mon. 1, pl. 9), 6 or 7 ft. long. 
Pterygotus Banksii, Salter (Siluria, 
3rd ed. p. 239). A small species. 
Hemiaspis, one or two species. 
CRUSTACEA. Phyllopoda. 
Beyrichia Klodeni, McCoy. 
abundant. 
Very 
Leperditia marginata, Keyserling ? 
CRUSTACKA. Trilobita. 
Trilobites are excessively rare, and 
Echinodermata and corals quite ab- 
sent. The inhabitants of a sandy 
shore and such spoils of neighbour- 
ing Jands as might be preserved on a 
shallow coast-line are all we can 
expect. 
ANNELIDA. 
Crossopodia, McCoy. The deep trail 
of a large worm. Annelids were 
gigantic in Silurian times. One 
(Beatricea) 30 feet in length! and 
thick as a man’s thigh (Logan). 
Crossopodia lata, McCoy. The trail of 
the body is very distinct from that 
of the cirri or lateral appendages. 
BRACHIOPODA. 
Brachiopods except Lingula are very 
rare. 

Kington. 
Ludlow. 
Ludlow and S. Wales. 
b. 157, Storm Hill, Llan- 
deilo. 
