42 FOSSIL CIRRIPEDIA. 
enlargement of the fixed scutum and tergum, is due to the development of a single small 
portion in each valve, namely, the lower ridge of the articular ridges by which these 
valves are united together. It is very remarkable that in all the species it seems to be a 
matter of chance, whether the right or left hand valves undergo this singular modification ; 
consequently, of every valve it is equally likely to find a right-hand or left-hand specimen ; 
and these, though exactly alike, except in being reversed, or in coming from opposite sides 
of the body, yet, from this very circumstance, and from the fixed valves being of very 
irregular shapes, are rather perplexing to identify. This short description will, I hope, 
suffice to make the following descriptions intelligible. 
1. Verruca Stromia. ‘Tab. II, fig. 9a, 9d. 
Lepas Stromia. O. Miiller. Zoolog. Dan. Prod., No. 3025, 1776. 
— — Ib. Zoolog. Dan., vol. iii, Tab. 94, 1789. 
— srriata. Pennant. British Zoology, vol. iv, Tab. 38, fig. 7, 1777. 
DIE WARZENFORMIGE MEEREICHEL. Spengler. Schriften der Berlin. Gesell., 1 B 
Tab. 5, fig. 1—3, 1780. 
Lepas verruca. Spengler. Skrifter af Naturhist. Selskabet, 1 B., 1790. 
— a ET StRoMIA. Gmelin. Syst. Nat., 1789. 
BaLanus veRucA. Bruguiére. Encyclop. Meth., 1789; Clisia verrucosa, Deshayes, in 
Tab. 
—  InterTEXxtTUs. Pulteney. Catalogue of Shells of Dorsetshire, 1799. 
Lepas striatus. Montagu. Test. Brit., 1803. 
— vprruca. Wood’s General Conchology, Pl. 9, fig. 5, 1815. 
Verruca Stromit. Schumacher. Essai d’un Nouveau Syst. Class., 1817. 
CREUSIA STROMIA ET VERRUCA. Lamarck. Animaux sans Vertébres, 1818. 
OcutHosia StROEMIA. Ranzani. Memoire di Storia Nat., 1820. 
Crista striata. Leach. Encyclop. Brit. Suppl., vol. iii (sine descript.), 1824. 
Cuitra verruca. G. B. Sowerby. Genera of Recent and Fossil Shells, Plate. 
Verruca Stromu. J.£.Gray. Annals of Philosophy (new series), vol. x, Aug. 1825. 
ed 
V. scuto mobili, cristéd articulari inferiore dimidiam brevis criste articularis superioris 
latitudinem non equante : testa plerumque longitudinaliter sulcata. 
Moveable scutum, with the lower articular ridge not half as broad as the short upper 
articular ridge: shell generally ribbed longitudinally. 
Fossil in Glacial deposits of Scotland, Mus. Lyell; Red Crag (Walton, Essex), Coralline Crag (Sutton), 
Mus. 8. V. Wood. 
Recent on the shores of Great Britain and Ireland; Shetland Islands; Denmark; Iceland; shores 
of northern Europe; Red Sea. Attached to shells, laminariz, rocks, crabs, and floating bark, from low 
tidal mark to fifty or ninety fathoms. 
I have seen a perfect specimen of this species from the Glacial deposits of Scotland, and 
nd "7 a 
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