referred to the Cirripedia. 121 



wrightianus, 1 to the Cirripedia under the new genus Turrilepas, many 

 fossils from the Palaeozoic rocks have been referred to the Cirripedia 

 under the names Turrilepas, Plumidites, Lepidocoleus, and Strobilep>as . 

 While it is doubtful if certain of the fossils even belong to these 

 genera, it certainly still remains to be proved that any of them belong 

 to the Cirripedia. 



Strobilepas is known only by one species, S. spinigera, J. M. Clarke 

 (Fig. 4, p. 1 14), 2 based on a single specimen from the Middle Devonian 

 (Hamilton Group) of New York, and in this specimen the plates are 

 somewhat displaced. J. M. Clarke (1888, p. Ixiii) has given a 

 restoration of it, and from this we learn that there are four columns 

 of plates, of which the outer two are large and of equal size. One of 

 the two intervening columns consists of a few very small plates, and 

 the other is modified into a series of spines, which lie opposite the 

 series of small plates. The apical extremity is terminated by a circular, 

 conical plate, against the sides of which lies the first plate in each 

 column. It appears to form a completely enclosed shell, and is less 

 like a Cirripede than the other genera, for if it be a Cirripede it 

 is difficult to imagine where the cirri could have protruded in search 

 of food. 



Lepidocoleus is known by several species, namely the genotype 

 L. jamesi, z Hall & Whitfield (originally described as Plumulites jamesi i ) i 

 from the Hudson River Group of Cincinnati, L. sarlei, 5 J. M. Clarke 

 (Fig. 5, p. 114), from Niagara Shales of New York, L.polypetalus* J. M. 

 Clarke, from the Lower Helderberg Group of New York, L. illinoiensis,'' 

 Savage, from the Upper Oriskany Group of Illinois, and a species, 

 L. suecicus, 8 recently described by Professor <T. C. Moberg from the 

 Upper Ordovician of Sweden. The genus is represented also to my 

 knowledge in the Wenlock Beds of Dudley, in the Ordovician of 

 Eohemia, and in the Middle Devonian of Moravia. The record from 

 Bohemia is based on four plates in the Geological Department of the 

 British Museum, accompanied by one of Barrande's original labels, 

 which reads " Squamida bohemica, Barr. D-. Mt. Kosow". Barrande 

 states in his Monograph (Syst. Silur. Boheme, vol. i, Snppl., p. 565, 

 1872) that in 1856 certain fossils were distributed to the British 

 Museum under the generic names Plumidites, Anatifopsis, and 

 Squamida. He later, however, considered that there were two generic 

 types only, not feeling justified in retaining the proposed genus 



1 De Koninck, Bull. Acad. Sci. Belgique, ser. II, torn, iii, p. 190, 1857. 



2 J. M. Clarke in Hall & Clarke, Palcsont. Neiv York, vol. vii, p. 212, 

 pi. xxxvi, figs. 20-2, 1888. 



3 C. L. Faber, Journ. Cincinnati Soc. Nat. Hist., vol. ix, p. 15, pi. i, 

 figs. A-F, 1886. 



4 J. Hall & K. P. Whitfield, Geo!. Surv. Ohio, Paleontology, vol. ii, p. 106, 

 pi. iv, figs. 1, 2 (non fig. 3 = Turrilepas wrightiana), 1875. 



5 J. M. Clarke, Amer. Geol, vol. xvii, p. 143, 'pi. vii, figs. 1-6, 1896. 



6 Ibid., figs. 7-8. 



7 T. E. Savage, Amer. Journ. Sci. (4), vol. xxxv, p. 149, figs. 1-3, 1913. 



8 J. C. Moberg, " Om Svenska Silurcirripeder " : Kongl. Fysiogr. Sallsk. 

 Handl., N.F., Bd. xxvi, No. 1, p. 13, pi. ii, figs. 1-11, 1914. Since the present 

 paper was sent to press Professor Moberg has published some additional notes, 

 Geol. Foren. Stockholm Forhandl., Bd. xxxvi, Hft. vi, p. 492, 1915, which in 

 no way affect what is here written. 



