34 DEVONIAN FAUNA. 



Size. — The specimens are too imperfect to permit any dimensions being given. 



Localities. — There are two heads in my collection from Wolborough and 

 Lummaton, one tail in the Woodwardian Museum from Wolborough, and another 

 in the British Museum from Lummaton. 



Remarks. — I group these specimens together with much doubt, but they 

 appear to agree in general character sufficiently well to give presumptive evidence 

 of their unity. The head approaches that of Bronteus tigrinus, of which it may 

 perhaps prove to be a variety. It chiefly differs from it in its more elongated 

 shape and its greater smoothness. The tail is distinguished, by the sphaeroidal 

 shape of its axis, its smoothness, and its wide central ribs, from any others that I 

 have been able to examine. 



Miinster's B. radiatus 1 seems not very dissimilar from the tails of this species. 

 He figures two specimens, which he says are very different. The larger of these 

 seems to be much more like B. intumescens, F. A. Roiner, 2 B. Brongniarti, Barr., 3 

 or B. Verneuili, CEhl. and Dav., 4 which are much more tumid and in other respects 

 dissimilar from the present one ; the smaller is more like ours, but both are said to 

 be marked by concentric lineations, of which there is no sign in the English species. 



In B. Haidingeri, Barr., 5 the glabella is entirely striated and the depressions 

 upon it do not reach the sides ; the axis of the tail is distinctly trilobed, and the 

 ornamentation of it of a totally different character from that in any English species. 

 B. Partschii, Barr., 6 which is like this species in general shape, has the head smooth 

 and the tail covered with striae. 



2. Buonteds tigrinus, n. sp. PI. Ill, fig. 12. 



Description. — Head short, very wide, rounded. Border slightly rounded in 

 front, indistinctly striated. Glabella widely triangular, narrow behind, almost 

 uniform in height till it curves rather suddenly to the border, which it reaches ; 

 bounded on each side by deep axal furrows, at first straight and then arching very 

 rapidly outwards, separating it from the fixed cheeks, and marked with two pits at 

 about one-fourth and two-thirds of its length from the border, from the first of 

 which a rounded depression parallel to the border runs almost across the glabella, 

 and behind it the frontal and ocular furrows form a smooth triangle on each side, 



1 1840, Miinst., ' Beitr.,' pt. 3, p. 40, pi. v, figs. 13 a, b. 



2 1852, F. A. K6m., ' Beitr.' pt. 2, p. 75, pi. xi, fig. 25. 



3 1852, Barr., ' Syst. Sil. Bohem,' vol. i, p. 866, pi. xlvi, figs. 1—12, Et. F and G. 



4 1879, Oehl. et Dav., ' Bull. Soc. Geol. Fr.,' ser. 3, vol. vii, p. 703, pi. xiii, fig. 2. 

 B 1852, Barr., ' Syst. Sil.Boh&m.,' vol. i, p. 875, pi. xlvi, figs. 32—39, Et. E. 



6 1852, Ibid., vol. i, p. 870, pi. xlvi, figs. 19—31, Et. E. 



