38 DEVONIAN FAUNA. 



mentation of the head being linear instead of tuberculated, and there are none in 

 which the tubercles are so regular and prominent. The only American Devonian 

 Bronteus, B. Tullius, Hall, 1 belongs to a different section of the genus. 



4. Bronteus alutaceus, Goldfuss. PL III, fig. 11. 



1839. Brontes flabellifeb (pars), Goldf. Nov. Act. Acad. Caes. Leop. -Carol., 



vol. xix, pt. 1, p. 361, pi. xxxiii, 

 fig. 3 a (pars) . 

 1843. Beonteus alutaceus, Goldf. Neues Jahrb. fur Min., p. 549, pi. vi, fig. 1. 

 ? 1850. — — Sandb. Verst. Rhein. Nass., p. 21, pi. ii, figs. 3 a — d. 



Description. — Tail with deep linear furrows, and ribs bearing numerous fine 

 tubercles, six or seven in the width of each rib. 



Locality. — Lummaton ; two specimens in my collection. 



Remarks. — The fragmentary specimen figured in Plate III appears exactly to 

 correspond, as far as it goes, with Goldfuss's species, and I have therefore no 

 hesitation in introducing it in spite of the scantiness of the material, as the only 

 question that remains is whether he is correct in regarding his B. alutaceus as 

 more than a variety of B. granulatus or some other species. An argument that he 

 is right may be found in the fact that Barrande has distinguished a large number 

 of species in Bohemia which are divided by quite as small differences. 



Sandberger gives a figure of a tail which appears much like that of Goldfuss, 

 though the granulation is rather coarser. He also figures a glabella which is very 

 similar in shape and general appearance to those which we have referred to B. 

 granulatus, but gives no evidence of granulation. Clarke 1 seems to consider these 

 figures distinct from B. alutaceus if not also from B. granulatus. His own figure, 

 however, is not much more like the latter than the former. 



B. alutaceus differs from the other British species in the much more numerous 

 tubercles of the tail, and from all except B. pardalios by the narrowness of its 

 furrows. 



5. Beonteus flabellifer (Goldfuss). PI. Ill, fig. 16. 



1832. Olenus flabellifer, Goldf. De la Beche's Handbook (German edition), 



p. 540. 

 1839. Brontes — — Nov. Act. Acad. Cses. Leop.-Carol., vol. xix, 



pt. 1, p. 361, pi. xxxiii, figs. 3 a (pars) and c. 



1 1888, Hall, ' Pal. N. Y.,' vol. vii, p. 12, pi. 8 a, figs. 31—36. 



2 1885, Clarke, ' Neues Jahrb.,' pt. 3, Beil.-Band, p. 323, pi. iv, fig. 1. 



