Prof. T. R. Jones and Dr. Woodward—Devonian Fossils. 387 
the casts show ; in some cases, however, the marginal rim is more 
distinct. : 
Figs. 4 a—d. These show the cast of a very large and much 
squeezed carapace (7-5 mm. long; the hollow mould is 8 mm., having 
more marginal rim behind). The valves have been lengthened and 
compressed (Figs. 4 6, c), the lobes stretched obliquely, and the 
curved ventral junction obliterated (Fig. 4a). The results of 
pressure and the lower scale of magnifying give this specimen an 
appearance very different from that of Fig. 3. 
Figs. 5 a, b, show a neat and smaller cast (3 mm. long) of the 
same species, but modified by pressure (from above downwards and 
obliquely), so that the length of the valve has been increased, the 
height lessened, the lobes thrown into an oblique position (as also 
seen in Fig. 4a), the ventral curve almost obliterated, and by a 
longitudinal wrinkle or small fold (not well shown in Fig. 5a) the 
large pyriform lobe is puckered all along its postero-ventral region. 
The result of these changes is that the modified valve looks almost 
like a variety of B. Kledeni, M‘Coy; but the evident effects of 
pressure are all that separate it from the more typical forms, such 
as Fig. 3. 
As a new species we propose to call this form Buryricuta 
DEvontca. 
As is well known, Prof. Dr. Ferdinand Roemer some years ago 
noticed a large Beyrichia (about 4 mm. long) from the Devonian 
rocks of the Bosphorus. See his ‘‘Geognost. Bemerk. auf einer 
Reise nach Constantinopel,” etc. “« Neues Jahrb.” 1863, p. 521, pl. 5, 
figs. 8a, b. At p. 509 F. Roemer referred these fossiliferous rocks to 
the Middle and Upper Devonian; but M. de Verneuil (Bullet. Soe. 
Géol. France, 2 sér. vol. xxi. (1864), pp. 147-155) regarded them 
as of Lower Devonian age. In the Grou. Mac. Vol. VIII. (1870), 
p- 466, Prof. Dr. Ferd. von Hochstetter is cited as referring? them 
palzontologically to the horizon of the Lower Devonian beds of 
Western Europe, noting also that they contain some few Upper 
Silurian fossils. 
Roemer’s two little figures unfortunately do not allow us to offer 
an opinion as to the specific characters of his Beyrichia from the 
Bosphorus. It may or may not be related to our species from 
Torquay. 
The new Beyrichia from Devonshire has been alluded to in the 
Ann. Mag. Nat. Hist. ser. 6, vol. ii. 1888, p. 299, by the Rev. G. F. 
Whidborne, F.G.S., and is there said to have been found by Mr. T. 
Roberts, Mr. Solly, and other members of Professor T. McKenny 
Hughes’s Cambridge party during their visit to Torquay in the 
! The Turkish Beyrichie above mentioned are briefly noticed also by Mr. W. R. 
Swan, in the Quart. Journ. Geol. Soc. vol. xx. (1864), p. 116. 
* In his Geological Conditions of the Eastern Part of European Turkey, Jahrb. 
der K.K. geol. Reichsanstalt, vol. xx. 1870. 
3 This specimen, collected by M. A. Dumont, was sent to Dr. Ferd. Roemer by 
M. G. Dewalque, who, having the care of the Museum of the Liége University, has 
allowed us to see the specimen. It is closely allied to, if not the same as our B. 
Devonica. 
