ON THE FOSSIL FHYLLOrODA OF THE 1'AL.EOZOIC ROCKS. 79 



portion nearly one-sixth of the entire circumference. A larger specimen 

 folded together probably measured 14 lines in diameter, ' Quart. Journ. 

 Geol. Soc' vol. xxii. p. 504. 



Found in the Anthracitic Shales of the Moffat district, at Dobbs Linn, 

 Dumfriesshire, and Garpoolburn, Moffat ; and in equivalent Silurian beds 

 at Coalpit Bay, co. Down, Ireland. 



2. Discinocaris dubia (F. A. Roemer), 1850. Aptyhus dubius, F. A. 

 Roemer ('Palfeontographica,' vol. iii. part 1, p. 23, t. 4, f. 18). Spathio- 

 cans dubia, J. M. Clarke, ' Neues Jahrb. fiir Min.' &c, 1884, vol. i. pp. 

 129 and 183. 



Nearly circular when perfect, but somewhat narrowed posteriorly, 

 thus becoming short-obovate. Notch rather shallow. Originally about 

 25mm. long, 24 mm. at the widest; slope of nuchal suture, 30°. Con- 

 centric lines wide apart, as preserved, and otherwise obscure at the 

 centre. This is referred by Mr. J. M. Clarke to his genus Spathiociiris. 



Roemer's specimen was found in the Goniatite-limestone of the 

 Kelwasserthal, in the Hartz. 



3. Discinocaris lata (H. AVoodward), 1882. Cardiocaris lata, H. Wood- 

 ward, ' Geol. Mag.,' Dec. 2, vol. ix. p. 388, pi. 9, fig. 13. Spathiocaris 

 lata, Clarke,' Neues Jahrb. fiir Min.' &c, 1884, vol. i. p. 181, pi. 4, fig. 2. 



Shield broadly obovate, nearly circular, with broad and deep cephalic 

 notch; not indented behind. If complete, it would be about 22 mm. 

 loug, 18 mm. wide. Slope of notch-sides about r 45°. As far as the 

 fig. 13 shows, this may be a Discinocaris. 



From Budesheim, in the Upper Devonian of the Eifel. 



In Mr. Clarke's paper this appears as having a round shield, slightly 

 broader anteriorly than behind; with a wide notch reaching to the centre. 

 Length (complete) about 19 mm. according to the figure, width 19 mm. 

 Slope of notch uncertain, probably about 50°. 



Not rare in the Upper Devonian, at Bicken, near Herboi-n, in Nassau. 



4. Discinocaris triasica (Reuss), 1867. AspidocarU triasica, Reuss, 

 'Sitzungsb. k. Akad. Wissensch. Wien,' math.-nat. CI., vol. lv. 18G7, 

 pp. 1 et seq. pi. O, f. 1-5. 



As Dr. Woodward has already intimated ('Geol. Mag.,' Dec. 2, vol. ix. 

 p. 386), there is apparently no real difference between the late Dr. A. E. 

 von Reuss's genus here mentioned, and Discinocaris, to which Reuss 

 thought it to be closely allied. Reuss's specimens indicate, however, a 

 different species. It was oval in outline, when perfect, and had a wide 

 and deep notch, with its apex near the centre of the test. The dimen- 

 sions of the fossils are somewhat increased by forcible depression of their 

 original somewhat conical form : fig. 2, length about 36 mm., width 

 about 29 mm. ; fig. 3, length about 25 mm., width about 19 mm. The 

 slope of the nuchal suture is 40° in the fossils, but Dr. Reues was pro- 

 bably right in restoring it at 50° (fig. 4). 



From the Raibl beds, near Hallstadt. 



5. Discinocaris sp. nov. 



In the Cambridge Museum we notice a PhyJlopodous test, broadly 

 sagittate, or sharp-shovel-shaped, in its present state, the cephalic portion 

 being absent. Originally obovate, with a narrow pointed posterior 

 margin, it has been truncated in front by a nuchal suture of slight 

 angularity, which has left a broad shallow re-entrant angle, with its apex 

 reaching back about one-third of the shield's original length, and its 

 sides reaching the margin almost before they run into the curve of- the 



