174 Dr. F. R. Coiviier Reed — 



Chonetes a£E. buchiana De Koninck. (PI. II, Fig. 16.) 

 Another species of Chonetes is represented by the internal cast 

 of a pedicle-valve and the interior view of the same valve. The 

 ribs, which are comparatively few (about twenty to twenty-five in 

 all), and coarse, are equally and widely spaced, and show faintly 

 through the substance of the shell, and the two pairs of muscle-scars 

 are distinct. The valve is gently convex, slightly flattened near the 

 cardinal angles, which are rectangular, and the beak is small and in- 

 conspicuous. There are several small, short, cardinal spines along 

 the hinge-line. The shell measures about 8 mm. in width and 5 mm. 

 in length. The species is probably allied to, if not identical with, 

 Ch. huchiana De Kon.' 



Chonetes sp. 

 There is the cast and impression of the pedicle-valve of another 

 small Chonetes, which is distinct from that above described. It is 

 transversely subtriangular and fusiform in shape, with acutely 

 pointed and somewhat produced lateral angles, and is widest along 

 the hinge-line. The median portion of the valve is strongly convex, 

 and rises rather suddenly from the depressed lateral portions. The 

 cardinal angles are pointed at about 45 to 60 degrees ; the beak is 

 obtuse and small, and scarcely projects over the hinge-line. The 

 surface of the valve is covered with rather coarse, though small, 

 rounded riblets, about thirty-five to forty in number. The internal 

 cast shows rather large and widely separated pustules arranged in 

 radial lines, and there are traces of narrow elongated muscle-scars. 

 There are indications of the bases of a few small cardinal spines 

 along the hinge-line. Dimensions : width, 8'5 mm. ; length, 

 4"5 mm. The shape of our shell recalls Leptcena convoluta Phill.^ 

 from the Devonian of Croyde Bay, which McCoy * records from the 

 Carboniferous of Ireland. Loczy's Chonetes Flemingi var. gohica,^ 

 from the Carboniferous of China, may also be compared. 



Proetus cf. coddonensis Woodward. (PL II, Fig. 17.) 

 DescrijJtion. — Pygidium transversely semicircular. Axis strongly 

 convex, broad, about one-third the width of the pygidium and 

 three-fourths its length, composed of seven complete rings with 

 narrow, lateral portions indistinctly marked off by weak longitu- 

 dinalfurrows; tip bluntly pointed. Pleural lobes somewhat flattened, 

 with four distinct pleurae on each side (and traces of a fifth), and a 

 half-pleura on each front edge ; pleurae radiating, straight, extending 

 nearly to the margin of pygidium, successively decreasing in strength 

 and length posteriorly, with raised subangular surface bearing 

 a fine median furrow ; interpleural furrows well marked. Fine weak 

 marginal furrow, indistinctly separating off a rounded border. 



1 De Koninck, Anim. Foss. Garb. Belg., 1842-51, p. 208, pi. xii, figs, la-lc. 



2 Phillips, Palceont. Foss. Cornw. Dev., p. 57, pi. xxiv, fig. 96. 



3 McCoy, Syn. Garb. Foss. Irel, p. 119. 



4 Loczy, op. cit., p. 77, t. iii, fig. 14, text-fig. 15. 



