RHYNCHONELLA. 129 
6. RuyncHoneLLa Neapouirana, n. sp. Pl. XV, figs. 4, 4a, 4b. 
Cf. 1858. RuyncHONELLA FLEXISTRIA, Davidson. Brit. Foss. Brach., vol. ii, pt. 5, 
p. 105, pl. xxiv, figs. 1—8. 
Description.—Shell of moderate size, sub-globose, sub-circular. Beak ? 
Dorsal valve swollen, convex in contour, bearing a strong median fold. Ventral 
valve less convex than dorsal valve. Ribs, about twenty-six, sharp, deep, 
largest on the fold, rather irregular and arching on the sides, extending 
to umbones. Front margin convex. 
Size.—Length, 23 mm.; width, 23 mm.; depth, 16 mm. 
Locality.—There is a single specimen from Newton in the Museum of Practical 
Geology. 
Remarks.—I have failed in referring this elegant shell to any known Devonian 
species. Perhaps the shell it most resembles is Rh. subcuboides from Lummaton ; but 
from that it differs (I think specifically) in its size, in the sharpness of the ribs, and 
in the ribs reaching to the umbones. It appears to bear considerable resemblance to 
the Carboniferous Rh. flewistria, Phillips, but to have more equal and simple ribs. 
Mons. Céhlert informs me that Rh. Gosseleti' differs from it by having fewer 
and dichotomising ribs. 
The trivial name is from the classic form of the word ‘“ Newton.” 
7. RHYNCHONELLA PARALLELEPIPEDA, Bronn, Pl. XV, figs. 10, 10a. 
1835. TEREBRATULA PARALLELEPIPEDA, Bronn. Leth. Geogn., vol. i, p. 71, pl. ii, 
figs. 11 a—d. 
18538. — anautosa, Steininger. Geogn. Beschr. Eifel, p. 59, pl. ve 
figs. 6 a—e. 
1854. a ANGULOSA, Schnur. Palewontographica, vol. iii, p. 185, pl. 
xxv, figs. 5a, 6. 
1854. — SUBCORDIFORMIS, Schnur. Ibid., p. 186, pl. xxv, figs. 6a—e, 
h—k (only). 
1865. RHYNCHONELLA PRIMIPILARIS, Davidson. Brit. Foss. Brach., vol. iii, pt. 6, 
p- 66, pl. xiv, figs. 4—6. 
1882. — PARALLELEPIDA, Davidson. Ibid., vol. v, pt. 1, p. 42. 
1882. — PARALLELEPIPEDA, Barrois. Mém. Soc. Géol. Nord, vol. ii, 
p. 266. 
1885. -— — Maurer. Abbandl. Grossh. Hessisch. 
Geol. Landes., vol. i, pt. 2, 
p- 194, pl. viii, figs. 16, 16 a. 
1885. — SUBCORDIFORMIs, Maurer. Ibid., p. 195, pl. viii, figs. 
17, 174. 
1 1893, Giblert, ‘ Ann. Soc. Géol. Belg.,’ vol. xx, p. 125, pl. iii, figs. 5—7. 
VOL. Il. iy 
