134 DEVONIAN FAUNA. 
C. rhomboidea ; but he ultimately came to the conclusion that the shell which 
he figured seemed to belong to a “‘ distinct and well marked species.”” My other 
Specimens (several of which are equally fine) bear out this view. They are 
totally different from C. Lummatonensis, with which Kayser and Maurer would 
unite CO. rhomboidea, while the differences which will be noted under the latter 
head seem to prove that they are clearly separable from that shell also. 
A shell figured by Schnur, and doubtfully referred to his Rh. bijugata, appears 
to me to belong to the present species. 
5. Sub-genus.—Witsonta, Quenstedt, 1871. 
1. Witsonta cusorpEs, Sowerby, sp. Pl. XV, figs. 6, 6a. 
1840. Arrypa cunorpEs, Sowerby. Geol. Trans., ser. 2, vol. v, pt. 3, pl. lvi, fig. 24. 
? 1854. RuyncnoneLLa puaNnorpEs, Schnur. Paleontographica, vol. iii, p. 177, pl. 
xxiii, figs. 5 a—e. 
1865. — cuBorDEs, Davidson. Brit. Foss. Brach., vol. iii, pt. 6, 
p- 65, pl. xiii, figs. 17—21. 
1882. — = — Ibid., vol. v, pt. i, p. 46, pl. ii, figs. 
18/19: 
1884, — — Clarke. Neues Jahrb. f. Min., Beil.-Band iii, 
p. 385. 
1885. _ “= Maurer. Abhandl. Grossh. Hessisch. Geol. 
Landes., vol. i, pt. 2, p. 199, pl. 
vill, figs. 283—25 6. 
1885. oo puenorpEs, Maurer. Ibid., p. 203, pl. viii, figs. 29, 29a. 
1887. — cuBOIDES, Tschernyschew. Mém. Com. Géol., vol. iii, pt. 
3, p- 93, pl. xiv, figs. 1 a—d. 
1891. — —- Whiteaves. Contrib. Canad. Paleont., vol. i, 
pt. 3, p. 231. 
Localities.—It is abundant both at Lummaton and Barton and at Wolborough ; 
from the former place about eighty specimens are in my Collection, eight in the 
Woodwardian, one in the Torquay Museum, three in the Museum of Practical 
Geology, one (figured by Phillips, fig. 152, and by Davidson) in the British Museum, 
five in the Museum of the Geological Society (including Phillips’s figured specimen 
of Lh. crenulata), and eight in the Bristol Museum. From Wolborough there are 
twenty specimens in Mr. Vicary’s Collection, four in the Torquay Museum, 
sixteen in the Museum of Practical Geology, and two in the British Museum. 
Remarks.—It is to be observed that the present species is undoubtedly the 
true Ith. cuboides of Sowerby and Davidson, and that foreign specimens must 
stand or fall (as species) according to their agreement with it. 
I fully agree with Davidson’s view that the A. impleta and A. crenulata of 
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