1853.] DAVIDSON — FOSSIL BRACHIOPODS FROM CHINA. 357 



external surface ornamented by a number of tubular spines irregu- 

 larly distributed. Shell-structure punctated. Length 8, breadth 

 9^ lines. 



Obs. — This species is so well known that it does not require any 

 lengthened description ; it varies much in the convexity or concavity 

 of its valves. Two specimens have been obtained at Kwang-si, 

 exactly similar to those found in the Devonian beds of Ferques, of 

 Belgium, Prussia, &c. According to Prof. King this shell would 

 belong to his genus Sti'opJialosia. 



5. Crania obsoleta, Goldfuss. Pl. XV. fig. 13. 



Crania obsoleta, Goldf. Petref. p. 297. tab. 163. f. 9. 

 Orbicula cimacensis, De Jijckholt (^JMelaJu/esPaleonioloc/iques), Acad. 

 Royale de Belgique, vol. xxiv. p. 92. pl. 4. f. 3, 4. 



Shell almost circular, inequivalve, more or less irregular from its 

 mode of attachment, which is by the entire surface and substance of 

 its lower valve ; upper valve patelliform, more or less convex, conical 

 or somewhat depressed, with its apex central or subcentral. Surface 

 smooth, interrupted only by a few lines or rugosities due to growth. 



Obs. — This Crania is very abundant at Kwang-si, where it is found 

 adhering to Spirifers, and is identically the same as that occurring at 

 Ferques and Nehou in France, in the Eifel, and in many other Devo- 

 nian localities ; it seems to be the one described by Goldfuss under 

 the name of C. obsoleta, and I am inclined to believe that the same 

 species has been subsequently described by the Baron de Ryckholt 

 under the name of Orbicula cimacensis, from that author stating that 

 his examples were obtained in the Eifel and from Ferques (these last 

 having been furnished by M. Bouchard) ; and since those found in 

 both these localities, as well as in China, are identically the same, I 

 must infer that all belong to one species, viz. the C. obsoleta of 

 Goldfuss; but none of these present the " stries rayonuantes" de- 

 scribed and figured by M. de Ryckholt, and I believe that the Bel- 

 gian author has mistaken the accidental reproduction of the striae 

 peculiar to the object of attachment for striae belonging to the orna- 

 mentation of the species. 



6. Spirorbis omphalodes?, Goldfuss, sp. Pl. XV. fig. 14. 



Serpula omphalodes (Goldfuss), Petref. vol. i. p. 225. pl. 67- f. 3. 

 Spirorbis Hoeninghausi, Stein. Mem. Soc. Geol. de France, vol. i. 

 p. 358. 



Shell orbicular, convex, subspiral, of one coil only, and transversely 

 wrinkled near the aperture. Diameter 1 line. 



Obs. — This fossil is abundant in the Devonian localities of Kwang- 

 si, Ferques, Gerolstein, &c., attached to S])irifers and other shells. 

 M. de Verneuil also mentions the species from Lake Ilmen, Volkof, 

 and Voroneje. 



2 B 2 



