64 DEVONIAN FAUNA. 



pattern may have been superficially super-imposed by a mantle. Occasionally the 

 cast shows indications of the sinus-band by an obscure elevation. 



Affinities. — The casts of Salpingostoma ? macromphalus, F. A. Romer, sp., from 

 Kingdon's, Shirwell, are somewhat similar to this species, though their possession 

 greatly and rapidly expanding lips, which makes it probable that they are identical 

 with the smooth-shelled German fossil, clearly distinguishes them ; and the present 

 shell also differs in being much higher and more definitely globose. It seems to 

 me that they are undoubtedly distinct. 



This species sufficiently approaches d'Archiac and de Verneuil's version^ of 

 Bellerophon tuherculatus, de Ferussac, to raise the question whether it might not 

 be identical. On referring, however, to d'Orbigny's^ description and figures it is 

 at once seen to be distinguished by the much finer and less moniliform character 

 of its ornament. In the latter shell the tubercles are definite, and though a 

 quincuncial arrangement is mentioned, the elaborate zigzaging of the inter- 

 mediate furrows is hardly if at all apparent. It is also a much larger shell, and 

 its whorls seem to increase somewhat less rapidly. 



3. Bellerophon subglobatus, M^Coij. Plate VIII, figs. 3, 3 a. 



1841. Belieeophon globattjs ? Phillips (not Sowerhy). Pal. Foss., p. 108, 



pl.xl, fig. 202 a— 5 



1854. — — PacU. Dev. Kalk. Livland, p. 206. 



1855. — SUBGLOBATUS, M'Coy. Brit. Pal. Foss., p. 400. 



1858. — GLOBATus, Pacht. In Baer and Helmersen's, Beitr. Russ. 



Eeiches, vol. xxi, p. 102. 



Description. — Cast of shell small, globose, horizontally symmetrical, apparently 

 of numerous, slowly increasing, involute whorls. Whorls generally very much 

 flattened on the back and deeply convex on the sides, but occasionally sub-angular 

 on the back and obliquely flattened on the sides. Umbilicus very small and deep. 



Size. — Height 9 mm., diameter through sinus-band 7 mm. 



Locality. — In the the Barnstaple Museum are four specimens (including 

 a slab with indeterminate fragments) from Sloly, and four from Baggy Point. In 

 the Museum of Practical Geology are six from the Marwood Beds, and eight from 

 Shirwell (Marwood Beds). In the Woodwardian Museum is one from Baggy 

 Point. 



Remarhs. — These specimens are all casts in soft brown sandstone, and hence 



1 1842, D'Archiac and de Verneuil, ' Geol. Trans.,' ser. 2, vol. vi, pt. ii, p. 353, pi. xxviii, fig. 9. 

 3 1840, de Ferussac and d'Orbigny, ' Hist. Nat. Ceph.,' p. 191, (Bellerophon) pi. i, fig. 10, and 

 pi. iii, figa. 7—10. 



