150 DEVONIAN PAUNA. 



Size. — A specimen in tlie Torquay Museum, measuring 75 mm. in length, is 

 17 mm, in width at the lower, and 25 mm. at the upper end. 



Locality. — Wolborough. One of Phillips's figured types is in the Museum of 

 Practical Geology. There are also four specimens in Mr. Vicary's Collection, and 

 one in the Torquay Museum. 



BemarJcs. — The smoothness of the species is certain, as a small fragment of the 

 external shell, exposed in Phillips's type-specimen after it was drawn, remains 

 and shows absolutely no markings. Hence it differs from Sowerby's 0. cinctum^ 

 which he described in 1829 and stated to be covered with " fine, undulating, raised 

 lines," and which, according to Foord,^ is also the 0. cinctum of Miinster,^ as well 

 as the 0. cinctum of Phillips's ' Geology of Yorkshire.'* The type specimen of 

 the latter shell is in the British Museum, and shows clearly the regular undulating 

 ornamentation. On the other hand, 0. speciosiim, Miinster, is evidently very 

 similar to the Eoglish fossils. The septa of Miinster's shell are perhaps slightly 

 closer in one of his figures ; Mr. Foord states them to be from one half to one 

 quarter of their height. This, however, would include the measures of the present 

 species, and its rate of tapering also seems, upon the whole, to agree, although 

 in some individuals it is considerably greater than in the German shell, which, 

 like the British form, is smooth. There are two specimens of that shell, labelled 

 by Miinster himself, in the British Museum. One of these almost exactly agrees 

 with Phillips's type specimen in every respect. The other seems rather more 

 circular, and its siphuncle appears somewhat more central than that in our fig. 10. 

 On the whole there does not appear any reason for distinguishing the English 

 specimens, which, as will be seen below, are rather variable, from these two 

 shells. Thus, as far as the present evidence goes, they must be regarded as 

 identical, and therefore the species must bear Miinster's name. 



D'Orbigny separated the 0. cinctum of Miinster from that of Sowerby, calling 

 the former 0. cypris, d'Orb. He also separated Phillips's South-Petherwin shell 

 from Miinster's species under the name of 0. Oceani, d'Orb., though he gave no 

 reason for doing so, incorrectly retaining, however, the Newton specimens under 

 Miinster's name. Thus, if further knowledge of the English species should lead to 

 the necessity of separating them from 0. speciosum, they ought then to be known 

 as 0. Oceani, d'Orb. 



One of Mr. Vicary's fossils gave me some perplexity on account of its appa- 

 rently very cylindrical shape. I find, however, that this is due partly to the upper 

 part having been worn away, partly to the lower part being rather expanded by a 



1 1829, Sowerby, 'Min. Concb.,' vol. vi, p. 168, pi. cccclxxxviii, fig. 3. 



2 1888, Foord, ' Cat, Foss, Cepb. Brit, Mus.,' vol. i, p, 106. 



3 1840, Munster, ' Beitr.,' pt. 3, p. 99, pi. xix, figs. 4o, b. 



* 1836, PbiUips, ' Geol. Yorks,,' pt. 2, p. 237, pi. xxi, fig. 1. 



