CONULARIA. 36 



not that Huronia, as distinct from Actinoceras, existed in the Devonian, but that 

 Huronia itself is merely a condition or, at most, a group of the genus Actinoceras. 



Taking these sections in connection with the probable indications of external 

 ornament, there seem to be sufficient characters known to warrant the suggestion 

 of a name for the species. 



Affinities. — The large Orthoceras Ludense, Phillips (not Sowerby), from 

 these beds seems distinguished by its much greater size, wider chambers, and the 

 shape of its siphuncle. 



Actmoceras striatum^ Sowerby ^ ( = 0. lineale, de Koninck'), differs in having 

 much finer and more numerous equal lineations. It may be noted, however, that 

 in the Woodwardian Museum there are specimens from Mudstone Bay and from 

 Mawgan, which seem, in the few points visible, exactly like our fossils, and which 

 are there labelled Orthoceras striatum (probably on the authority of Prof . M'Coy). 



A. subconicum, d'Orbigny,' is, as figured originally by Sowerby,* remarkably 

 like our sections, but has narrower chambers and more central tubuli. 



Class— GASTEROPODA, Goldfuss, 1820. 



1. Oeder— PTEROPODA, Guvier, 1798. 



I. Family — Conulaeiidjj;, Walcott, 1890. 



1. Genus — Condlaria, Soiverhy, 1818. 



1. CoNULARiA DEFLBXioosTA, Sandhcrger ? Plate IV, fig. 13. 



? 1847. CoNULAEiA DEFLEXicosTA, G. Sandlerger. Bronn's Jahrb., Ann. 1847, p. 16, 



pi. i, fig. 6. 



? 1853. — ■ — Sandherger. Verst. Rhein. Nassau, p. 248, 



pi. xxi, figs. 1, 1 a. 



? 1879. — CONTINENS, var. eudis, Rail. Pal. N. T., vol. v, pt. 2, p. 215, 



pi. xxxiv A, figs. 7, 8. 



Bescrlption. — Shape probably a rather short pyramid. Faces without a central 

 groove, but probably with a deep (angular?) marginal channel. Striee distant, 



1 1814, Sowerby, ' Min. Conch.,' vol. i, p. 129, pi. iviii ; and 1888, Foord, 'Catal. Foss. Cepbal.,' 

 pt. 1, p. 190. 



2 1880, de Koninck, 'Ann. Mus. Eoy. N. H. Belg.,' vol. v, p. 79, pi. xli, figs. 9— 9c; and 

 pi. xliii, figs. 8 — 8 e. 



3 1849, d'Orbigny, ' Prodrome,' vol. i, p. 2. 



* 1839, Sowerby, in Murcbison's ' Sil. Syst.,' p. G42, pi. xxi, fig. 21. 



