INTRODUCTORY REMARKS. 



HISTORICAL REVIEW OF BRITISH SPECIES. 



/. de C. Soiverbij in 1839 (Murchison's ' Silurian System ') described and figured 

 the following new species ^ : 



Bellerojphon bilohatus. Bellerophon aymestriensis. 



„ acutus. „ globatus. 



[Euomphalus'\ perttirbatus. „ carinatus. 



[ „ ] tenuistriatus. „ expansus. 



BelleropJwn wenlockensis. „ striatus (non Bronn). 



,, dilatatus. ,, trilobatus. 



„ apertus (non Sowerby, 1820). ,, ,, var. 



/. E. Portloch in 1843 (' Geological Report on Londonderry, Tyrone, and 



Fermanagh ') described the following species from the Ordovician rocks of 



Tyrone : 



Bellerophon bilobatus, var. nov. compressus. Bellerophon dilatahis, Sow. var. 



„ elongatus, Portlock. „ alatus, Portlock. 



„ gibbus, Portlock. 



F. McCoi/ in 1846 (' Synopsis of Silurian Fossils of Ireland ') described a 

 species as Euomphalus furcatus, but it has subsequently been regarded as 

 identical with B. perturhatiis, Sow. He also recorded many of Sower1)y's and 

 Portlock's species from Irish localities. 



/. Phillips in 1848 (' Mem. Geol. Surv.,' vol. ii, pt. i, p. 356) established a new 

 species under the name of BeXleroplion ohtectus for a shell from the Silurian of 

 Marloes Bay. 



/. W. Salter in 1851 (' Quart. Journ. Geol. Soc.,' vol. vii, p. 172) recorded 

 several of Sowerby's species from the Lower Palaeozoic of the Girvan district, 

 and figured one from Drummuck as B. acutus, Sowerby {oj). cit., pi. ix, fig. 18). 



,/. W. Salter in 1854 (' Quart. Journ. Geol. Soc.,' vol. x, p. 74) described a 

 Bala species from Shropshire as Belleroplion [Bucania) sulcatinus, Emmons ?, 

 but the name lingualis was proposed for it. The name B. nodosm was applied 

 to another species previously described by McCoy as B. ornatus (Conrad). 



F. McCoy in 1851 — 4 ('Synopsis of the British Palseozoic Fossils in the 

 Woodwardian Museum, Cambridge,' pp. 308 — 311) redescribed several of 

 Sowerby's species, and established a new species under the name Belleruphon 

 subdecussatas. Bellerophon ornatus (Conrad) was also recorded. 



J. W. Salter in 1866 ('Mem. Geol. Surv.,' vol. iii, p. 350, pi. xi b, fig. 2) 

 described a new Arenig species as Bellerophon hippopus. 



J. W. Salter in 1873 (' Catalogue of the Cambrian and Silurian Fossils in the 

 Woodwardian Museum ') introduced the name Bellerophon Buthveni for a species 



1 The original generic names in square brackets are now regarded as erroneous or proved 

 to be preoccupied. 



