figured in Phillips 1 s 'Geology of Yorkshire? 483 



pentangulatus group I am convinced. I merely differ from 

 him as to the nomenclature of this section, which, I think, 

 requires a name for its recognition. 



The classification of these Euomphaloid shells now advo- 

 cated will be found expressed in the following table, which 

 will also give the synonymy of each group, and the species 

 which fall into it described by Phillips, with two exceptions. 



The shells in question {Cirrus tahulatus, Phill., and Euom- 

 p)halus cristatus, Phill.) require a separate notice. The first 

 of these will, I have very little doubt, constitute itself a species 

 of Meek's subgenus Omp>halotrochus, the resemblance between 

 his type (0. Whitneyi) and the fine example of C. tahulatus 

 figured by Mr. J. de C. Sowerby being very great. 



The second of these shells (E. cristatus, Phill.) has been 

 made the subject of a distinct genus by Mr. J. de C. Sowerby, 

 viz. Phanerotinus *, which I propose to retain as such, fol- 

 lowing in this respect my friend Prof. J. Morris. It most 

 certainly is not a Euomphalus simply. 



Genus Stkaparollus, De Montfort, 1810. 

 Section (a) Straparollus (proper), De Montf. 1810. 

 Type S. Dionysii, De Montf. 



= Cirrus, J. Sow. 1814 ; Euomphalus (pars), Fleming, 1828 ; Euom- 

 phalus, M'Coy, 1844 ; Euomphali cirroidei, De Koninck, 1843 ; idem, 

 Bronn, 1848 ; Cirrus, Brown, 1849 ; Straparollus (pars), D'Orbigny, 

 1850; Straparollus (pars), M'Coy, 1853; Euomphalus (pars), Eich- 

 wald, 1860 ; Straparollus, Meek and Worthen, 1866. 



Species described by Phillips: — Cirrus acutus, J. Sow.; 

 C. pentagonalis, Phill. ; C. rotundatus, J. Sow. ( = S. Dio- 

 nysii, De Montf.) ; C. pileopsideus, Phill. ; and C. spiralis, 

 Phill. 



Section (b) Euomphalus, J. Sowerby, 1814. 

 Type E. pentangulatus, J. Sow. 



= Bifrontia (pars), Deshayes, 1824 ; Schizostoma, Bronn, 1837; Schizo- 

 stoma et Euomphalus, Fischer, 1837 ; Euomphalus (pars), M'Coy, 

 1844 ; E. schizostomatoidei, De Koninck, 1843 ; idem, Bronn, 1848 ; 

 Straparollus (pars), D'Orbigny, 1 849 and 1850 ; ? Diseohelix, Dun- 

 ker, 1846 ; Euomphalus, Brown, 1849 ; Straparollus, M'Coy, 1853 ; 

 Euomphalus, G. & F. Sandberger, 1850-56 ; Euomphalus (pars), 

 Eichwald, 1860 ; Euomphalus, Meek and Worthen, 1866. 



Species described by Phillips: — Euomphalus pentangulatus, 

 Sow. ; E. catillus, Martin ; E. calyx, Phill. ; E. bifrons, 

 Phill. { = E.pugilis, Phill). 



* Min. Conch. 1843, vii. p. 29. 



