134 CARBONIFEROUS CEPHALOPODA OF IRELAXD. 



Science and Art), found tliat not only was it tlie type of de Koninck's Goniatites 

 ornatlsshnus, but that it belonged to tlie well-marked groujD of Brancoceras of 

 Hyatt. The specimen had wp to that time borne the name of " Goniatites sphcericus, 

 var. crenlstria," but with this species, it need scarcely be said, it has no features 

 in common. It should be stated that the locality given by de Koninck (who must 

 have got his information from an Irish source) for the present species — Tomdeelys, 

 county of Limerick — does not agree with the one registered by the Ceological 

 Survey of Ireland, here accepted as authoritative. 

 Locality. — Clenbane East, county of Limerick. 



Genus Perioyclus, von Mojsisovics, 1882 (emend. Hyatt, 1883; Holzapfel, 1889). 



Peeioyclus funatus, /, Somerhy, sp. Plate XXXVIII, fig. 5 ; Plate XXXIX, 



figs. 1 a, h. 



1813. Ellipsolithes fcnatus, /. Sowerhy. Min. Conch., vol. i, p. 81, pi. xxxii. 

 1822. Ammonellipsites funatus, /. Parhinson. Introd. Foss. Org. Eem., pp. 



164 and 233. 

 1828. Nautilus funatus, /. Fleming. British Animals, p. 32. 



1843. Goniatites funatus, L. G. de Koninck, in J. J. d'Omalius, Precis elem. 



geol., p. 515. 

 — Nautilus funatus, J Morris. Cat. Brit. Foss., p. 182. 



1844. Ammonites peinceps (pais), L. G. de Konincl-. Descrip. Auim. Foss. 



Terr. Carb. Belg., p. 579 (excl. figs.). 

 1848. Goniatites princeps (pars), H. G. Bronn. Gesch. d. Natur., vol. iii, p. 543. 

 1888. — funatus, R. Etheridge. Brit. Foss., vol. i, Palaeozoic, p. 311. 



1897. Pekictclus funatus, A. H. Foord and G. C. CricJc. Cat. Foss. Ceph. 



British Museum, pt. 3, p. 147. 



Description. — Shell of moderate size, subdiscoidal, widely umbilicated; greatest 

 thickness at the umbilical margin ; height of outer wliorl probably about one-third 

 of the diameter of the shell. Whorls four or Aa'c ; inclusion about one-half ; 

 umbilicus not very deep, nearly one-half of the diameter of the shell in width, 

 with subangular margin. Whorl reniform in section, much wider than high ; 

 considerably indented by the preceding whorl ; periphery broadly convex and 

 continuous ^^ath the sides ; inner margin narrow, Avell defined, steep. 



Body-chamber, chambers, and suture-line not seen. Ornamentation consisting 

 of strong, rounded, transverse ribs, as in P. fasciculatns, which Infurcate frequently 

 in the young shell, apparently more rarely in the adult. The spaces between the 

 ribs are a little wider than the ribs themselves. Constrictions occur apparently 

 irregularly and at long intervals apart ; these are bounded anteriorly by a 

 somewhat stronger rib, upon which a conspicuous node is developed at the 

 umbilical margin. There is no trace of the sharp raised lines which form such a 



