134 CARBONIFEROUS CEPHALOPODA OF IRELAND. 



Science and Ai-t), found that not only was it the type of de Koninck's Goniatites 

 ornatissimus, but that it belonged to the well-marked group of Brancoceras of 

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

 var. cvenistria," 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 Geological 

 Survey of Ireland, here accepted as aiithoritative. 

 Localifi/. — Grlenbane East, count}' of Limerick. 



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



Pekicyclus FUXAiTS, J. Sowerhij, sp. Plate XXXVIII, fig. 5; Plate XXXIX, 



figs. 1 a, b. 



18L3. Ellipsolithes funatcs, /. Soicerhy. Min. Conch., vol. i, p. 81, pi. xxxii. 

 1822. Amjionellipsites funattjs, /. Parkinson. Introd. Foss. Org. Eem., pp. 



164 and 233. 

 1828. N.^UTiLrs funatus, /. Fleming. British Animals, p. 32. 



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



geol., p. 515. 

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



1844. Ammonites frinceps (pars), Z. G. de Konincl:. Descriji. Anim. Foss. 



Ten-. Carb. Belg., p. 579 (excl. figs.). 

 1848. Goniatites pkixceps (pars), S. G. Broun. Gesch. d. Natur., vol. iii, p. 543. 

 1888. — funatus, B. Etlieridge. Brit. Foss., vol. J, Palaeozoic, p. 311. 



1897. Peeictclus funatus, A. H. Foord and G. C. Crick. Cat. Foss. Ceph. 



British Museum, pt. 3, p. 147. 



Descrij}ti(in. — Shell of moderate size, subdiscoidal, widely umbilicated; greatest 

 thickness at the imibilical margin ; height of outer whorl probably about one-third 

 of the diameter of the shell. "Whorls four or five ; inclusion about one-half ; 

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

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

 considerably indented by the preceding whorl; periphery broadly convex and 

 continuous with the sides ; inner margin narrow, well defined, steep. 



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

 of strong, roimded, transverse ribs, as in P. fasciculatus, which bifurcate 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 ti'ace of the sharp raised lines which form such a 



