new or little-known Goniatites from Ireland. 



447 



related to such forms as Glyphioceras reticulatum, J. Phillips, 

 sp.*, and Glyphioceras Davisi, Foord & Crick +, but from 

 the former it differs by its more inflated whorls, the form of 

 its umbilicus, and the nature of its suture-line, and from the 

 latter by its angular but not prominent umbilical margin and 

 the form of its suture-line. 



Horizon and Locality. Both examples that are referred 

 to this species are from the Carboniferous Limestone of Little 

 Island, Cork, Ireland. 



Glyphioceras corpulentum, sp. n. (Figs. 12, 13.) 



Sp. char. Shell subglobose, umbilicated, rapidly in- 

 creasing : greatest thickness at the umbilical margin, about 

 three fifths of the diameter of the shell ; height of outer whorl 

 about three sevenths of the diameter of the shell. Whorls 



Fig. 12. 



Glyphioceras corpulentum. — a, lateral view of the type specimen ; b, peri- 

 pheral view of the same, showing the longitudinal and transverse 

 ornaments of the test. Carboniferous Limestone : St. Doulagb's, 

 Co. Dublin, Ireland. Drawn from an example in the collection of 

 Dr. A. H. Foord, F.G.S. About three fifths natural size. 



few (? number) ; inclusion nearly complete ; umbilicus deep, 

 with subangular margin and steep sides, about three tenths of 



* J. Phillips, Geol. Yorks. pt. ii. 1836, p. 235, pi. xix. figs. 26-32. 

 See also A. H. Foord & G. C. Crick, Cat. Foss. Ceph. Brit. Mus. pt. iii. 

 1897, p. 193. 



t A. H. Foord & G. C. Crick, Cat. Foss. Ceph. Brit. Mus. pt. iii. 1897, 

 p. 198, fig. 95. 



33* 



