58 
8ELACHII. 
P. 2974-5. Type specimens; Armagh. Ennishillen Coll. 
P. 2976. Ten specimens; some from Tynan. Ennishillen Coll. 
Polyrhizodus sinuosus, Davis. 
1883. Polyrhizodus ainuosus, J. W. Davis, Trans. Roy. Dublin Soc. [2] 
vol. i. p. 604, pi. lx. figs. 11-13. 
Type. Detached teeth ; British Museum. 
Teeth very similar to those of P. colei, but with less elevated 
crowns, and unsymmetrical. 
Form. 4" Loc. Lower Carboniferous Limestone : Armagh. 
P. 2970-2. Type specimens. Ennishillen Coll. 
P. 2973. Four teeth. Ennishillen Coll. 
Polyrhizodus elongatus, Davis. 
1883. Polyrhizodus eloitgaUta, J. W. Davis, Trans. Roy. Dublin Soc. 
[2] vol. i. p. 603, pi. Lx. fig. 16. 
Type. Detached tooth ; British Museum. 
Tooth laterally elongated, crown relatively low, with scarcely 
curved base-line in front and behind. “Rootlets” mostly sub- 
divided. 
Form. ^ Loc. Lower Carboniferous Limestone : Armagh. 
P. 2966. Typo specimen. Ennishillen Coll. 
P. 2967. Six similar teeth. Ennishillen Coll. 
Polyrhizodus attenuatus, Davis. 
1883. Polyrhizodus attenuatus, J. W. Davis, Trans. Roy. Dublin Soc. 
[2] vol. i. p. 505, pi. lx. fig. 14. 
Type. Detached tooth ; British Museum. 
Teeth scarcely distinguishable from P. elongatus, but much 
smaller. The unworn coronal edge is faintly cremilated. “ Root- 
lets ” much subdivided. 
Form. Loc. Lower Carboniferous Limestone : Armagh. 
P. 2968. Type specimen. Ennishillen Coll. 
P. 2969. Fourteen similar teeth ; some from Tynan. 
Ennishillen Coll. 
