PETAtODOlTTXD^. 
41 
1883. Petalorhynchus psittacinm, J. W. Davis, Trans. Koy. Dublin Soc. 
[2J vol. i. p. 610, pi. bd. figs. 12-16. 
1883. Petalodiu hastinpsia, J. W. Davis, (am. cii. p. 494, pi. lix. figs. 18, 
20 , 21 . 
1880. Pelalorhynchm psittacimu, J. W. Davis, Geol. Mag. [3] vol. iii. 
p. 149. 
Type. Detached tooth. 
Crown in the larger teeth produeed into a sharp mesial point, and 
base extremely elongate and tapering. 
Form. ^ hoc. Lower Carboniferous Limestone : Armagh, Ireland. 
Upper Carboniferous Limestone : Derbyshire, England. 
Except where otherwise stated, the following specimens are from 
the Enniskillen Collection. 
P. 2954-8. Specimens described and figured by J. W. Davis Qoe. 
cit. 1883) ; Armagh. The tooth on the right of the spe- 
cimen shown in fig. 1.5, pi. Ixii. 1. e., was unfortunately 
missing when the collection reached the Museum, and is 
now only seen in impression. 
P. 2995-7. Three unsymmetrical teeth, erroneously ascribed to 
Petalodus hastinysice by J. W. Davis, he. cit. ; Armagh. 
P. 2961. Eleven series of teeth, similar to the original of fig. 16, 
loc. cit. ; Armagh. 
P. 2953. Sixty detached teeth in matrix, exhibiting anterior aspect ; 
some are broken, some complete, showing variations of 
form ; Armagh. 
P. 2960. Twelve detached teeth, showing posterior aspect, and 
partly anterior ; Armagh. 
P. 2959. Fifteen very unsymmetrical lateral teeth ; Armagh. 
P. 1424. Twelve teeth, some broken ; Armagh. Egerton Coll. 
28731-2, 28737, 28919. Nine teeth, mostly broken ; Armagh. 
Purchased, 1854. 
Var. minor. 
P. 5340. One perfect tooth, and four portions, detached from the 
matrix, only differing from the type specimens of P. psit- 
tacinus in their diminutive size. The perfect tooth is 
shown, twice nat. size, in PI. I. fig. 9 ; Tieknall, near 
Melbourne, S. Derbyshire. Wilson Coll. 
P. 5341. Connected series of four small teeth ; Tieknall. 
Wilson Coll. 
