210 
SULACHII, 
1867. Streblodus oblomjus , R. Owen, Geol. Mag. vol. iv. p. 62, pi. iii. 
fig. 3. 
1883. Streblodus oblomjus. J. W. Davis, Trans. Roy. Dublin Soc. [2] 
vol. i. p. 424, pi. liii. tigs. 1-4. 
Type. Detached dental plate. 
Dental plate much elongated antero-posteriorly ; hinder tumid 
portion sharply separated by an abrupt elevation from the anterior 
portion, with which it is equal in extent; anterior portion crossed 
by one broad low ridge, and occasional faintly-marked grooves 
nearly parallel to the antero-lateral margin. 
This is supposed to be the upper dental plate of Cochliodus con- 
tortus by St. John and Worthen 1 . 
Form. Sf Log. Lower Carboniferous Limestone: Armagh, Ireland. 
P. 2417. Portions of two associated dental plates described and 
figured by Owen, loc. cit ., and by J. AY. Davis, tom. cit . 
p. 425, pi. liii. fig. 4. Enniskillen Coll. 
P. 2414. Incomplete dentition, described and figured, and referred 
to the lower jaw by J. AY. Davis, tom. cit. p. 424, pi. liii. 
fig. 1. The two rami are evidently crushed together, and 
in advance of the large posterior dental plate on each side 
are indications of the bases of two small series of teeth. 
Of the first series on the “ left” side, one of these small 
teeth is preserved in position, exhibiting the characters of 
the so-called genus Lophodus or Helodus. 
Enniskillen Coll. 
P. 2415-6. Two posterior dental plates, one exhibiting tho inrol- 
ment of the outer border ; figured by J. W. Davis, tom. 
cit. pi. liii. figs. 2, 3. Enniskillen Coll. 
P. 2418. Thirty similar specimens. Enniskillen Coll. 
P. 1400. Twelve specimens, mostly small. Egerton Coll. 
28727, 28917, 38502, P. 260. Seventeen specimens. Purchased. 
Streblodus colei* Davis. 
1862. Streblodus colei, Morris & Roberts (ex Agassiz, MS.), Quart. 
Journ. Geol. Soc. vol. xviii. p. 101 (name only). . 
1883. Streblodus colei, J. AY. Davis, Trans. Roy. Dublin Soc. [2] vol. i. 
p. 426, pi. liii. figs. 5, 6. 
Type. Detached posterior dental plates ; British Museum. 
1 Pal. Illinois, vol. vii. (1883), p. 92. 
