COCHLIOBONTIDiE. 
223 
P. 4909 a. Small tootli, approaching the form described by J. W. 
Davis as Lophodus conicvs ‘ ; Yoredalc Hocks, Weiisley- 
dale, Yorkshire. Horne Coll. 
V. Small elongated teeth with one half of the crown broader and 
much more raised than the other, the elevation abruptly 
terminating about the middle of the tooth ; described as 
Chomaiodus (Helodas) obliquus by M‘Coy 
P. 2626. Forty teeth ; Armagh. Enniskillen Coll. 
VI. Small elongated teeth with a relatively large quadrangular 
coronal elevation, often slightly cleft by a small groove 
upon one side of its summit, described by M‘Goy as 
Helodus dkhjnms 
P. 2638. Eighty specimens ; Armagh. Enniskillen Coll. 
P. 2605, P. 2639, P. 2640, P. 4927. Sixty specimens, mostly with 
the quadrangular elevation very broad ; Armagh. 
Enniskillen Coll. 
P. 1429. Two similar teeth ; Armagh. Egerton Coll. 
P. 1431-2. Twelve teeth, and three abraded teeth in natural 
sequence; Armagh. Egerton Coll. 
28746, 28749, 38507. Seventeen specimens ; Armagh. 
Purchased, 1853, 1864. 
46040. Small tooth, with elevation more pointed ; Beith, Ayrshire. 
Presented by liobert Craig, Esq., 1874. 
46041. Much depressed tooth, with broad elevation; Beith. 
Presented by liobert Craig, Esq., 1874. 
P. 1430. Typical tooth ; Monmouthshire. Egerton Coll. 
P. 218. Tooth ; Orcton, Shropshire. Weaver-Jones Coll. 
P. 2657. Three imperfect teeth ; Oreton. ' Enniskillen Coll. 
‘ Quart. Journ. Geol. Soc. vol. xl. (1884), p. 027, pi. xxvi. fig. 18. 
Aim. Mag. Kat. Hist. [2] vol. ii. (1848), p. 124 ; Brit. Palitoz. Foss. (185.5), 
p. 018, pi. 3 K. fig. 3. 
^ Brit. Palaioz. Foss. (1855), p. 030, pi. 3i. figs. 18-20. Lopkodus didymus, 
II. Eomaiiowsky, Bull. Soc. Imp. Nat. Moscou, 1804, pt. ii. p. 162, pi. iv. 
fig. 23 ; also J. W. Davis, Trans. Boy. Dublin Soc. [2] vol. i. (1883), p. 407, 
pi. li. fig. 21. 
