254 
8IREN0IDE1. 
36915. Much abraded palatine dental plate, resembling C. ovatus, 
Barkas ; Dalkeith, near Edinburgh. Purchased, 1863. 
21423. Similar dental plate, more imperfect; Carluke, Lanark¬ 
shire. Purchased, 1847. 
21422. Slab with imperfect palatine dental plate, the partial 
impression of another, and fragments of bone ; Carluke. 
Purchased-, 1847. 
P. 6284. Plaster cast of palatine dental plate described and figured 
in the Geol. Mag. vol. vi. p. 816, pi. ix. fig. 2; Low 
Main Seam, Newsham, near Newcastle-upon-Tyne. 
P. 3382-3. Imperfect palatine dental plate, and a' small example of 
the mandibular dental plate associated with Sagenodus 
incequalis ; Newsham. Enniskillen Coll. 
41121. Mandibular dental plate detached from matrix, somewhat 
crushed, and figured in the Geol. Mag. vol. vi. pi. ix. 
fig. 3 (C. tuberculatus) ; Carluke. Bryson, Coll. 
45854. Imperfect left mandibular dental plate, with bone ; News- 
ham. Purchased, 1874. 
P. 774. Similar but larger specimen; (?) Newsham. Egerton Coll. 
P. 5165. Mandibular dental plate; Hanley, Staffordshire. 
Purchased , 1885. 
P. 5164. Portion of a larger dental plate ; Tunstall, Staffordshire. 
Purchased, 1885. 
Ctenodus interruptus, Barkas. 
1869. Ctenodus interruptus, T. P. Barkas, Scientific Opinion, vol. ii 
p. 113. 
1890. Ctenodus interrupts, A. S. Woodward, Ann. Bep. Yorksh. Phil. 
Soc. 1889, p. .37, pi. i. fig. 2. 
1890. Ctenodus interrupts, B. H. Traquair, Geol. Mag. [3~l vol. vii 
p. 249. 
Type. Mandibular dental plate ; York Museum. 
Dental plates closely resembling those of C. cristatus, very 
variable in characters, with 12-14 ridges. Denticles very pro¬ 
minent and well separated in the outer moiety of the ridges, each 
much compressed in the direction of the ridge to which it pertains. 
Form, df Loc. Calciferous Sandstones : Eifeshire and Midlothian. 
Carboniferous Limestone : Eifeshire, Midlothian, and Ayrshire. 
Not represented in the Collection. 
