COCHLIODONTIDJE. 
187 
with a small quadrilateral flat tooth. A second example 
of the latter occurs in the Collection (No. 42230, Baugh 
Coll.), and it would be comprised under the accepted 
definition of Psammoclus, like the so-called P. scdopiensis 
(supra, p. 105). The fact, however, that small quadran¬ 
gular flat teeth have been found bordering a dental plate 
of Psephodus Icevissimus (supra, p. 181) suggests the pos¬ 
sibility of a similar arrangement in Sandalodus. 
Weaver-Jones Coll. 
P. 216. Three similar triangular dental plates, one still smaller and 
showing two sutures parallel to the inner margin ; Oreton. 
Weaver-Jones Coll. 
46909. Medium-sized dental plate ; Bristol. Purchased, 1875. 
(ii.) Incurved Pounded Variety (? Lower Jaw). 
P. 2483, P. 2485-6. Type specimen figured by Morris & Boberts, 
tom. cit. pi. iii. fig. 1 ; also fragments of two smaller 
specimens : Oreton. Enniskillen Coll. 
P. 204-6. Three dental plates; Oreton. Weaver-Jones Coll. 
42202-9. Eight fragmentary dental plates; Oreton. Baugh Coll. 
42210. Small dental plates ; Oreton. Baugh Coll. 
36000, 37988, 41192. Three imperfect dental plates ; Oreton. 
Purchased. 
Sandalodus minor, Davis. 
1884. Sandalodus minor , J. W. Davis, Quart. Journ. Geol. Soc. vol. xl, 
p. 626, pi. xxvi. fig. 17. 
Type. Detached dental plate ; York Museum. 
A very small species. “Lower” dental plate narrow, pointed a$ 
one extremity, broader and rounded at the other; crown raised 
into a low rounded longitudinal ridge. 
Form. Sf Loo. Upper Carboniferous Limestone : Yorkshire. 
P.4894. “Lower” dental plate; Yoredale Bocks, Wensleydale, 
Yorkshire. Horne Coll. 
h 
Sandalodus angustus, Newberry & Worthen. 
1866. Sandalodus angustus, Newberry & Worthen, Pal. Illinois, vol. ii. 
p. 10-3, pi. x. fig. 3. 
Type. “Lower” dental plate. 
A small species, the long axis of the “ lower ” dental plate mea-= 
