CESTRACIONTIDiB. 
283 
Type. Detached teeth ; Bristol Museum. 
A small species, the principal teeth not measuring more than 
0-01 in length. Longitudinal keel moderately developed in all the 
teeth, a mediaji transverse keel also in many ; minute lateral denticles 
often present ; superficial wrinkles large, occasionally feeble, some- 
times bifurcated. 
Fonn. Loc. Kcupor : Saxe-Weimar, Wiirtemberg, and Hanover. 
Khatic ; S.W. England, and (?) Elgin, Scotland. 
23153. Two portions of bone-bed, with numerous teeth ; llhmtic, 
Aust Chff, near Bristol. l\irchased, 1849. 
P. 2155. About one hundred teeth from the Ehsetio fissure at Hol- 
well, near Erome, Somersetshire *. Eyerton Coll. 
P. 2135. Twenty teeth ; Ehsetie, Axmouth, Devonshire. 
Ejerton Coll. 
P. 2130. Slab with several teeth ; Axmouth. Egerton Coll. 
P- 2759. Twelve teeth; Axmouth. Ennisidllen Coll. 
P. 2136. Twelve teeth, supposed to have been obtained from the 
Bhmtic of Liuksfield, Elgin. Egerton Coll. 
P. 2150. Two small teeth, probably of this species, received from 
Count Miinster under the MS. name of A. angustus, 
Miiust. ; Hildesheim, Hanover. Egerton Coll. 
Acrodus nobilis, Agassiz. 
1837. Acrodue nobilis, \V. Buckland, Geol. & Min. 2nd edit. vol. ii. 
p. 47, pi. 27 e (name and fig. only). 
1838. Acrodus nobilis, L. Agassiz, Poiss. Fo.ss. vol. iii. p. 140, pi. xxi. 
1839. Acrodus lotus, L. .\gassiz, tom. cit. p. 144. 
1839. Acrodus gihberulus, L. Agassiz, tom. cit. p. 144, pi. xxii. figs. 1-3. 
1840. Acrodus jiobilis, K. Owen, Odontography, vol. i. p. 54, vol. ii. 
pis. xiv., XV. 
1868. Acridus arietis, F. A. Quenstedt, Jura, p. 00, pi. viii. fig. 10. 
Type. Incomplete dentition ; Bristol Museum. 
The type species, of very large size, the principal teeth often 
measuring 0-045 in length. Coronal contour gently rounded, 
covered by very fine wrinkles, frequently branching and reticulate ; 
longitudinal crest undeveloped, and only indicated by the divisional 
line of the ornament. Anterior teeth short and broad, without 
‘ 8ee Charles Moore, Quart. Joiirn. Geol. Soe. vol. xxiii. (1867), p. 463. 
