- AA2, f . 
CESTRACIONTID^I. 
281 
1865. Acrodus lateralis, H. Eck, Form. bunt. Sandst. u. Muschelk. 
Oberschlesien, p. 60. 
1883. Acrodus lateralis, H. E. Sauvage, Bull. Soc. G 6 ol. France, [3] 
vol. xi. p. 493. 
Type. Detached teeth. 
A small species, the principal teeth not measuring more than 
0*01 in length, very similar to those of A. gaillarcloti, but often more 
elevated and keeled (according to Schmid). Anterior teeth longi¬ 
tudinally keeled and much elevated at the broader extremity; 
superficial wrinkles dichotomously branching. 
Form. <$f Loc. Muschelkalk : Lorraine, Saxe-Weimar, and Bavaria. 
Lettenkohl and Keuper : Saxe-Weimar {Schmid). Keuper: Thu¬ 
ringia. 
P. 2132, P. 2151. Small comparatively low-crowned tooth, probably 
of this species ; also one slightly larger, with the surface 
ornament in part reticulate, and obtained from Count 
Munster under the MS. name of A. punctatus, Miinst. ; 
Benk, Bavaria. 
Eger tori Coll. 
P. 2133, P. 2149. Seven typical teeth, five received from Count 
Miinster under the MS. name of A. pustulosus, Miinst. ; 
Benk. 
Egerton Coll. 
Ennislcillen Coll. 
P. 2758, P. 2761. Five teeth; Benk. 
P. 2133 a. Tooth in matrix ; Laineck, Bavaria. 
P. 2768. Broken tooth; Schlotheim, Gotha. 
Egerton Coll. 
Ennislcillen Coll. 
Acrodus keuperhms (Murchison & Strickland.) 
1840. Hybodus keuperinus, Murchison & Strickland, Trans. Geol. Soc. 
[2] vol. v. p. 338, pi. xxviii. fig. 3. 
1840. Tooth of Hybodus, Murchison & Strickland, ibid. fig. 3 * 
1861. Lophodvs, W. S. Svmonds, Old Bones, p. 103. 
1863. Nemacanthus, S. J. Mackie, The Geologist, vol. vi. p. 243. 
Type. Dorsal fin-spines and teeth. 
Teeth of small size, mostly much elongated, compressed at right 
angles to the long axis. Coronal contour elevated mesially ; longi¬ 
tudinal ridge prominent, dividing the surface into two unequal 
halves ; superficial striae strong, directly transverse. 
Form. Sf Loc. Keuper : Worcestershire and Warwickshire. 
P. 2152. Three teeth ; Pendock, Worcestershire. Egerton Coll. 
P. 2764. Six teeth, two shown, of twice the natural size, in PI. XIII. 
figs. 1 , 2 ; Pendock. Ennislcillen Coll. 
