MYLIOBATIDJE. 
147 
P. 1383. Group of seven naturally associated teeth ; Kent. 
Egerton Coll. 
47281. Two large teeth, probably a variety of this species ; Lower 
Chalk, Dover. Gardner Coll. 
47903. Similar lower median tooth; near Maidstone. 
Presented by the Hon. Robert Marsham, 1877. 
33253. Almost similar, but broader and more perfect tooth ; Kent. 
Taylor Coll. 
P. 5605. Three associated teeth and three others; Burham, Kent. 
Harford Coll. 
ut 
Ptychodus latissimus, Agassiz, 
1752. Dens piscis Ostracionis, Briickmann, Acta Phys. Med. vol. ix. 
p. 116, pi. v. fig. 3. 
1769. Zahn eines Seefisches, C. F. Wilckens, Xaclir. 1 erstein. Thier- 
reiches, p. 81, figs, xlv.-xlvii. 
1811. Fish Palate, J. Parkinson, Org. Remains, vol. iii. pi. xix. fig. 18. 
1822. Tooth allied to Diodon, G. A. Mantell, Foss. South Downs, 
p. 231, pi. xxxii. fig. 19. 
1822. Hinterer kieferzahn einer Rochenart (?), E. F. von Scklotlieim, 
Petrefakt. Nachtr. i. p. 70, pi. xiii. fig. 2. 
1827. Diodon , T. A. Catullo, Saggio Zool. Foss. pi. iii. fig. C. 
/ .1843. Ptychodus latissimus , L. Agassiz, Poiss. Foss. vol. iii. p. 157, 
c* pi. xxv. a. figs. 1-6 (P fig. 7, non fig. 8), pi. xxv b. figs. 24-26. 
1845. Ptychodus latissimus, A. E. Reuss, Verstein. hohm. Kreideform. 
pt. i. p. 1, pi. ii. figs. 5-8. 
1845. Ptychodus decurrens, A. E. Reuss, op. cit. pt. i. p. 1, pi. ii. 
figs. 9,10. 
1845. Ptychodus latissimus, R. Owen, Odontogr. vol. ii. pi. xvii. 
figs. 1, 2. 
1845. Ptychodus latissimus, H. B. Geinitz, Versteinerungsk. p. 167, 
pi. vii. fig. 8. 
1850. Ptychodus latissimus, H. B. Geinitz, Charact. bohm.-sacksisch. 
Kreidegeb. 2nd edit. p. 63, pi. vii. fig. 5, pi. xvii. figs. 1-3. 
1850. Ptychodus schlotheimi, H. B. Geinitz, op. cit. p. 63, pi. xvii. 
figs. 4, 5. 
1850. Ptychodus paucisulcatus, F. Dixon, Foss. Suss. p. 363, pi. xxx. fig. 3. 
1851. Ptychodus latissimus, F. Oswald, Zeitschr. deutsch. geol. Ges. 
vol. iii. p. 531. 
1852. Ptychodus latissimus, Y. Kiprijanoff, Bull. Soc. Imp. Xat. Moscou, 
vol. xxv. pt. ii. p. 483, pi. xii. figs. 1, 2. 
1870. Ptychodus latissimus, F. Roemer, Geol. Oberschlesien, p. 323, 
pi. xxxvi. fig. 7. 
1873. Ptychodus latissimus, F. Stoliczka, Cret. Fauna S. India (Pal. 
Ind.), vol. iv. pt. iv. p. 66, pi. xii. fig. 16. 
L 2 
