PYCN0D0NTIDJ3. 
257 
principal series on the splenial bone smooth, somewhat more than 
three times as broad as long; those of the inner flanking series 
considerably more than half as broad as the latter. 
Form. Sf Log. Senonian : Sussex, - 
Not represented in the Collection. 
The following species have also been defined from fragmentary 
specimens and are not represented in the Collection :— 
Coelodus angustatus , J. J. Heckel, Denkschr. k. Akad. AViss., math.- 
naturw. Cl. vol. xi. (1856), p. 203. Glossodus angustatus , 
O. G. Costa, Atti Accad. Pontan. vol. vii. (1853), p. 27, 
pi. iii. figs. 12-15.—L. Cretaceous ; Pietraroja, Naples. 
[Imperfect dentition.] 
Coelodus asjoerulus: Pycnodus asjoerulus , J. Cornuel, Bull. Soc. 
Geol. France, [3] vol. xi. (1883), p. 24, pi. i. figs. 6, 7.— 
Neocomian; Haute Marne. [Splenial; Communal Museum_________— 
Doulevant-le-Chateau.] v s - W- 
Coelodus browni , E. D. Cope, Journ. Acad. Nat. Sci. Philad. [2] 
vol. ix. (1894), p. 447, pi. xx. fig. Lower Cretaceous; 
Oklahoma. [Left splenial.] d 
sFlA. , \S . 
ix.(fgtrP) t 28 , 
/Jl.vi. 
‘P'XaXa/. L J? '• Jb/V/ 
Coelodus carentonensis : Gyrodus carentonensis , H. Coquand, 
Descript. Geol. etc. De'part. Charente, vol. ii. (1860), 
p. 97. Cosmodus carentonensis , H. E. Sauvage, Bull. Soc. I 
Sci. Nat. Tonne, vol. xxxiii. pt. ii. (1879), p. 49, and Bull. \ v /p fc ? c;0 ' 
Soc. Geol. France, [3] vol. viii. (1880), p. 459, pi. xiv. C ' ~ 
fig. 1.—Cenomanian ; Charente, France. [Portion of 
vomerine dentition, type of Cosmodus , Sauvage.] 
Coelodus discus , J. J. Heckel, loc. cit. vol. xi. (1856), p. 203. ~ 
Pycnodus rhombus , 0. G. Costa (errore), loc. cit. vol. v. d?* 
(1850), p. 332, pi. v. fig. 1.—Upper Jurassic; Torre^^'’ 
d’Orlando, Naples. 
Coelodus fabarius : Pycnodus fabarius, E. Sismonda, Mem. B. 
Accad. Sci. Torino, [2] vol. xix. (1861), p. 457, pi. i. 
fig. 12.—Neocomian ; Piedmont. [Splenial.] 
Coelodus major : Cosmodus grandis , H. E. Sauvage, Bull. 
Soc. Sci. Nat. Tonne, vol. xxxiii. pt. ii. (1879), p. 49, 
pi. iii. fig. 29.—Cenomanian; Seignelay, Tonne, France. 
[Splenial.] 
Coelodus mesoracliis , J. J. Heckel, loc. cit. vol. xi. (1856), p. 220, 
pi. viii. fig. 1; F. Bassani, ibid. vol. xlv. (1882), p. 202.— 
Upper Cretaceous ; Island of Lesina, Dalmatia. [Imperfect 
trunk; Court Museum, Vienna.] 
Coelodus muralti , J. J. Heckel, Berickt. Mittheil. Freund. Naturw. 
Wien, vol. iv. (1848), p. 184, woodc., and loc. cit. vol. xi. 
PART III. 
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