213 
PICNODONTID^E. 
P. 3757. Another specimen with more numerous flanking teeth ; 
Purbeck Beds, Swanage. Enniskillen Coll. 
35577. Portion of left splenial apparently of a large species of 
Mesodon , with numerous small lateral teeth ; Lias, Gamer- 
ton, near Bath. The bone measures about 0025 in 
maximum width, and the teeth of the principal series are 
somewhat broader than long. 
Presented by Hugh Owen , Esq., 1859. 
'r 
V' 
The following species have also been founded on portions of 
dentition, of which there are no examples in the Collection :— 
Mesodon ciutissiodorensis: Pycnoclus ciutissiodorensis , H. E. Sau- 
vage, Bull. Soc. Sci. Nat. Yonne, vol. xxxiii. pt. ii. (1879), 
p. 38, pi. i. fig. 6.—Neocomian; Yonne, France. [Bight 
splenial.] 
Mesodon bathonicus, H. E. Sauvage, Bull. Soc. Geol. France, [3] 
vol. viii. (1880), p. 527, pi. xix. fig. 1. Pymodus affmis, 
H. E. Sauvage, Catal. Poiss. Form. Second. Boalonnais 
(1867), p. 26, pi. ii. fig. 6 ( errore ).—Bathonian ; Mar¬ 
quise. [Imperfect left splenial; Boulogne Museum.] 
Mesodon boloniensis, H. E. Sauvage, loo. cit. (1880), p. 527. Pyo- 
nodus boloniensis , H. E. Sauvage, op. cit. (1867), p. 27, 
pi. ii. fig. 4. Pycnoclus jugleri, ET. E. Sauvage, ibid. 
(1867), p. 27, pi. ii. fig. 5 {errore'). —Bathonian ; Marquise. 
[Portion of right splenial; Boulogne Museum.] 
Mesodon diastematicus, E. D. Cope, Journ. Acad. Nat. Sci. Philad. 
[2] vol. ix. (1894), p. 443, woodc. fig. 5.—Lower Cre¬ 
taceous; Texas. [Vomer of uncertain genus.] 
esodon dumblei , E. D. Cope, ibid. p. 444, pi. xx. fig. 7. Micro- 
dus dumbelii, E. D. Cope, Proc. Amer. Phil. Soc. vol. xxx. 
(1892), p. 128.—Lower Cretaceous ; Texas [Left 
splenial.] ' 
Mesodon dutertrei, H. E. Sauvage, Bull. Soc. Geol. I ranee,”[3]“^"^- 
vol. viii. (1880), p.528 (in part). Pycnoclus dutertrei , i , 
H. E. Sauvage, Catal. Poiss. Form. Second. Boulonnais 
(1867), p. 31, pi. ii. fig. 7 {non pp. 38, 45, pi. ii. figs. 8, 9 
= vomer of Gyroclus and splenials of Lepidotus). —Port- rA. i(ujo?), p 
landian ; N. France. [Left splenial; Boulogne Museum.] 
Mesodon gervaisi, H. E. Sauvage, Bull. Soc. Geol. France, [3] 
vol. viii. (1880), p. 527. Pycnoclus gervaisi, H. E. Sauvage, 
Catal. Poiss. Form. Second. Boulonnais (1867), p. 29, pi. ii. 
fig. 2, and Bull. Soc. Geol. France, [3] vol. viii. (1880), 
