On Dioplodon sechellensis. 343 
XXXIIL—On the Skeleton of 
Dioplodon sechellensis in the 
Australian. Museum at Syd ney. 
s J. E. RAS, F.R.5. &c. 
obtained by M. Leduc in 1839 in 
the Seychelle Islands. I figured 
the lower jaw and skull in the 
‘ Zoology of the n and Ter- 
fme Lu LL 4 T. Duver- 
noy figured the skull, under the- 
name of Mesodiodon densirostris, 
in the ‘Annales des Sciences 
relles,’ 1851, vol. xv. M. Gerv 
also figured ilie skull in the ys 
logie et Paléontologie française, 
t. xlii. f. 6, under the name of 
Dioplodon densirostris ; and its 
skull is figured under 'the name 
of D. sechellensis in the * Ostéo- 
graphie des Cétacés,’ t. xxv. f. 2, 
3, as distinct from D. densirostris, 
the end of the beak of which is 
figured in fig. 1 of the same plate. 
The name densirostris is use 
in the Paris Museum because 
Blainville called it Ziphius densi- 
rostris; but it must not con- 
founded with E sical densi- 
rostris, Dietas 
The rest of ge skeleton uM 
been there unknown. It 
very much like that of Zi Shis 
Sowerbiensis, an imperfect ske- 
leton of the. female of which is 
f d by M. Van Beneden under 
the name of Mesoplodon pores 
biensis in the octavo * Memoirs 
the Academy of Brussels,’ vol 
