52 Dr. H. Burmeister on Globiocephalus Grayl. 
VII.— On Globiocephalus Grayi, nov. spec. 
By Dr. HERMANN BuRMEISTER. 
[Plate IT. figs. 2 & 3.] 
Two months ago the public museum of Buenos Ayres received 
the skull of a large Dolphin of the subgenus G'lohiocephalus, 
which seems to belong to an unknown species inhabiting the 
southern parts of the Atlantic Ocean, as the skull was found 
on the shore of the State of Buenos Ayres. I venture to 
describe this new species under the name of my friend Dr. J. 
E. Gray, who has recently contributed so greatly, by his valu- 
able investigations, to the increase of our knowledge of the 
Cetacea. 
Compared with the skull of Globiocephalus svineval s. 
melas, as shown in the figures of this species given by Cuvier 
(Ossem. Foss. tome i. pl. xxi. fig. 11) and Gray (Catal. 
p- 316), this skull is somewhat larger in the anterior part of 
the nose, and not so large in the posterior part between the 
orbital arch. ‘To show this difference, I here give the mea- 
surements of the new species corresponding with those of the 
European species given by Dr. Gray (J. c.) :— : 
in. hin, 
Entire length of the skull ...... 25. 0 
Length of the nasal part........ 13. Oe 
Length of the teeth-series ...... 10 O 
Length of under jaw .......... 21°. 9 
Witte wt notch. 0.6: cae eC RRRe 
AV IGUR ME OFDIE 6s 6 5 ee 147 eo 
Width of intermaxillaries ...... i 
Width of middle of nose........ 8. 
Height of occipuf .......:.... 10 0 
As the general form of the exterior of the skull is sufficient] 
shown by the accompanying figure (Pl. II. fig. 2), I will 
describe only the differences of its constituent bones. The 
greatest difference is shown in the form of the tip of the nose, 
which is much broader and more rounded in Globiocephalus 
Gray? than in G, svineval. This difference is combined with 
a totally different form of the intermaxillary bones, these being 
short, rounded at the anterior extremity, and then nearly 
parallel, with the outer margins not diverging posteriorly as 
in the Kuropean species. In the middle these bones, in my 
new species, are narrower and more excavated at the margin ; 
and at their hinder parts they are rather more curved out- 
wards. ‘The part of the vomer which is visible between the 
intermaxillaries seems to be somewhat broader, and the small 
portion of the maxillaries, seen from above at the sides of the 
