88 MR. W. H. FLOWER ON THE OSTEOLOGY OF 
In the Zoology of d@Orbigny’s ‘ Voyage en Amérique méridionale,’ “‘ Mammiféres,” 
by d’Orbigny and Gervais (1847), more careful figures both of the upper and lateral sur- 
face, and of the teeth, of the same skull are given (pl. 22), but unaccompanied by any 
further description. It is, however, suggested that the animal belongs to the same 
species as a stuffed and painted specimen received at the Paris Museum from the Musée 
d’Ajuda at Lisbon among the spoils of Napoleon’s Peninsular campaign, and described 
by de Blainville in the Article “Dauphin” in the ‘Nouveau Dictionnaire d'Histoire 
Naturelle,’ t. ix. p. 151 (1817), as Delphinus geoffrensis, and subsequently by Desmarest* 
as D. geoffroyi. 
In a later notice by Professor Gervais, in the Zoology of Castelnau’s ‘ Expédition 
dans les parties centrales de l’Amérique du Sud,’ “‘ Mammiferes,” p. 90 (1855), this sup- 
sition is confirmed, and the name Jnia geoffrensis definitively adopted. In this notice 
some further details are given respecting the original skull brought home by d’Orbigny ; 
and a new figure of the external appearance of the animal is added, differing chiefly 
from that of d’Orbigny in the position of the pectoral limb. 
A few years ago that enterprising naturalist Mr. H. W. Bates obtained at Ega two 
skulls, which are now in the British Museum. Of one of these, Dr. Gray has given the 
dimensions }. 
According to information received from my friend Dr. Peters, there is in the Ana- 
tomical Museum at Berlin a skull brought home by Natterer. No description of this, 
however, has been published. 
In the early part of the present year Mr. Edward Bartlett, while collecting zoological 
specimens on the upper Amazon, above Nauta, succeeded, after encountering many diffi- 
culties, in obtaining a complete animal, the carefully prepared skeleton of which has 
now been purchased for our National Collection. For the opportunity of examining 
and describing this rare and interesting specimen, before it was deposited in the 
Museum, I am indebted to the kindness of Dr. Gray. 
The skeleton is that of a young animal, the epiphyses being not united to the bodies 
of the vertebre from the axis to the tenth caudal; but the arches have completely 
coalesced with the bodies throughout the spinal column, The head of the humerus 
still retains its epiphysial condition. The total length of the living animal, judging 
from the skull and vertebra, and allowing for the intervertebral spaces, would be but 
little more than 5’, the skull being 16:4". The specimen. obtained by dOrbigny is 
stated to have measured 2™-4=6! 8" Eng., and its skull is 0™-48 or 19". The skulls 
collected by Mr. Bates indicate animals of still larger size, the one being 19:4”, the 
other 20-7" long. The skull at Berlin, as Professor Peters has informed me, is 193" 
Eng. in length. Martius states the length of the animal to be from 7 to 8 feet. Finally, 
Castelnau gives 2™:80 or 8! 4" as the length of an individual taken at Nauta. 
* Mammalogie, p. 512 (1822). 
+ Catalogue of Seals and Whales in the British Museum, p. 227 (1866). 
