772 DR. J. E. GRAY ON THE DELPHINOID WHALES. [Nov. 15, 
“T have examined the hair of the Panda, and compared it with 
that of some of the Bears. I send you a sketch of some of these 
hairs. The Panda is evidently a more woolly animal than most of 
the Bears, and its hair shows a larger development of the medullary 
cells; but these differences are of very slight consequence, so little, 
indeed, that that they might only signify a mere specific distinction. 
If the hair of the Panda were to grow a little harsher, and include 
rather less wool, it might, as to construction, be that of a true Bear. 
You say that the Bear grows its hair in tufts; this is certainly the 
case with the Panda. The hairs of the Panda are quite simple, like 
those of any other mammal, and each one proceeds from its own 
follicle ; but the follicles being collected into groups, and not evenly 
dispersed over the surface, the tufted appearance is caused at once. 
‘I do not know if this is the case with the Kinkajou. I think 
the Panda’s hair is more like that of a Bear than the Kinkajou’s.” 
4. Notes on the Arrangement of the Genera of Delphinoid 
Whales. By Dr. J. E. Gray, F.R.S. &c. 
The Delphinoidea, or Toothed Whales, which have teeth in both 
jaws and a single crescent blower, have been divided by the shape of 
the skull; and in the ‘Catalogue of Seals and Whales’ I have at- 
tempted to divide them into sections according to the form of the 
pectoral fin. But the imperfect materials at my command did not 
enable me to carry out the plan to my satisfaction. 
The description of the skeletons of several genera which were before 
unknown, as that of Steno by Mr. Flower, Pontoporia by Dr. Bur- 
meister, and the examination of several skeletons which I had not 
before seen, have enabled me to carry out this plan on a more secure 
basis; and the result of the examination may be condensed into the 
following disposition. 
Pontoporia, which has the head like Inia and Steno, has a short 
fin truncated at the end, like Plantanista and Catodon, and differs 
from all these in having linear longitudinal nostrils: Orca, for ex- 
ample, which has a skull like many of the other Dolphins, but is so 
much more ferocious, has a short, broad, rounded fin; and Beluga 
and Monodon are peculiar for having a small ovate pectoral fin. 
I. Pectoral fin elongate, faleate, acute; hand longer than the arm- 
bones; fingers very unequal, the second and third being much 
longer than the other three. 
A. Pectoral fins from the sides of the body ; the second and third 
fingers of six or eight phalanges; the head beaked. Iniadze and 
Delphinidee, including the genera Steno, Sotalia, Delphinus, 
Clymenia, Delphinapterus, Tursio, Eutropia, Orcaella, Elec- 
tra, Leucopleurus, Lagenorhynchus, Feresa, Pseudorca, Pho- 
cena, Acanthodelphis, and Neomeris. 
