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Show 772 DR. J. E. GRAY ON THE DELPHINOID WHALES. [Nov. 15, " I 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 . G R A Y , 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 attempted to divide them into sections according to the form of the pectoral fin. But the imperfect materials at m y command did not enable me to carry out the plan to m y satisfaction. The description of the skeletons of several genera which were before unknown, as that of Steno by Mr. Flower, Pontoporia by Dr. Burmeister, 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 example, 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, falcate, 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. Iniadae and Delphinidse, including the genera Steno, Sotalia, Delphinus, Clymenia, Delphinapterus, Tursio, Eutropia, Orcaella, Electra, Leucopleurus, Layenorhynchus, Feresa, Pseudorca, Pho-ceena, Acanthodelphis, and Neomeris. |