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Show 1906. ON THE ANATOMY OF CENTROPHORUS CALCEUS. 8 6 5 Schrenk's Arvicola amurensis*, from the Lower Amur, is probably a true Evotomys. It has a molar tooth-row of only 4-7 mm. It may be remarked that of this fine series not even the oldest specimen shows any trace of the formation of roots to the molars. 9. L epus coreanus Thos.t S • 720. $ . 717, 718, 719. Taiku, Southern Korea. 500'. The type of this Hare was obtained by Mr. C. W. Campbell at Seoul, in 1889. 4. Ou the Anatomy of Centropliorus calceus (crcpidalbiis Bocage & Capello) Grtinther. By W . W o o d l a n d , F.Z.S., Demonstrator of Zoology, King's College, London. [Received October 8, 1906.] (Plates LYII.-LXII.t and Text-figures 127-138.) Centropliorus calceus is one of the rarest, if not. the rarest, species of the not very common genus Centropliorus. For this reason alone, a description of the anatomy § of the species is a desideratum ; but in addition to this, there is the fact that up to the present no single member of the genus has yet been fully examined with regard to its internal organisation, and hence, on both grounds, the following fairly complete account of the structure of a female specimen of the above-named species may prove of value. Further, I may add that certain portions of the anatomy of Centropliorus calceus are peculiar, and such I shall of course consider at greater length than those which more or less partake of the normal selachian type. The comparative rarity || of C. calceus is most conspicuously proved by the fact that whilst the British Natural History Museum at the present time possesses three adult female specimens and two embryos, the Paris Museum three adult females and five embryos, and the Berlin Museum one poorly-preserved specimen, the museums of Brussels, Vienna, Stockholm, Naples, New York, Cambridge (Massachusetts), St. Petersburg, Tokyo, Cape Town, and Calcutta do not possess a single specimen. The distribution also of C. calceus is extremely limited, specimens of the species hitherto, judging from my own enquiries and the statements I have met with, alone having been * Reis. Amur-lande, i. p. 129 (1859). ■f Lepus sinensis coreanus Thos. Ann. Mag. N. H. (6) ix. p. 146 (1892) . X For explanation of the Plates see p. 884. § This piece of work was done, with others, during my tenure of the Derby Scholarship (1903-1905) at University College, London. || Bocage and Capello, however, state that C. calceus " n'est pas rare dans nos mers [off coasts of Portugal], et nos pecheurs la connaissent trjs-bien sous le nom de * sapata-branca ' " ; Lowe, on the other hand, applies to his " Centropliorus calceus " the term " rarior," though not " rarissima." |