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Show 140 MR. K. ANDERSEN ON BATS [May 16, of hairs of the upper side and the whole of the under side " drab-grey." (2) Aged individuals; skins; Cyprus, Malta, Balearic Islands, Switzerland, Germany. Much browner. General colour above brownish " drab," with some individual variation in the shade of the colour: sometimes almost " wood-brown" (lightest extreme), sometimes with a tinge of " Prout's brown " (darkest extreme) ; horse-shoe patch indicated, or quite obliterated ; base of hairs " ecru-drab" ; under side " ecru-drab," sometimes with a tendency towards " drab-grey." Skull. As in Eh. midas. Dentition. As in minor and midas. In the series of skulls examined (20; of all races) there is, of course, some variation in the position of p3; the general rule is : p3 external, p2 and p4 almost or quite in contact; one extreme: p3 almost in row (one skull), and p., and p4, therefore, well separated ; the other extreme : p3 not only external, but hair-fine (four skulls ; teeth unworn), or disappeared and the alveoli obliterated (two skulls; teeth unworn). Distribution. From Gilgit to Ireland ; from the Baltic to Sennar. Geographical races. The series examined- 95 examples, from almost the whole area occupied by the species-enables me to recognise three races of Eh. hipposiderus. The first two of these would probably be called distinct species by other zoologists. 27 a. R h in o l o p h u s h ip p o s id e r u s m in im u s Heugl. Rhinolophus minimus Heuglin, N. Act. Acad. Cfes. Leop.-Car. xxix. (1861) p. 6. Ehinolophus hipposiderus minimus Andersen, Ann. & Mag. Nat. Hist. (7) xiv. (1904) p. 455. Diagnosis. Small: forearm 34'7-38 mm. Details. As lately pointed out by me elsewhere (I. s. c.), v. Heuglin's Eh. minimus, first described from Keren in Erythrea (type in the Stuttgart Museum), is a well-marked geographical race of Eh. hipposiderus, differing from the Central European form by its considerably smaller size. At the same time I mentioned that the British Museum possesses an example from Sennar indistinguishable from the type specimen of minimus. A subsequent examination of the whole series of Eh. hipposiderus preserved in the British Museum has revealed the rather surprising fact that Eh. h. minimus is by no means confined to Keren and Sennar, but generally distributed over the Mediterranean Subregion. It differs from the Central European form in being in every respect smaller ; in some respects, as it seems, absolutely smaller, in others at least on an average. I find the length of the forearm to be the best means for a ready discrimination: in minimus, 34‘7-38 mm.; in the typical form, 39-417 mm. For other details, cf. the measurements on p. 143. |