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Show 1905.] OF THE GENUS RHINOLOPHUS. 87 is the true reason of the exceedingly confused state in which this group of Bats has remained, making a safe determination of specimens procured almost impossible. Geographical races. There seems to be two forms of Rh. borneensis, differing, slightly, in the size of the ears, and in geographical habitat. 6 a. R hinolophus borneensis Peters, typicus. Rhinolophus Borneensis Peters, MB. Akad. Berlin, June 25th, 1861, p. 709. Rhinolophus minor (partim, nec Horsf.), Peters, MB. Akad. Berlin, 1871, p. 306 ; Dobson, Cat. Chir. Brit. Mus. (1878) p. 114. Rhinolophus affinis (partim, nec Horsf.), Dobson, op. cit. (1878) p. 112. Diagnosis. Ears slightly shorter: 16-17 mm., and narrower: 12*2-12'8 mm. Forearm 41 '2-43*7 mm. Details. In one specimen (from Banguey Isl.) the summit of the sella is completely square-cut; in the others (Labuan, N.W. Borneo) it is broadly rounded off. This is, no doubt, an individual variation, but, it would seem, of more frequent occurrence in individuals inhabiting smaller islands (cf. Rh. megaphyllus monachus, Rh. nanus, Rh. truncatus, Rh. borneensis spadix). Measurements. On p. 88. Distribution. N.W. Borneo ; Labuan; Banguey. 6 b. R hinolophus borneensis spadix Miller. Rhinolophus affinis rouxi (non Temm.) Thomas, Nov. Zool. i. (1894) p. 656. Rhinolophus spadix Gerrit S. Miller, Jr., Proc. Wash. Ac. Sci. iii. (March 26th, 1901) p. 136. Diagnosis. Ears slightly longer: 17-19‘5 mm., and broader: 12'5-14'2 mm. Forearm 42,5-46,3 mm. Details. In one specimen (Sirhassen Isl.) the summit of the sella is completely square-cut; in all the others (one of them from the same island) it is broadly rounded off. Measurements. On p. 88. Distribution. S. Natunas (Sirhassen); Karimata Group (Kari-mata and Pulo Sarutu). Technical name. The type of " Rh. s p a d ix in the Washington Museum, is from Sirhassen. There is a specimen from the same island in the British Museum. I am indebted to Mr, Miller for the loan of a paratype, also from Sirhassen, and of the series from the Karimata Group, collected by Dr. Abbott. Remarks. I should not have separated these two forms (if they be so) of borneensis, if the latter of them had not, accidentally*, got a name. There is no tangible difference in the skulls, not even * When describing Rh. spadix as a new species, Mr. Miller compared it with Rh. affinis. He could not, very well, compare it with Rh. borneensis, which was regarded as identical with Rh. minor. |