—— longipilis 55 —— Magellanicus 47 —— micropus 61 —— Musculus 38 —— nasutus 56 —— obscurus 52 —— Rattus var. Insularis 35 —— Renggeri 5 —— tumidus 57 —— xanthopygus 63 —— xanthorhinus 53 Myopotamus Coypus 78 Octodon Cumingii 82 Phyllostoma Grayi 3 —— perspicillatum 4 Poephagomys ater 82 Reithrodon chinchilloïdes 72 —— cuniculoïdes 69 —— typicus 71 Vespertilio Chiloensis 5 LONDON: PRINTED BY STEWART AND MURRAY, OLD BAILEY. MAMMALIA, Described by GEORGE R. WATERHOUSE, ESQ. CURATOR OF THE ZOOLOGICAL SOCIETY OF LONDON, ETC. ETC. WITH A NOTICE OF THEIR HABITS AND RANGES, BY CHARLES DARWIN, ESQ. M.A. F.G.S. &c. CORRESPONDING MEMBER OF THE ZOOLOGICAL SOCIETY. MAMMALIA. FAMILY—PHYLLOSTOMIDÆ. DESMODUS D’ORBIGNYI. PLATE I. Natural size. Skull, teeth, &c. Pl. XXXV., figs. 1. _D. pilis nitidis adpressis; corpore suprà fusco, pilis ad basin albis; gulâ abdomineque cinerescenti-albis; nasûs prosthemate parvulo bifido._