2. Rhinolophus megaphyllus Gray.

(Plate III. fig. 2 5, c.)

Diagnosis. Allied to Rh. simpleX, but considerably larger. Forearm 46-50 mm.

Details. This is a large continental representative of the simpleXtype. The evidences of its close connection with the Lombok species are clear enough: the general shape of the facial portion of the skull; the wide interspace between the upper canine and p4; the presence, individually at least, of an extremely narrow interspace between p2 and p4; the distinctly constricted sella; the strong development of the nose-leaves; the large ears. On the other hand, it has in several respects taken its own course of development: the sella is, also proportionately, broader than in simpleX, the constriction at the middle is more abrupt; the nasal swellings are, also proportionately, considerably broader; the size of the animal is markedly increased: as regards this latter, Rh. megaphyllus bears quite the same relation to Rh. simpleX as Rh. rouXi does to Rh. borneensis .

Distribution *. Eastern Australia. Louisiade Archipelago.

Geographical races. There are two apparently well-marked forms of Rh. megaphyllus, differing in size and in geographical habitat.