MUSEUM OF COMPARATIVE ZOOLOGY. L55 



rounded convexity of equal width with the exposed portions of the endo- 

 turbinals. The second endoturbinal appears as a nodule between the 

 transverse lamina and the second endoturbinal ; the third and fourth 

 much as in other genera, the lower border of the third plate being visi- 

 ble from the lower edge of the series. 



Rhynconycteris naso. — The ectoturbinal absent. The remaining three 

 endoturbinals closely resemble one another. The first projects in ad- 

 vance beyond the third no more than the third projects beyond the 

 fifth. The free portion of the first small, yet reaches the level of the 

 anterior of the second premolar. The plates on the median surface 

 while contiguous leave exposed a larger surface than is the case in any 

 other genus of the Molossi. 



Noctilio leporinus (Plate VII. fig. 5). — The ectoturbinal inflated nearly 

 twice the thickness of the first endoturbinal, and nearly equalling it in 

 length. The median aspect of ethmoturbinal closely resembling Molos- 

 sus. The free portion of each plate of about equal width. The naso- 

 turbinal of great width anteriorly, and almost entirely concealing the 

 maxilloturbinal. 



Jlormops megaphylla. — The encranial surface presents the following 

 features. The single ectoturbinal foramen is small. That for the first 

 endoturbinal is conspicuous. The extent of the non-perforate space ap- 

 pears to be enormous as compared with the same space in other genera. 

 The ectoturbinal is a mere rounded point at the base of the first endo- 

 turbinal. The endoturbinal series closely resembles the same in the 

 Vespertilionidax The first endoturbinal is without the lobe present in 

 Chilonycteris. Its under surface is concave at the free produced portion, 

 and conceals the unusually long maxilloturbinal. The second ethmotur- 

 binal is very slender and oblique. It is continuous above with the first 

 thus differing from the arrangements seen in Vespertilionidse. The 

 third plate is obscure, if not absent. It is apparently continuous with 

 the crista galli. 



Chilonycteris rubigvnosa. — The first ectoturbinal Bubgloboee, one 

 fourth the length of the first endoturbinal. The free projecting por- 

 tion of the first endoturbinal is deeply concave beneath, and completely 

 covers in the maxilloturbinal, as in the Vespcrtilionida\ It reach 

 far as the first premolar. This plate bears upon its summit a lobule, as 

 in the Phyllostomidiihe. The second and third endoturbinala are simple, 

 non-rcvolute, nearly vertical, the third being the broader. 



Bes)iioi/ns rii/i/s (Plate VII. fig. 1). — The ectoturbinal is inflated, and 

 nearly the length of the firs! endoturbinal. The first endoturbinal is 



