MUSEU:\I OF COMPARATIVE ZOOLOGY. 155 



rounded convexity of cqnal width with the exposed portions of tlic 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 froni the lower edge of the series. 



Ji/n/nconi/cte)'is naso. — The ectoturl)inal absent. The remaining three 

 eudoturl)inals closely resemble one another. The first ]ir<ijects in ad- 

 vance beyond the third no more than the third pi'ojects be3-oud tiie 

 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 exjioscd a larger surface than is the case in any 

 other genus of the IMolossi. 



Noctilio leporlims (Plate YIT. fig. 5). — The ectotm-binal inflated nearly 

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

 length. Tlie median aspect of ethmoturbinal closely resembling Molos- 

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

 turbinal of great width anterioi'ly, and almost entirely concealing the 

 maxillotiu-binal. 



Mormoi^s merjaphylla. — The encranial surface presents the following 

 features. The single ectotui'binal foi-amen 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 

 Vespertilionida;. The first endoturbinal is without the lobe present in 

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

 and conceals the unusualh- long maxilloturliinal. The second ethmotur- 

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

 thus differing from the arrangements seen in Vespertilionidic. The 

 third plate is ol)scure, if not absent. It is apparently continuous with 

 the crista galli. 



ChUonycteris ruhiginosa. — The first ectotnrltinal subglobose, one 

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

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

 covers in the maxilloturbinal, as in the Vcspertilionidic. It reaches as 

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

 in the Phyllostomidida!. The second and third endoturbinals are simple, 

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



Desmodus rvfus (Plate VII. fig. 1). — The ectoturbinal is inflated, and 

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



