1889.] OUO [Allen. 



The palatal rugre opposite molars not angulated, but slightly curved, 

 the curve being forwards. 



Dental formula the same as in the preceding species. 



The first maxillary premolar in JV. orthotic is in the outer angle between 

 the second premolar and the canine. It is smaller than in N. inaerotis. 

 The postero-internal cusp of the first and second maxillary molars con- 

 tinuous with a single cresceutic cingulum. The cingulum of the third 

 molar of the same series of a single cresceutic form. Mandibular incisors 

 four. The first mandibular premolar touches canine. 



In N. maerotis, the first maxillary premolar is in dental arch, i.e., is neither 

 in outer or inner angle formed by the crowding of the canine tooth and 

 the first premolar, but is in the axis of the dental series. The postero- 

 internal cusp of the first and second maxillary molars separate from the 

 double crescent form of the cingulum. The cingulum of the third molar 

 of the same series of a double cresceutic form. 



Measurements, 

 mm. 



Length of head and body 68 



Height of ear 20 



Length of forearm 57 



" "thumb 5 



" "2d metacarpal bone 22 



" 3d " " .... 25; 1st ph. 



" 4th " " .... 24 ; 



" 5th " " .... 12; " 



" tibia 20 



" foot 7 



" " tail in membrane 25 



"tail free 9 



Habitat, Jamaica. The single specimen is a skin in the collection of the 

 National Museum (No. 9397, W. T. March), and was received from Span- 

 ishtown. 



I have been minute in the description of these new forms for the reason 

 that diagnoses of species have hitherto been too general. Some of the 

 characters, such ais the shapes of the terminal phalanges, the patterns of 

 the wing membranes, the depth of the notch in the auricle and the point of 

 termination of the auricular flange or hem have not been used in studying 

 Cheiroptera. Even if the attempt to establish new characters should fail, it 

 is of interest to record these novel details of structure. 



