ON THE GLOSSOPHAGIN &#. 249 
is smaller than in the genus just named. The thick skull does not admit of the divisions 
of the brain being discerned. The lower jaw is more robust—the depression in advance 
of the angle most marked of any genus in the group; the angle is raised high above the 
level of the lower border of the high ramus as in the Lobostomina; the symphysis is pro- 
vided with a large keel. 
On the whole the skull is more robust in texture and is of a larger animal than 
Glossophaga, but the face structures more extended, and presumably from the symphysal 
modifications, a longer and more prehensile tongue. 
The Upper Teeth.—The incisors are not arranged in a continuous row or in pairs, but 
intervals* are found between the teeth. 
The space between the central incisors is wider than that between these teeth and 
the laterals. The central incisors are obscurely hatchet-shaped, while the laterals are 
conical. Wide intervals also exist between the canine and the first premolar and between 
the first and second premolars. The other upper teeth are contiguous. The premolars 
are aciculate, compressed, with prominent base conules. The first and second molars are 
quadrate with conspicuous hypocone. The third molar is more triangular and resembles 
the first and second molars of Gilossophaga. 
The Lower Teeth.—TVhe incisors are reduced to tubercles, arranged in pairs, which are 
widely separated both from the symphysis and the canine tooth, though nearer the latter 
than the former. The central incisor is larger than the lateral. All the other teeth are 
contiguous, except the second and third premolars, which are separated by an interval 
equaling that in the upper series. The first premolar is distinctive. It closely resembles 
the homologous tooth in Glossophaga and anteriorly overlies the base of the canine. The 
second and third premolars are similar to those in the upper jaw. The molars are of the 
same type as in Glossophaga, but elongated and compressed in advance of the protocone 
- and paracone as in Leptonycteris. 
The comparison of the skull and lower jaw seen from in front with Glossophaga is 
instructive in the differences in the shapes and relations of the shapes of the teeth already 
noted. ‘The upper canines are observed to be longer and more trenchant in Jonophyllus 
than in Glossophaga. 
Rugee ten in number, the anterior five undivided and the posterior five divided. 
Measurements of Monophyllus redmani. 
Millimeters. 
Head and body (from crown of head to base of tail)... 
Length of arm 
Length of forearm. ............cccsccee seeeeeseeeecanesseceneeees sadocdosncna9sHs8 2060 sosNanSEcOSHONERaGAASHESETESTOUeC 37 
*According to Dobson’s text, the upper incisors are in a continuous row, but they are figured with an interval 
‘between the central incisors. In the table of genera all the upper incisors are said to be arranged in pairs. 
