4 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 8l 



Skull. — The skull appears to be similar to that of Ncsophohtes 

 micrus. 



Teeth. — As compared with those of Nesophontes micrus the larger 

 maxillary teeth are more robust in general form, a character resulting 

 from the less rapid narrowing of the base of the protocone toward 

 the lingual side of the tooth crown. This peculiarity is especially 

 evident in m^ and in'-, but it is also visible in pm*. This general 

 tendency toward robustness of the cusps appears to be responsible 

 for the main dental peculiarity by which the Haitian and Cuban 

 members of the genus are distinguished from each other. In 

 Nesophontes micrus there is always present, up to the time when 

 this portion of the crown is destroyed by wear, a distinct and often 

 wide notch at the point where the posterior margin of the protocone 

 joins the base of the metacone. In A', parandcrus the bases of the 

 two cusps are so large and well filled-out that they come together 

 directly and smoothly or with at most a faintly developed intervening 

 transverse crease. The same general features are present in the 

 mandibular teeth, where the cusps show a uniform tendency to be 

 heavier and less nearly terete than in the Cuban animal, characters 

 best appreciated on comparison of the mataconid and entoconid of 

 the two species. The heels of the lower molars are quadrangular 

 (longer than broad) rather than squarish in outline and the bottoms 

 of the central convexities tend to be rather broadly rounded instead 

 of narrowly infundibuliform. 



Measurements. — Type: greatest length, 32.4 ± ; palatal length, 

 15.0; glenoid breadth, 12.4; interorbital breadth, 7.4; palatal breadth 

 including molars, 9.2; front of canine to back of ur, 12.2; four 

 molariform teeth (alveoli), y.2. 



Specimens examined. — Skulls, 2; left maxilla, i; mandibles, 18; 

 humeri, 9; femora, 10; innominate, i. 



Remarks. — This species is sharply differentiated from the Porto 

 Rican A^ edithce by its much smaller size, and from the Cuban 

 A^. micrus by the j^eculiarities of its teeth. 



NESOPHONTES HYPOMICRUS sp. nov. 



Plate I, fig. 2 



Type. — Nearly perfect skull (lacking auditory parts, incisors, 

 canines and right median premolar) No. 253077, U. S. Nat. l\fus. 

 Collected in the deep cave near the Atalaye plantation, Haiti, March, 

 1925, by Gerrit S. Miller, Jr. 



