NO. 9 MAMMALS FROM CAVES IN HAITI MILLER 7 



accuniulation of much more abundant material; but it now appears 

 obvious that the variation in Haitian Nesophontes is different in char- 

 acter from that which is presented by the members of the genus 

 occurring in Porto Rico and Cuba, and that the course which does 

 least violence to probability may be followed by recognizing two 

 species among the larger Haitian specimens, separated from each 

 other by absolute differences in size and by easily appreciable 

 structural characters of both maxillary and mandibular molar teeth, a 

 condition which is not known to be due to sexual dimorphism in 

 any insectivore. 



NESOPHONTES ZAMICRUS sp. nov. 



Plate I, fig. 3 



Type. — Anterior part of skull with coni])lete palate ( teeth lacking 

 except pin- left and the molariform teeth of both sides) No. 253090, 

 U. S. Nat. M*is. Collected in large cave near St. Michel, Haiti, March, 

 1925, by Gerrit S. Miller, Jr. 



Characters. — Size much less than in any hitherto known member 

 of the genus; palatal length, 10.6; four largest maxillary teeth, 5.0; 

 four largest mandibular teeth, 5.6. 



Skull. — Except for their smaller size the two imperfect skulls of 

 this animal do not show any appreciable characters by which they 

 can be distinguished from those of Nesophontes hypomicrus. The 

 type gives the impression of greater slenderness, but this may be due 

 to its small actual size. The ratio of palatal width to palatal length 

 in the type is 54.7 and of palatal depth (at posterior margin) to 

 palatal length is 37.7. In both of the two skulls of M. hypomicrus these 

 ratios are 55.4 and 40 respectively, a difference which appears to be 

 \^hin the limits of reasonably looked-for individual variation. A 

 greater difference is seen in the ratio of length from hamular process 

 to depth including hamular process : 39.3 in A'', zamicrus, 42.7 in 

 A'^. hypomicrus. Still greater is that between the ratio of rostral width 

 at level of canine to palatal length : 24.5 in A'', zamicrus, 30.7 in 

 A^ paramicrus. Whether or not these peculiarities are anything more 

 than individual is a question which must for the present remain open. 



Teeth. — The teeth, except for their smaller size, resemble those 

 of Nesophontes hypomicrus in all the characters which distinguish 

 this animal from A'^. paramicrus. 



Measurements. — Type: palatal length, 11. o; glenoid breadth, 7.8; 

 interorbital breadth, 5.0 ; palatal breadth including molars, 5.8 ; front 

 of canine to back of w^ 8.2; four molariform teeth (alveoli), 5.0. 



