NO. 9 MAMMALS FROM CAVES IN HAITI MILLER 5 



Characters. — Like Nesophontcs paramicrns but constantly smaller 

 (see pi. I and detailed comparisons under "remarks") ; triangular 

 outline of m^ and ;;;- in palatal aspect narrower ; heels of mandibular 

 molars shorter, their concavities narrowly funnel-shaped at base as 

 in ^V. micriis. 



Skull. — Except for its smaller size the skull appears to be essen- 

 tially similar to that oi N. paramicrns. 



Teeth. — The upper teeth in four individuals differ constantly from 

 the two specimens oi N. paramicrns in the narrower triangular outline 

 of the crowns of /;/' and iir. In the mandibular teeth the heel of 

 each molar is shorter, though this character is usually more 

 pronounced in iih and tiio than in nis. 



Measurements.— Type : greatest length. 27.6 ; condylobasal length, 

 26.8; palatal length. 12.8; glenoid breadth, 10.6; interorbital breadth, 

 5.8; palatal breadth including molars, 7.2; depth of braincase 

 (median). 6.4; fronto-palatal depth l)ehind molars, 5.2; front of 

 canine to back of ;/;^, 9.8; four molariform teeth (alveoli), 6.0. 



Spceinieiis examined. —SkuWs, 4; left maxilla, i; mandibles, 24; 

 humerus, 1 ; femora, 6 ; innominates, 3. 



Remarks. — That the original series of Nesophontes skulls from 

 Porto Rico presents a range of variation in size which is unprec- 

 edented among other dilambdodont insectivores is well known. This 

 fact has been attril)uted to sexual dimorphism and as such has been 

 made a part of the diagnosis of the family Nesophontidce (see 

 Anthony, Mem. Amer. Mus. Nat. Hist., n. s., Vol. 2, p. 365 " June " = 

 October 12, 1918; Bull. Amer. Mus. Nat. Hist., Vol. 41, pp. 633, 

 635. December 30, 1919). The same conditions, though less well 

 marked, were noticed by Anthony in a series of 33 skulls and 150 

 mandibles of the Cuban Nesophontes micrus (Bull. Amer. Mus. Nat. 

 Hist., Vol. 41, p. 633, December 30, 1919). Through Mr. Anthony's 

 kindness I have had the opportunity to examine the entire series of 

 Nesophontes jaws in the American Museum of Natural History, and 

 as the result of this examination I am convinced that the differences 

 in size shown by the Cuban and Porto Rican series are probably not 

 due to the same causes as those which have produced the analogous 

 dift'erences that occur in the Haitian material. 



Among 26 jaws of the Porto Rican Nesophontes edithce in suffi- 

 ciently good state of preservation to give the two most important 

 measurements, namely, distance from articular process to anterior 

 face of first molar, and depth through coronoid process, these vary 

 from 16.2 to 22.2 mm. and from 9.0 to 13.2 mm. respectively. This 



