6 bulletin: museum of comparative zoology. 



The fragment contains traces of two roots of a j^ms, and a nearly 

 complete prrii which, as in N. edithae, is two-rooted with a prominent 

 posterior cinguhmi cusp. Both first and second lower molars have a 

 cingulum on the anterior half of the outer aspect. Their cusps are 

 sharp, the paraconid equalling the hypoconid in vertical height. The 

 protoconid is higher than the metaconid, which it nearly hides in 

 side view, though its summit is a very little posterior to that of the 

 metaconid. The entoconid and the hypoconid are of equal height, 

 the former very slightly anterior to the latter in side view (Plate, 

 fig. 14). There seems to be also a minute hypoconulid. The condyle 

 of the jaw is not in condition for thorough comparison. 



Measurements. — Front of -pmi to ascending process of mandible, 

 7.5 mm.; front of piiii to back of mi, 5.5; length of mi, 2.3; of m^, 

 2.0; depth of ramus at front of ?/?2, 2.4. 



Specimen examined. — The type. 



Remarks. — While agreeing in the general structure of the teeth so 

 far as this can be determined from the specimen, there are such e^'ident 

 differences of proportion and size as to render it unlikely that this 

 jaw is from a species of Nesophontes. Nevertheless the similarity 

 is sufficient to associate it with that genus until better material may 

 be discovered to prove its relationships are otherwise. Certainly the 

 present fragment is insufficient for the founding of still another genus. 

 The teeth are of a rather primitive type and clearly indicate a fourth 

 species of Antillean insectivore. 



RODENTIA. 



BOROMYS TORREI, Sp. nOV. 



Plate, fig. 10-13. 



Type. — A palate with root of right zygomatic arch, pm^ and alveolar 

 row of right side, vi^ and posterior part of alveolar row of left side, 

 M. C. Z. 9601. From a cavern in the Sierra of Hato-Nuevo, Province 

 of Matanzas, Cuba. Carlos de la Torre. 



Description. — Resembles Brotomys voratus of San Domingo and 

 Boromys offclla of Cuba, but difters from both in its much smaller 

 size and the deeper indentation of the posterior emargination of the 

 palate, which reaches forward to the level of the center of m"^. It is 

 not possible to determine whether there is a supplemental groove at 

 the base of the antorbital foramen, the chief cranial character distin- 



