ARTICLE VI. 
THE SKULL AND TEETH OF ECTOPHYLLA ALBA. 
(Plate XVI.) 
BY HARRISON ALLEN, M.D. 
Read before the American Philosophical Society, January 21, 1898. 
In 1892 (Proc. U. S. Nat. Mus., 1892, No. 913, 441), I described a bat from 
Honduras under the name of Lctophylla alba. The single specimen was without skull. 
I have been permitted through the courtesy of Mr. Oldfield Thomas, of the British 
Museum, to inspect a second example of the genus. The material consisted of a dried 
skin and a skull of a male individual which was mutilated by shot in the ptery- 
goid and orbital regions. The specimen was collected at San Emilio, Lake Nic-Nae, 
Nicaragua.* 
The norma verticals shows faint fronto-temporal lines which barely approximate near 
the bregma, but recede from that point posteriorly so that no trace of a temporal crest 
exists. The fronto-maxillary inflation is conspicuous and makes a swollen border for the 
upper and anterior orbital margins. The nasal bones are sharply elevated above the 
plane of the maxilla. Sufficient of the norma dasilaris remains intact to show that the 
hard palate is elongated and the palatal bones are produced, thus separating the genus 
sharply from Stenoderma and its allies and allying it to Vampyrops (see Synoptical 
Key). The basioccipital bone is deeply pitted for muscular impressions. In this respect 
it presents a marked contrast with Vampyrops, in which this bone is nearly fiat. The 
tympanic bone is small, leaying the greater part of the cochlea exposed. The norma 
occipitalis shows a weak occipital ridge. The junction of the ectopetrosal + surface of the 
pars-petrosa with the occipital bone is complete, while in Vampyrops a vacuity exists. 
The lower jaw retains a curved aciculate angle relatively twice the size of the same 
* The skin was badly mutilated by shot and the nose leaf and chin plates so distorted that no attempt is made to 
compare the parts with the original description. The second interdigital space is without pigment, head and neck both 
above and below are pure white. The lower third of the body both on dorsum and ventre is tipped with ash-gray. 
+ I propose naming that part of the pars-petrosa lying in the brain case the endopetrosal, and that lying exposed 
back of the pars-squamosa the ectopetrosal part (Journ. Acad. Nat. Sci., 1896, Philadelphia). 
