156 PROCEEDINGS OF THE ACADEMY OF 



The remarks quoted below also coincide with the statement of Mitchell 

 " takes the hook, if baited with dough, when let down through holes in the 

 ice, at mid-winter." 



"This fish, so far as I am acquainted with it, frequents swift, clear and deep 

 water, often rising to the surface to catch grasshoppers, toads that have fallen 

 in the water, &c. This fish takes the bait more vigorously in cold than 

 warmer weather. The young are found, during the latter part of summer, in 

 very shallow water, generally frequenting stony banks ; at this time they are 

 exceedingly shy, and refuse a sinking bait, but would probably take the fly 

 of the trout-fisher. This fish is more numerous in the contiguous streams 

 than in the Delaware." J. Walter Vroom. 



Note on Hypognatuus nitidus, Gir. 



This species proves very abundant in many of the streams in the neighbor- 

 hood of Trenton, N. J. It in no manner differs from specimens taken from 

 Lake Champlain, the original locality. We suspect this to be the southern- 

 most extent of its geographical distribution, as the author has seen undoubted 

 specimens of //. regius, Gir., taken in the Delaware, nineteen miles below 

 Trenton. 



It is generally found associated with Semotilus atromaculatus and Luxilus 

 Americanus, though it sometimes appears to be the sole representative of the 

 Cyprinoids in many streams of considerable extent, as indeed do both of the 

 other mentioned species. Its preference is decidedly for rapid water, as far 

 as we have observed, which is the ease with the former, but not with the 

 latter of the two above-mentioned species. 



Descriptions of new PTEROPINE BATS from Africa. 

 BY HARRISON ALLEN, M. D. 



Hypsianathus, n. g. Head large, massive. Face greatly developed, ante- 

 rior portion humped. Nose very high, blunt, corrugated. Nostrils produced ; 

 opening laterally ; bounded internally and inferiorly by a projection of the 

 eoriaceous membrane, which by its continuation externally forms a lateral 

 fold. This expansion, after descending from the posterior part of the nostril 

 to the lip, runs along the line of the upper jaw, forming the outer wall of a 

 distinct groove, the inner wall of which is made by the true lip. Just as this 

 remarkable membrane turns down from the anterior nares, it also extends 

 forward, clearly defining the boundaries of the snout. From the lower ante- 

 rior part of each nostril a leathery ridge extends to the mouth. These divide 

 the muzzle into three distinct sulci. The chin is peltated, and indistinctly 

 divided into halves by a mesial line. Ears small, naked, without tragus and 

 tufted at base. Wings thrown very far back. Basal joint of thumb small. 

 Index finger clawed. Interfemoral membrane small, ecaudate. Lower in- 

 cisors closing anterior to the upper. 



3 14 1 3 



Dental Formula, m -, c -, i -, c -, m - = 28. 

 5 14 1 5 



Skull remarkably high. Nose broad at summit, occasioned by the develop- 

 ment of the nasal bones. Extending from the canines to near the top of the 

 face is an irregular ridge for the insertion of the curious nasal membrane al- 

 ready noticed. The infra-orbital foramen opens posteriorly to the entire 

 dental series. The skull is broader between the eyes than in other Pteropines. 

 Post-orbital processes stout, short and pointed outwards and backwards. 

 Cranium small, comprising but a third of the entire head. A parietal crest is 

 present for about two-thirds its length, when it abruptly terminates at the apex 

 of a small triangle which is formed by the want of approximation of the hinder 



[July, 



