CTNOPTERTJS. 591 



whole of the interdental and the anterior portion of the postdental 

 palate, and separated by a narrow ridgeless space from two thin ridges 

 near the palation border. From the anterior ridge, which is flatlv 

 convex, sometimes nearly straight, the ridges become gradually 

 more strongly curved or hastate posteriorly ; the two (or three, 

 four, or five) posterior of the principal set are slightly divided at 

 middle, the two palation-ridges usually distinctly divided. Specific 



Fig. 50.— ralatc-iidges of Cyiitqiicrus hrachyolls (94.G.10.2). 

 f (lineal-). 



variation very small ; the larger species possess usuiilly twelve or 

 eleven, the smaller ten or eleven ridges in front of the ridge- 

 less space. The number of ridges is somewhat greater and the 

 arrangement more crowded than in liousettus (fig. '2.\) A, p. 485). 



External characters. — Muz/.le short and stout, centre of eye in the 

 middle between base of ear and tij) of u\\v/,/.\q ; nostrils subtubular, 

 directed obliquely forward and outward ; odontoid papilla? fringing 

 inner side of upper and lower lips (from angle of mouth to points 

 opposite fronts of p^ and Pj) unusually large, numerous, and crowded 

 (posteriorly as a rule arranged in three rows, then in two, aiiteriorly 

 in a single row). Ears moderate, reaching hinder canthns or centre 

 of eye, tip narrowly rounded off ; autitragal lobe small, sub- 

 triangular or rounded, generally perfectly distinct, sometimes rudi- 

 mentary, but scarcely ever completely obsolete. Tail always shorter 

 than (about one-half to three-fourths of) hind foot with claws, 

 connected with interfemoral by its dorsal integument, extreme tip 

 free (caudal vertebrio four). C'alcar short, one-half to one-third of 

 hind foot with claws. 



Lateral membranes widely separated at origin from sides of back, 

 inserted posteriorly on first toe (tip of metacarpal, or base or 

 proximal half of first phalanx). Vertical fasciae of mesopatagium 

 (those crossed by internal cutaneous line) about 1.5-25, rather 

 narrowly spaced. Basal fourth or fifth of first phalanx of poUex 

 included in membrane. Index clawed. Third metacarpal equal 

 to about tTvo-thirds of forearm ; fourth always slightly but distinctly 

 shorter than third, fifth usually a trifle longer than fourth but 

 shorter than third. Terminal phalanx of third digit much shorter 

 than metacarpal of same digit ; terminal phalanx of fourth digit 

 always, that of fifth usually, a little longer than proximal phalanges. 

 Subjoined, the wing-indices of Cijnoj^tenis calculated from measure- 



