STENODEBMATA. 511 



0"-65, 2nd ph. 0"-82, 3rd ph. 0"-5 ; fourth finger— metacarp. 1""5, 

 1st ph. 0"-45, 2nd ph. 0"-55 ; fifth finger— metacarp. l"-45, Ist 

 ph. 0"-35, 2nd ph. 0"-5 ; tibia 0"-62, foot 0"-42, calcaneum 0"-26. 

 Hah. Mexico; Guatemala. 



«. $ ad., al. Duenas, Guatemala. 0. Salvin, Eaq. [C.l. 



b. ad. sk., al. Duena8, Guatemala. 0. Salvin, Esq.:[C.j. 



2. Choeronycteris minor. 



Choeronycteris minor, Peters, MB. Akad. Berl. 1868, p. 3G6. 



Considerably smaller than Oh. mexicana, and with shorter ears, 

 which are also less deeply emargmate externally ; the calcaneum is 

 conspicuously longer than the foot. Colour and distribution of the 

 fur as in Oh. mexicancc ; dentition also similar (Plate XXVII. 

 figs. 6, 6 a). 



Length, head and body 2"-2, tail 0"-26,head 1", ear 0"-48, tragus 

 0"-15, nose-leaf 0"-15x0"-13, forearm l"-35, thumb 0"-28, third 

 finger— metacarp. l"-35, 1st ph. 0"-48, 2nd ph. 0"-7, 3rd ph. 0"-45; 

 fourth finger— metacarp. l"-25, 1st ph. 0"-34, 2nd ph. 0"-4; fifth 

 finger— metacarp. 1"-15, 1st ph. 0"-3, 2nd ph. 0"-4; tibia 0"-45, 

 calcaneum 0"'44, foot 0"-32. 



Hab. Surinam. 



a. skull, Rio Cupari. H. W. Bates, Esq. [0.]. 



(Eigured in Plate XXVII. figs. 6, 60.) 



Group 3. STENODERMATA. 



Stenodermata, Peters, MB. Akad. Berl. 1866, p. 257. 



Muzzle very short and generally broad in front, the distance be- 

 tween the eyes nearly always exceeding, rarely equal to, the distance 

 from the eyes to the extremitj' of the muzzle ; nose-leaf generally 

 short, horseshoe-shaped ia front and lanceolate behind (except in 

 Brachyphylla and Centurio), the horizontal portion surrounding the 

 nasal apertures ; interfemoral membrane always concave behind ; 

 tail none ; iuner margin of the lips fringed with conical papiUse. 



■TV .-.• T 4 4 2—2 3—3 2—2 2—2 



Dentition. Inc. j or -^, pm. ^^, m. ^^ or ^-^ or g^j- " 



Premolars and molars very broad (except in Sturnira), the latter 

 with broad concave or fiat crowns, margined externally by raised, 

 narrow, notched cutting-edges, without trace of W-shaped cusps 

 (see Plate XXIX.). 



Comparison of the dental formulae of this group and of the Vampijri 

 shows that in the Stenodermata the number of the premolars is con- 

 stant and that of the molars is variable, while the reverse is the 

 case in the Vampyri. In this respect, as well as in the form of 

 their molar teeth, the insectivorous Vampyri agree with other 

 groups of insectivorous Bats ; while the frugivorous Stenodermata, 

 in their concave crowned and variable molars, resemble many of the 



