22 NORTH AMERICAN BATS IT. ALLEN. 



The- interest wliicli ;ittiu'li('s to the ostcolojiy ol' the liiiid extremity 

 has led me to gi^'e in moie <letail the t'oHoAviiig: 



In i)teroi)ines the ilium is eurved outward to a slight degree at the 

 erest. The ridge from the upper border of tlie acetabulum isineons[)i('- 

 uous and does not extend entire lengtli of ilium; thus the ventral and 

 dorsal surfaces are uot separated and tlien^ is no special external l>or- 

 der iKMr the crest. The tuberosity of the ischium is detlected markedly 

 from the line of the ilium and lies against the coccj^x. Thepul>is is 

 thickened interiorly; the ])ectiueal spine is absent or scarcely discern- 

 ible. 



In Hipposideros among the rhinolophiues the ilium is expanded and 

 is concave on both dorsal and ventral surtaces. The broad crest ex- 

 tends outward and unites by a broad thin Hange to the tip of the long 

 pectineal spine. Tuberosity of the ischium not i)rqjected backward; 

 nearly the entire pubis and ischium converted into a broad plate of 

 bone at the expense of the thyroid foramen. Symphysis pubis long, 

 entire. The trochanters of the femur are draM n backward ami a^)- 

 proximated; the inner trochanter is the longer; the outer side of the 

 shaft below the head furnished with a flange. The condyles small and 

 separated by a wide notch. In the tibia the sjjiue for hamstrings com- 

 pressed. Internal tuberosity prolonged; no mallelus. 



In j)hyllostondnes the ilium is not. detlected at crest. As seen in 

 Artibeus the ridge above the acetabulum rudimental as in pteropines — 

 the ventral and dorsal surfaces therefore scarcely distinguished. The 

 external border below the crest is rugose and enormously thickened. 

 The ischium is turned but slightly toward the coccyx. The inferior 

 border of the pul)is produced inward as a long blunt i)rocess and the 

 upper border forms a h)ng acicnlar process (pectineal eminence) which 

 extends one-half the length of the ilium. The trochanters of the femur 

 not carried back, the outer not separated from the head by a notch. 

 The inner is much longer tliau the outer. The shaft at its inner side 

 at the proximal fifths exhibits a consi)icuous crest. The condyles are 

 of equal size. Above them posteriorly is a depression (best uiarked 

 over inner condyle) to receive in forced Hexion the posterior border of 

 the articular surface of the tibia. Intercondylar notch, i)it-like. Prox- 

 imal end of the tibia with scarcely any inward projecting process; 

 malleolus none; tubercle for insertion of hamstrings nnirkedly devel- 

 oped; surface for articulation with the tibula rngose. 



In Hemidcrma the innominate is nnich as in Artibeiis, but the pubis 

 not projecting or thickened; the pectineal spine but one-third the 

 length of the ilium. The femur quite as in this genus, but the outer 

 trochanter separated by a notch from the head. In Macrotus the in- 

 nominate bone much the same as above, but the i)ectineal spine over 

 one-half the length of the ilium. The trochanters of the femur approxi- 

 mated and carried well to the back of the shaft. The tibula only half 

 the length of the tibia. 



