
752 The American Naturalist. [August, 
molar is equal to the first instead of the = its size, and sectionally is 
quadrangular instead of triangular. 
Comparative measurements of minor and senex in millimeters, 
those of latter species reduced from measurements in inches given by 
Dobson : 
C. minor. C. senex. 
Length of head and i (es eo ar aDOut) 65 77 
Length of head .. . Btn os Og ghd ees. es ne E 25 
BRIN OF ORE er a BC eee ee ee sie T 17 
TRG GF agi Oe a 4 7S 
Length of forearm eee ae yee ce cece SAO 53 
Length of thumb .. See oe eee cr ere 13 
Length of second nae KERER PR eee 2 oe oe 38 
Length of third ET: 
Metacarpal : we PE. 38.5 
First phalanx . 14 27.5 
Second phalanx ... 22 23 
Third phalanx? ‘ ‘ II 15.5 
Length of fourth finger : 
Metacarpal e 6262. ans eR ee a en, 34 34 
Eet WAIN os ioe gee ve eS eke ee 84S 14 
Second SIAN r on eee Sega FS 14 
Length of fifth finger : 
Metacarpal . 36 35-5 
PASE DURRS o oo a gh ace oe 14. 15 
Second phalanx . . 12.5 14 
Interspace between tips of third sad fjürnth Sora 32 
Interspace between tips of fourth and fifth fingers 45 
Interspace between tip of fifth finger and foot . . 52 
Extent of outstretched wings 
ee ee 277 
Eene OF UDA o os Ss a ee AG 17 
bepgth of chicaretm = ooe an ee SG 6.5 
ROMER OL ORA a ao” a aa a FA 10 
In three of these measurements, —fż.e., thumb, fourth metacarpal, and 
tibia,—the two species measure the same; in three others,—z.¢., first 
phalanx of fourth finger, fifth metacarpal, and foot, minor is the larger; 
in all the other thirteen comparative measurements it is the smaller. 
The difference in length of forearm, 12.5 mm., is much more than I 
1 This is greatest possible measurement,—i. e., taken on extreme outer margin ; that of 
inner margin is 2.5. 
2 This is the osseous phalanx; with cartilaginous tip itis 14. 



