Packard.] 
482 
[Feb. 19, 
Table. 1 
§a 
gg 
5 £| 
g 
00 65 
35 . 
§33 
MEAN DIMEN- 
SIONS OP 
BULBS. 
W (M 
° S 
§2 
05 § 
ca h 
P < 
P 3 
Mo 
MEAN DIMEN- 
SIONS OP 
BULBS. 
P M 
M H 
e J 
SM 
fc > 
osS 
« 3 
s p 
p 
SZS 
LENGTH. 
GREATEST 
TRANSVERSE 
DIAMETER. 
p 5 
O K -a) 
h'So 
jfs 8 
M « 
M H 
■< 
pM 
o ^ 
« p 
P M 
H 
o 
!zi 
M 
GREATEST 
TRANSVERSE 
DIAMETER. 
Bandicoot ( P.na - 
suta ). 
3 
2,160 
mm. 
0-070 
mm. 
0-043 
Present. 
mm. 
0-060 
mm. 
0.030 
Bat ( V. subula- 
tus). 
2 
800 
0-026 
0-014 
? 
Muskrat (F. zi- 
bethicus). 
1 
520 
0-050 
0-027 
Present. 
800 
0-046 
0.027 
Woodchuck (A. 
monax). 
3-5 
800 
0-060 
0-032 
Do. 
0 057 
0-035 
Poi’cupine ( E . 
dorsatus ). 
2 
0-054 
0-024 
Do. 
0-048 
0 027 
Gray squirrel (S. 
carolinensis) . 
3 
750 
0 057 
0-032 
Do. 
2,200 
0-052 
0-028 
Red squirrel (&. 
hudsonius). 
3 
1,200 
0-054 
0-024 
Do. 
4,500 
0-051 
0 021 
American hare 
( L.americanus ). 
2-3 
1,200 
0 051 
0-033 
Do. 
8,000 
0-056 
0-035 
Rabbit, 
2 
2,400 
0-050 
0-033 
Do. 
14,500 
0 055 
0.036 
Horse, . 
2-3 
0-080 
0-070 
Do. 
. . . 
. . . 
Pig- . - 
2 
1*0,760 
0-092 
0-036 
Do. 
4,800 
0-066 
0*033 
Sheep, . 
24 
9.600 
0-085 
0-045 
Wanting. 
. . . 
. . . 
Ox, 
24 
35,200 
0-100 
0-040 
Do. 
. . . 
. . . 
Goat, 
12 
15,400 
0-062 
0-030 
Do. 
. . . 
. . . 
Cat, 
6 
600 
0-070 
0-032 
Do. 
. . . 
Dog, 
Fox ( V.vulgaris). 
4-6 
. . . 
0-071 
0-040 
Present. 
. . . 
4 
9,500 
0-042 
0-020 
Do. 
0.045 
0-02i 
Skunk (M. me- 
phitica ). 
2 
4,000 
0-045 
0-028 
Wanting. 
Mink (P. vison). 
4-5 
2,000 
0-039 
0-024 
Rudi- 
. . . 
. . . 
Raccoon (P. Lo- 
tor). 
7-10 
14,400 
0-055 
0-023 
mentary. 
Present. 
0.045 
0.021 
Man, 
9 
6,000 
0-079 
0-040 
Do. 
*3,000 
0.070 
0.038 
THE LIFE-HISTORY OF DREPANA ARCUATA, WITH REMARKS 
ON CERTAIN STRUCTURAL FEATURES OF THE LARVA 
AND ON THE SUPPOSED DIMORPHISM OF DREPANA 
ARCUATA AND DRYOPTERIS ROSEA. 
BY ALPHEUS S. PACKARD. 
The epocli-making work of Weismann , 2 and the writings of Fritz 
Muller, Meldola, Lubbock, W. H. Edwards, Mr. S. H. Scudder, 
x The bulbs of the circumvallate papilla of the flying phalanger ( B . arid ) measure 
0.042 mm. in length and 0.022 mm. in breadth. On one of the gustatory ridges of Orni- 
thorhynchus , Poulton estimated the number of bulbs to the square millimetre of sur- 
face at about 500. 
“Studies in the theory of descent. English translation, 2 vols., London, 1882. 
