102 BULLETIN OF THE 
immaturity in addition to the one already noted in the second pair of pleo- 
pods. The measurements are in millimeters, and the proportion of each to 
the length of the body is indicated by the accompanying decimal. 
MEASUREMENTS. * 
. B. |F.0.'F. C.|F. C. 
Syscenus infelix H. one | lato ji fog 
" - abs So | Xo | 5 | hs | Fs 
as 
3 
= 
ol 
Oo 
Length of body . 
Con 
ne 
we 
mu 
coo 
Transverse diameter of head . . . 
o8 
1st segment . 
pa 
B 2k 
o 
Oo 
ae 
ao 
co 
so 
= 
on 
io 
3d segment . 
at 
oats 
38 
7th segment 
27 
6.5 
-20 
5.0 
oe 
pleon at base 
on 
° ont 
‘ af 
oo 
Ro 
ig 
re: 
og 
sds 
a 
ba | 
to 
o) 
bo 
last segment of pleon 
pales 
ig 
58 
ao 
fez) 
os 
58 
Orn 
ao 
o 
Longitudinal diameter of last segment of pleon 
ae 
on 
o° 
wi 
iw 
¢o 
° 
Length, beyond basis, of leg of 3d pair . 
8 
58 
& se “ce “cc 4th pair 
~I 
Oo 
Ss 3 
5th pair 
Ll 
oO 
2 Pe 
& § 
: : 53] 45] 50] 63] . 83 
6th pair. / : 0} 20.0) 16.0) 17.0) 17.0) 15.0 
o 
2 
: 50] . 41] .42|] 54] 60] . 
7th pair . R : 0} 18.0) 18.5) 14.6) 15.0) 12.0 
* In the table of measurements B. is used to denote the Blake Expedition, F. C. the U. 8. Fish 
Commission, and the accompanying numbers refer to the stations at which the specimens were ob- 
tained. The measurements are in millimeters, and over each is placed in small figures the correspond- 
ing decimal part of the length of the body. 
New Haven, September 6, 1883. 
