624 
CxILBERT E. JOHNSON. 
Table I. — Measurements. 
Adult female. 
Adult male. 
Typical form. 
Peptone form. 
Typical form. 
Peptone form. 
Length 
‘2000 /i 
1238 /r 
17 81 
900 u 
CEsophagus . 
226 = 
248 = 4- 
209 =l 
Tail . 
Vulva . 
1019 
143 = 1 
638 
Diameter 
1^3 =~ 
86 
104 = 4 
50 
Buccal cavity 
Spicules 
2 , 
23 =4 
67 
49 
Eg 
Larva in Nephriilium. 
Typical form. 
Peptone form. 
Length 
510 fi 
56 /r 
62 
Diameter 
28 
1 
~ 18 
3- =T^5 
1-3 
drical. It is of equal width tlii oughout, except at its posterior 
end, just in front of the point wliere it is continued into the 
oesophagus. There it narrows and then widens again, ending 
in a thickened edge. The oesophagus has two hulb-like 
swellings, an anterior elongated one and a posterior rounded 
one, the latter bearing a dental armature. A part of the 
anterior end of the oesophagus is reflexed forwards round the 
posterior three fourths of the buccai cavity. The intestine 
(PI. 37, fig. 2) is a tube formed between two lows of large 
alternating cells containing' large nuclei. Its dark appear- 
ance by ti-ansmitted light is due to the granules deposited in 
its walls. The lumen of the intestine, and also of the whole 
of the alimentary canal, is lined with chitin. The rectum 
