12 
Ijima reports that the smaller capsules usually contained only a 
single worm; in the larger cysts, however. 2 or more worms or 
pieces were more frequently found: from one capsule o worms were 
obtained, and from another 7 worms. 
Size and shape . — The longest specimen I have observed is 12 mm. 
in length. Some of the worms are simple elongated bodies, either 
more or less flattened, or nearly rotmd in transverse section. The 
larger specimens, however, assume all manner of bizarre and irregu- 
lar shapes which can not be well described. These variations in form 
may be reduced to a progressive but irregular formation of buds, the 
apex of each bud representing a structure similar to the cephalic end 
of the original worm: the form varies, of course, according to the 
number, position, contraction, etc., of the buds, and according to the < 
contraction of the parent stock. Figures 5 to 15 will give an idea of 
the great variety of forms found. 
According to Ijima. many of the worms are smail. Aliform, about 
0.3 mm. in diameter. 3 mm. in length: others attain, even when mod- 
erately contracted. 12 mm. long by 2.5 mm. broad. In some speci- 
mens the body is flattened dorsoventrally. but there is no clew as to 
which is the dorsal and which is the ventral surface. In its simplest 
form the worm is plerocercuslike. or narrow at the head and broader 
caudad when moderately contracted, or irregularly cylindrical when 
strongly contracted. 
This simple plerocercuslike larva, when encysted, may assume a 
rather complicated structure, due to its ability to form buds or super- 
numerary heads, especially on the lateral edges of the flattened body 
in younger specimens, but quite irregularly in the more complicated 
older forms. IlTien the heads detach themselves they represent small 
indej^endent plerocercuslike larvje. and their method of formation 
explains the presence of several worms in one cyst. 
The formation of heads in the manner described naturally tends 
to give the worms a very irregular outline: this irregularity is in- 
creased by the formation of subcuticular bodies, which Ijima inter- 
prets as food material. Ijima assumes that these young heads leave 
the capsule and wander through the connective tissue until they grow 
in size, and then in turn form a capsule of their own. 
Mieroscopic anatomy . — According to Ijima. the cuticule of the 
Japanese form may attain 8fi in thickness: the dermal musculature 
consists of external circular and internal longitudinal fibers. These 
statements are correct as applied to the Florida form also. 
The calcareous corpuscles of the Japanese worm are described by 
Ijima as spherical or ellipsoidal. 7.5 to 12^ in diameter, and abundant 
in all parts of the parenchyma, except in the head, in which they are 
lacking. In the Florida form also the calcareous corpuscles are 
abundant; they vary in size from 8.8 to 17.6/z; in shape they are 
