87 
either dorso- ventral or transverse system; transverse fibers do not divide body into 
cortical and medullary layers; excretory system well developed, consisting of larger 
approximately longitudinal branches, with anastomoses. The larvse possess the 
power of multiplying by transverse fission and of forming supernumerary heads 
which may become independent. Adult unknown. 
Habitat. — Encysted in subcutaneous tissue and elsewhere of man. 
Geographic distribution. — Reported but once, Tokyo, Japan. 
Medical significance. — In the single case reported thousands of 
parasites were present; they gave rise to acme-like swellings, to an 
enlarged condition of the thigh resembling elephantiasis; and to their 
presence in the region of Poupart’s ligament was attributed an ingui- 
nal hernia. 
Fig. 145.— Seven separate pieces of S. proliferum taken from one cyst, x lj. (After Ijima, 1905, fig. 2. ) 
