ö4 ART. 4. T. TKEDA : 



from Naha and Koniya are much smaller, while the body-wall, 

 which is rough on the surface, is thicker and more deeply brown 

 in color, without however showing any recognizable difference in 

 internal anatomy. But as compared with foreign specimens, all the 

 Japanese forms seem to show some points of structural deviation 

 as will be gleaned from the following account. 



The longitudinal muscles are divided into 18-21 (mostly 20) 

 separate bundles which very rarely anastomose with one another ; 

 the circular muscles are also separated into more or less regular 

 bundles. Of the four retractor muscles, the dorsal pair arise from 

 the 7th-9th longitudinal muscles ; the veiitral pair from the lst-4th 

 (mostly the lst-2nd). The roots of all these muscles are situated 

 nearly at the same level. The two lateral branches of the spindle- 

 muscle are attached to the 9th or the 10th longitudinal muscle, 

 close to the root of the dorsal retractor muscle; the main bundle does 

 not end posteriorly in a single root but divides into 3-5 branches 

 which give off still finer ones in order to join the body-wall. 



The * Ovale Gebilde ' which was first descril)ed by Keferstetn 

 from German specimens, is present also in all the Japanese speci- 

 mens I have dissected. As was already noticed by other authors, 

 these structures are seen as small oblong bodies closely aflhering to 

 the inner surface of the body- wall. Their longer diameter measures 

 0.5 miîi. on an average. Sometimes they are found lying on the 

 longitudinal muscles and sometimes between them. They are most 

 abundant in the anal region. When seen in the fresh state, 

 they appear as colorless transparent spots. A study of the bodies 

 on sections has revealed the fact that they are of quite a different 

 structure from those which were described by Keferstein. Ac- 

 cording to that author, the bodies should present an appearance 

 of skin papillae and should inclose a peculiar kind of hook, 0.08- 



