62 ART. S. — I. IKEDA : THREE NEAV AND 



view of irregularly lobed cells composing the wall of a very 

 large corpuscular body, h, an entire small corpuscular body con- 

 sisting of only four cells yet without lobe-like processes. 410 x . 

 Fig. 22. — Optical longitudinal section of a " Töpche^i." Zeiss, oc. 2 and 

 hom. imm. J^. 



Plate III. 



(All figures in this plate refer to Thalassema tœnioides.) 



Fig. 23. — Internal anatomy of a female specimen. The body- wall was 

 cut open along the mid-dorsal line to expose the viscera into view. 

 Eeduced to ^^^ natural size. 



Fig. 24. — Some segmental organs greatly magnified. Each organ consists 

 of a basal tubular portion, a swollen portion containing numerous 

 eggs and of the ciliated funnel. 



Fig. 25. — Magnified view of ciliated funnel-tubes on the surface of anal 

 gland. Some tubes stand single, while some others are branched, 

 tiach branch ending with a funnel. 



Fig. 2b". — Part of the body-wall from a transverse section, passing through 

 nearly the middle of a small papilla. 180 x . 



Fig. 27. — Part of a section through a small papilla under higher magnification 

 than in fig. 2G, to illustrate the finer structure of the peripheral 

 parts. Zeiss, oc. 4 and hom. imm. ^^. 



Fig. 28 — Part of a section through a large papilla. In the cutis-Iayer are 

 imbedded numerous large unicellular glands (g. <jl.), distinctly 

 opening each for each through the epidermis on the cuticular sur- 

 face. Zeiss, oc. 2 and hom. imm. ^L. 



Fig. 29. — Median part of a transverse section through the ventral body-wall. 

 Some segmental organs are seen in section on both sides of the 

 ventral nerve-cord. Zeiss, oc. 2 and obj. ag. 



Fig. 30. — Part of a longitudinal section of the wall of a segmental organ 

 near its external opening. Owing to abundance of large uni- 

 cellular glands, the epithelial wall in this region is conspicuously 

 thickened, as shown also in the preceding figure (ex'.o.). Zeiss, 

 oc. 2 and obj. hom. imm. jW. 



Fig. 31. — Part of a longitudinal section of the wall of the tubular portion 

 of a segmental organ. Between the two epithelial layers (the 



