48 S. GOTO. 



less obliterated, as may be seen in the figures above referred to. In 

 M. reticulata, the endoparenchyma of which consists generally of a 

 typical, reticulated fibrous connective tissue, there are scattered here 

 and there, sometimes in small groups, cells of a roundish or polyhedral 

 outline, with a distinct membrane and a lightly stained, granular 

 protoplasm (PI. Ill, fig. 4, nies. c). Besides these, vacuolated cells 

 whose boundaries can be recognized with difiiculty are also to 

 be observed. In Diclidopliwa sessilis, I have observed in the 

 neighbourhood of the ovary, large vacuolated cells with a centrally 

 situated nucleus, from which granular protoplasmic threads radiated 

 towards the cell- membrane (PL XI, fig. 7) — cells, therefore, which 

 are very similar to those of the mesenchyma of many distomes. In 

 this species there are also polyhedral cells similar to those described in 

 M. tnmcata and M. caudata, between the lateral and the median 

 portion of the body (PI. XI, fig. 5). In M. cUri (PI. Ill, fig. 5), M. 

 elegans (PI. V, fig. 2), M. sciaenae (PI. VI, fig. 2), Calicotijle Mitsukurii 

 (PI. XIX, fig. 8), Monocotyle Ijimae (PI. XVIII, fig. 2), OmJiocotijle 

 spinacis (PL XV, 10 ; PL XVI, fig. 8), and Tristomiim ovale (PL 

 XXIII, fig. 7),:and_in those portions of the body of M. fusiformis and 

 M. caudata which adjoin the genital opening, the endoparenchyma 

 consists of a reticulated, fibrous connective tissue with large meshes 

 filled with granules which are in some species faintly, but in others 

 well stained (PL V, figs. 1, 2, and 3) — the mesenchyma assuming in 

 the latter case more the character of a syncytium. In some species 

 moreover, as in Onchocotyle spinacis, the nuclei are generally surrounded 

 by a scanty mass of granular, well-stained protoplasm. 



In Hexacotyle acuta, the greater part of the endopai'enchyma 

 consists of cells apparently destitute of any membrane, but with well- 

 stained, granular protoplasm, and each with a distinct nucleus which 

 encloses one or a few nucleoli. These cells are usually separated from 



