42 T. KOMAT: STUDIES ON TWO ABERRANT CTENOPHORES 



Around the pharynx, the oesophagus, as well as the infundibulum, one 

 can find some fibres proceeding in the main dorsi-ventralh', besides some 

 circular ones intersecting with them (PI. 3, fig. i). A fairly large 

 assemblage of fibres starts from each sagittal side of the infundibulum 

 (fig. 2, m. f)\ this divides immediately into two secondary groups, which 

 proceed along the perradial canal and farther along the furca of the 

 tentacular canal, each on the ventro-lateral side of the former canal and 

 on the ventral side of the latter. The fibres become less prominent 

 towards the peripheral parts of the body gradually merging into the 

 surrounding tissues. Relatively thick fibres abound in the peripheral 

 parts of the body ventrally to the canal branchlets. They run mostly 

 in the radial direction and show profuse branchings especially in the parts 

 directly internal to the margin of the body. These are without doubt 

 the fibres that play the most important part in the animal's crawling 

 movements. The tentacle-sheath is surrounded by two sets of fibres, one 

 longitudinal and the other circular, intersecting rather irregularly with 

 each other. The individual fibres show no difference whatever in 

 structure from those of ordinary ctenophores; some of the fibres present 

 the characteristic terminal branchings as mentioned above. 



The pigment cells are distributed all through the body parenchyme 

 in the parts directly under the dorsal epidermis. They are all very 

 irregular in form, presenting a somewhat dendritic appearance; they 

 contain a nucleus in the central part of the cell-body (PI. 5, fig. 13). 

 The pigment is deposited in the cell-body in minute spherules, which 

 show differences in coloration according to the general shade of the 

 dorsal surface of the body. Besides, there occur, in all individuals, 

 pigment cells made up of yellowish spherules. Mingled with such 

 ordinary pigment cells and nearly in equal frequency with them, are 

 found pigment cells of a peculiar kind (fig. 12). They are generally 

 more irregular in form than the former, and appear milky by reflected 

 and yellowish by transmitted light. The spherules contained in tlie 

 cell are of rather variable size, though always finer than those of the 

 former kind. The nucleus is placed always in the central parts of the 

 cell. 



There are further peculiar cell-assemblages scattered in the body 

 parenchyme which are made up each of a few cells arranged mostly 

 longitudinally (fig. 14). The plasm stains strongly with eosin; the 

 nucleus is relative!)' very large and provided with a distinct nucleolus. 

 MoKTF.NSF.N ('i2) has described similar cell groups from Tjaljiclla, and 



