ACTINOPODOUS HOLOTHUIUOIDEA. 



24:1 



bushy ana uubranchcd. Tliey spring froni a point nearly half- 

 way back in the body length. As in Cucnmaria frondosa, there 

 is one extremely long Polian vesicle, which in one specimen I 

 have fomad to be I4cnr. long, being longer than the body itself. 

 The madreporic body is rather large and globnlar. Lampekx 

 states that in the specimens from Georgia, he saw an enormous 

 number of small, 1 mm. long vesicles attached to the rmg-canal. 

 I do not find such vesicles in my specimens. 



One of the characteristic points of this species, as brought 



out by Sempek, is that there are large, radially placed calcareous 



plates near the cloacal opening. Ceakk says these plates are not 



at all noticeable in the Alaskan specimens. Neither can 1 find 



them in my specimens. Calcareous bodies 



found in the skin are very much like 



those depicted by Semper in his Fig. 18, 



Taf. XXXIX. They arc irregular latticed 



plates with serrakxl margin and more or 



less beset with knobs {b). Their si/.e varies 



from 0.192 to 0.280 mm. They show a 



tendency to be less broad at one end than 



at the other. In large specimens, they 



are apt to be very sparsely scattered, so 



that they may often be overlooke<l. What 



Theel says in regard to the ca.lcareous 



plates of C. frondosa seems to be largely 



true in this species also; in fact the 



irregularly formed plates with uneven or 



spinous margin are as a rule rare in the 



old specimens, and are usually found only 



il 





Texlfig. 48. 



Ciicumana japonica : n— CiJ- 



(^areoiw ring; i— Perforated i.liite of 



l«>ri.s.>me. X 240. I -Interrmliftlin ; 



in the pedicels or in their neighborhood. u-Ua.iiai. 



