244 K. MITSUKUEI : STUDIES ON 



clien Art der Beweis ihrer Zusammengeliorigkeit geliefert woi-den 

 ist, wird man dieselben doch noch als Arten auseinanderhalteu 

 miissen." (Sempee). 



Remarhs : — A compavisou of some specimens of Cununaria 

 frondosa from Eastport, IMaine, with tliis species shows striking 

 similarities between them in many anatomical details as Semper 

 states, but I find in the latter several not unimportant points 

 somewhat different from Sejipek's description. 



■ Unfortunately I can not make out distinctly what the distribu- 

 tion of pedicels and papillfie is in this species. In a specimen 

 13.5 cm. long and 7 cm. broad (PI. VIII., figs. 67—68), I find the 

 three ventral ambulacral zones tolerably well-defined ; the pedicels 

 in the extreme ends of these zones seem to be in two rows, but 

 in the middle region they are in from three to foiu- rows, which 

 condition is probably duo to the contracted state of the 

 specimen, and I should not be surprised if the pedicels are 

 normally, and really two-rowed in each ambulacrum. In the ventrum, 

 moreover, the pedicels are confined to the ambulacra, the interam- 

 bulacra being entirely devoid of them. In the dorsal region, on 

 the contrary, the interambulacra show pedicels. Further, all over 

 the dorsal region, I see large tubercle-like elevations 0.1 cm. or 

 more across, each of which seems to end in a papilla or a pedicel 

 — I can not exactly make out which, though I am inclined to 

 consider it to be a papilla. 



Tentacles are all of a similar size, and extremely bushy in 

 appearance ; they number ten. Sempee states that there is almost 

 no trace of a calcareous ring. Such is not the case in the 

 specimens I have examined. Although not so strongly developed as 

 in some other species, I can easily make out its shape, which is as 

 shown in textfig. 48rt. Eeproductive tubes are extremely numerous, 



