244 K. MiïsuKUEi : studies on 



chen Art der Beweis ihrer Zusammengehörigkeit geliefert worden 

 ist, wird man dieselben doch noch als Arten auseinanderhalten 

 müssen." (Sempee). 



Remarks : — A comparison of some specimens of Cuciimaria 

 frondosa from Eastport, Maine, with this species shows striking 

 similarities between them in many anatomical details as Sempek 

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

 somewhat different from Sempee' s description. 



Unfortunately I can not make out distinctly what the distribu- 

 tion of pedicels and papillœ 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 four rows, which 

 condition is probably due 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. 48a. Eeproductive tubes are extremely numerous, 



