R. KOMEYAMAI. — SPICULATION. 263 



parenchymal diactins. The unpaired distal ray is usually much 

 more elongated than the paratangentials. 



In exceptional cases, the gastralia seemed to be represented 

 by thetactins or stauractins. 



TJie hexasters are floricomes, graphiocomes and onychasters, 

 thus perfectly agreeing in this respect with R. phœnix O. Schm. 



The floricomes (PI. X, figs. 5-7) are borne in the well-known 

 manner on the distal ray of almost every dermalia. Thej^ are 

 also common in the subdermal region where they take origin. 

 The diameter measures 136-152«. They are therefore consider- 

 ably larger than in R. okinoseana or in the specimen which I 

 identify as R. phœnix. The principal is 13 ," long as measured 

 from the axial center and 3 thick ; it contains an axial canal 

 extending to the very end which is slightly expanded. Five to 

 eight terminals compose a perianth. This measures 13 ,« across 

 the basal swollen part ; above the middle it narrows considerably 

 (often to such an extent that the adjoining terminals almost 

 touch one another), finally to expand to a width of about 50//. 

 Each single terminal (fig. 6) is bosally very thin but as broad 

 as 5// just behind the terminal disc. The latter, as seen from 

 the top (fig. 7), is 11 mm. long and 15,« broad (teeth included). 

 Its outer edge bears 5-S, moderately strong, recurved teeth. 

 The rounded inner edge of the disc is plainly noticeable as such. 



Graphiocomes of the usual appearance are occasionally found, 

 likewise in the subdermal region. Of much more common occur- 

 rence are their detached terminals, the rhaphides, either scattered 

 or still grouped in sheaves and found in various positions io the 

 dermal layer (PI. X, fig. 12). An intact graphiocome measures 



