252 I. IJIMA : HEXACTINELLIDA. I. 



REGADRELLA KOMEYAMAI nov. sp. 



PI. IX and PI. X, figs. 5-17. 



During 1898, Mr. Komeyama of Tokyo presented to the 

 Science College Museum a very beautiful and remarkably well 

 preserved specimen of what proved to be a new species of Rega- 

 drella. I have named it in honor of the donor. The specimen 

 was found by him at a collector's in Yokohama amongst other 

 things that came from the Sagami Sea. I have no hesitation 

 in assigning the locality of the specimen to that sea, though 

 nothing whatever is known about the circumstances of its capture. 



The specimen (Mus. No. 486 ; PI. IX, fig. 1), which is in 

 desiccated state, consists of two, — a large and a small individual, 

 both thin-walled and lamp-chimney-like in shape. They stand 

 close together being attached by means of large, irregularly lobed, 

 basal expansions to a mass of soft, fine-grained tufa. More 

 correctly, they have evidently not grown directly on the tufa, but 

 on the basal mass of an individual of the same species long 

 dead and destroyed. 



General Characteks. 



The larger individual, which is the better preserved of the 

 two, will here be first described in detail. It measures 225 mm. 

 in total length. . At the lower end the body is bent as if it had 

 been directed upwards while growing with its base attached to a 

 perpendicular surface. At the juncture with the knobby base, it 

 measures not more than 30 mm. across. From that point superiorly 



