240 ART. 7. — I. IJIMA : HEXACTINELLIDA, IV. 



diameters of 212 mm. and 148 mm. The strongly compressed 

 base measures only 37 ram. in thickness from side to side. 

 Thickness of wall at the middle of the body, 9.5 mm ; farther 

 l)elow, up to 12 mm. Basal end attached to the substratum at 

 two places, between which is a free dermal surface still preserving 

 a number of pentactinic prostalia. 



C, a specimen (S. C. No. 460) slightly bent at the base 

 and with the oscular margin expanded outwards all around and 

 bent backwards. Height, 570 mm. Body laterally compressed 

 Init only to a slight degree. Pentactinic prostalia preserved in 

 many part of the dermal surface. 



D and D' , two views of a specimen with l)ent bod_v (S. C 

 No. 2()7). Height, 348 mm. The oval osculum, 170 mm. by 73 

 mm.; elongate in the sagittal direction ; with flaring oscular rim. 

 In the middle of the body the breadths are 100 mm. sagittally 

 and 77 mm. transversely. The base is nearly round in cross- 

 section, measuring about 40 mm. across. A low couical outbulging 

 is seen at about the boundary between the lower and the middle 

 third of the body on the side of the greater curvature but to one 

 side of the median line. This is undoubtedly the beginning of 

 the formation of a daughter person ; l)ut a secondary osculum has 

 not yet opened itself at the summit. Thickness of wall at about 

 the middle of the body, 10 mm. 



E, a slightly bent specimen (S. C. No. 416) attached by 

 tubercle-like basal processes to a branched coral. Below and on 

 one side is a funnel-like daughter person. Height, 285 mm. 

 Near the ujiper end the walls of the two sides have come into 

 contact and have fused together. Above this place of fusion, the 

 gastral space and the original main osculum are narrow and slit- 

 like ; below it is the main part of the gastral cavity which 



