8 S. VOSHIWARA. 



curved, with the concavity facing the peristome. 



Pedicel lariae of two kinds : small slender-stemmed trifid ones and 

 larger but short-stemmed cup-bearing ones. Both distributed all over 

 coronal, periproctal, and peristomal plates. 



Sphaeridia large, 1 mm. in length, arranged in a single series 

 closely inside the innermost series of tentacles, not only on actinal side 

 but also on abactinal side up to one-fourth of the way from ambitus to 

 periproct. Their membranous covering contains red pigment ; the club- 

 shaped calcareous body has numerous canals longitudinally traversing 

 the neck. These open mostly on the surface of neck, while only three 

 of them pass into the head to open there. 



Branchia with branches that are either simple and finger-shaped 

 or lobose at end. Stome pentagonal. Jaws unclosed above with 

 epiphyses. Tooth keeled. 



Amongst other points of structural differences, the present species 

 may be readily distinguished from all other species of the genus by the 

 presence of very long spines on the abactinal, and of hoof-capped spines 

 on the actinal side. 



Asthcuosoma Ijimaï, no v. sp. 

 (Figs. 8-12.) 



The following description of this species is based on a single 

 specimen which was purchased by Prof. I.jima from a Jögashima 

 fisherman in a fresh state. It was stated that it came up sticking to 

 the fishing net. The locality of its capture must have been not very far 

 away from Misaki, but the exact depth is unknown, although we can 

 safely assert that the particular kind of net used by that fisherman is 

 never let down to a depth beyond 55 fathoms. 



Test similar in shape and nature to that of A. longispiimm, Yosh., 

 but proportionally higher. Diameter 132 mm., height 40 mm. ; color 

 as preserved in alcohol light yellow with dark brownish spots and 

 irregular markings. 



Plates very numerous. In a vertical row of interambulacral plates 



