ACTINOrODOrs IIOLOTITURTOIDEA. 



1 



dorsal part are taller than the ventral ones. 



Calcareous deposits :— Over the general surface of the body 

 there are to be found tables only {h, c). Disk well -developed, 0.00 

 —0.85 mm. in diameter. Around the four large central holes, one 

 or two more or less incomplete 

 circles of smaller holes with in- 

 dented margin. SjMre well- 

 developed, built of four pillars, 

 but not rarely of five, 0.048 mm. 

 liigh ; nearly all with two trans- 

 \^rse beams, with teeth on 

 each beam. A top view gives 

 8 — 12 or more teeth. There 

 seem to be no noticeable differ- Textfig. si. 



ence in the tables of the dorsal ^f^'^^op's OKstonl: a— C.nJcareons ring; h,n— 



, Tables; cZ—Snpporting rod of dorsal papiUa. 



and ventral surfaces, but if (?>-(? x 300). I-Interm.TmUa; Rl,l_Left dorsal 



anything, there are more tables ^r^L^^^" '"^^^' ^"^^= ^-^-^^^^■ 

 with smaller disk in the ventral than in the dorsal perisome. In 

 the dorsal papilLT, end-plates none or very slightly developed. 

 In the ventral pedicels, end-plates well- developed, with similar 

 supporting rods. No calcareous bodies in the peritoneal membrane 

 or Polian vesicle. Beautiful complex calcareous deposits in the" 

 cloacal wall and respiratory tree. 



Bemarls :— In the specimens from the north, there are many 

 tables with five pillars and others with six, seven, eight, or only 

 three. This is especially noticeable in No. 1372, in which tables 

 with four pillars are not common. Aoki observed a Fierasjer 

 come out from one of the specimens (1333). 



Found so far in 80-100 fathoms or deeper waters of the 

 Sagami Sea. Rather common. Taken in numbers bv '■ Tecruri "- 



