20 



K. :\[iTsrKi!iu : studies ox 



Tho tal)k'-lik(.! calcareous bodies (textlig. oa — c) arc builfc on 

 the same plan in all parts of the body, although there arc 

 differences in size and elaboration ; O.OU — 0.23 mm. in diameter. 

 They are all on tho same fundamental plan as those of .S. triracUafa, 

 but the ends of the arms and their branches are united with one 

 another by lateral processes, and a disk-shaped base is thus 

 formed. Triradiatc^ ones very few, except at the base of 

 ventral pedicels. Spire of a single pillar, never in the form of 

 columns. Supporting rods scattered among large basal disks of 

 dorsal papillae (d), very k)ng (().(> mm.) ; the two t'uds have 

 many p)erforations. These rods are irregularly scattered, and even 

 toward (he tip of the papilla, although becoming somewhat 



Textfig. 3. 



Si/iuillactcs disco'ul- 

 alis : a- c — Tnblc- 

 lil.o bodies; d — Siip- 

 Iiurling roil uf ilorfal 

 piipillii ; e — Sanic! ot 

 pedicel, 

 (a— r,x210. d. ex 80). 



shorter, they do not become as numerous or simple or twisted as in 

 jS. noiairai or .S'. triradiata. Supporting rods in pedicels (f) are like 



