24 



K. :\riTSTTKri^i : stt'dies ox 



pondages somewhat contracted, lint it can be made out that the 

 dorsal payjillae are in six rows, as described for »S*. trirarliala. 

 Each dorsal ]iapilla has also a large conical mamma-like base as in 

 that species. Ventral pedicels in three zones ; the two lateral zones 

 belong to the lateral ambulacra, each showing a, double alternate 

 row of pedicels. The middle zone has much fewer pedicels than 

 in aS. triradlata, but not so few as in .S. cnici/cni. On the whole, 

 the lateral pedicels seem to be larger and more prominent than 

 tlie midventral pedicels. 



Textfig. 3. 



SijmiUacleJ! nozmcai : 

 a, h — Crupiforra licxlies of 

 Yontrmn ; c— Sninc o£ 

 ilorsal pipilla ; d. e — 

 Sill") port i II j:; roils of ilorsal 

 IwiJilla. {ii—c xlCO; </, 

 e x80). 



Oenital bundles two. Stone-canal one, attached to the dorsal 

 mesentery ; it runs in fi'ont of, and parallel with, the genital duct, 

 and is finally lost in the skin. Polian vesicle one, long and 

 slender, 21 mm. long. Posterior notch of the radial pieces in 

 the calcareous I'ing very deep. Other parts eviscerated. 



Cruciform calcareous bodies or table-like bodies are largest 

 in the basal conical part of dorsal papillae (textfig. 5 c). 

 They are of about the same size in the remaining parts of the 

 dorsal perisome and in the ventral perisome, ^fany are united 



