458 



Records of the Indian Museum. [Vol. XVI, 1919.] 



the diameter of the upper rotule. The gemmules are small, sub- 

 spherical but somewhat produced round the single foraminal 

 aperture. 



Measurements : — 



Diameter of gemmule 

 Length of skeleton spicule 

 Diameter of skeleton spicule 

 Length of gemmule-spicule 

 Diameter of lower rotule 



o*26xo*28 mm. 

 0-22 -0-31 



0'0I-0"0I2 ,, 

 0'0I2 - 0*015 ,, 

 0*012 -0'0I5 ,, 



dry. 



Type- specimen. — No. P \^- Zool. Survey of India {Ind. Mus.) 



The race differs from the forma typica mainly in the longer 

 shaft of the gemmule-spicules and the greater concavity of their 

 upper rotules. 



