40 



K. ]\rTTSTTTaTT^T : STUDIES ON 



Goims Mesothuria Ludwig 1894. 



10. 3fesof7iurta (lennt\ sp. u. 



(Textfio-. 9). 



Specimens examined 



Description : — Body almost cylindrical. No marginal border. 

 Skin much rumpled and full of creases. Color at present deep 

 brown, probably pui-ple or violet in life-time. Mouth distinctly 

 ventral, anus terminal. 



Ambulacral appendages distributed uniformly over the whole 

 body. Pedicels on lateral ambulacra larger than those in other 

 parts of the body, forming three or four irregular rows. The 

 middle parts of the ventral surface with smaller pedicels, which in 

 some specimens could be easily recognized, but were in one speci- 

 men so minute that I thought for a long time they were here 

 entirely absent. Dorsal surface with small pedicels (1.04x0.32 

 mm.) scattered all over tlie ambulacra as well as the interam- 

 bulacra. 



Genital bundle one on the left. Calcareous ring as in textfig. 

 9 a, Polian vesicle one, 9 mm. long. No tentacular ampullae. 



