368 ME. A. DBNDT ON WEST-INDIAN CHALININE SPONttES. 



I'ig. 6. Spinosella sororia, var. dilatata. Portion of dermal skeleton as seen in surface 



section; x25. 

 Fig. 7. Spinosella sororia. Portion of vertical section showing the arrangement of 



the main skeleton ; X 25. 



PLATE IJX. 

 Fig. 1. Spinosella sororia, xj. 

 Fig. 2. Spinosella velata, X ^■ 

 Fig. 3. Spinosella sororia, var. fruticosa, X 5. 



PLATE LX. 



Fig. L Spinosella plicif era, xf. 

 Fig. 2. PachychaUna variabilis, X f. 



PLATE LXI. 



Spinosella maxima, xf. 



PLATE LXIL 



Fig. 1. Siphonochalina procumbens, x^. 

 Fig. 2. Siphonochalina ceratosa, xi- 

 Fig. 3. Siphonochalina spiculosa, xh. 



PLATE LXIIL 

 Fig. 1. Spinosella sororia, var. elongata, X5. 

 Fig. 2. Spinosella sororia, var. dilata, X ^. 



