xn 



CONTENTS. 



Leucogypsia 



Grossei 



PAGB 



42 



42 



Order 2. Silicea 



45 



Geodia 



Zetlandica . 

 Pachymatisina 



Johnstonia 

 Ecionemia 



couipressa 

 ponderosa 

 Polymastia 



omata 

 bulbosa 

 robusta 

 brevis 

 spinula 

 radiosa 

 mammillaris 

 Halyphysema 



Tumanowiczii 

 ramulosa 

 Ciocalypta 



penicillus 

 Tethea 



cranium 

 Collinsii 

 Scbmidtii 

 lyncurium 

 spinularia 

 Halicnemia 



patera 

 Dictyoeylindrus 



45 

 45 

 51 

 51 

 55 

 55 

 56 

 58 

 58 

 61 

 62 

 64 

 66 

 68 

 71 

 76 

 76 

 79 

 81 

 81 

 83 

 83 

 87 

 89 

 92 

 94 

 96 

 96 

 lOCi 



