SPONGES — WHITELEGGE. 491 



Part II. 

 MONAXONIDA continued. 



The present part (Part II.) embraces the remaining portion 

 of the Monaxonida It includes thirty species, twenty-three 

 of which are introduced as new. Species previously described 

 consist of some obtained by the " Challenger " Expedition and a 

 few described by Dr. R. v. Lendenfeld. The new species have 

 been described as fully as the material would allow and all 

 except four have been figured. The species already described 

 have been carefully examined and additional details added, which 

 may be of service from a classificatoi'y point of view. 



The new species described are : — 



Stylosticho7i coimlosum. 

 Microciona clatlirata. 

 Glatliria striata. 

 „ inultipora. 

 ,, cJiartacea. 



,, favosa. 

 ,, calopora. 



,, arciiophora. 



Rhapliidophlus tenebratus. 

 ,, hispinosus. 



Echinochalina reticulata. 

 Allaiitophora plicata, gen. et. sp. nov. 

 Spongosorites variabilis. 

 PhaJcellia multiformis. 

 Axinella symbioctica. 

 „ frondula. 

 ,, vermiciilata. 

 Sigginsia scabra. 

 Itaspailia, dicliotoma. 

 „ ecTiinata. 



„ sp. 



Sigmaxinella den droides. 

 „ ?nammillata. 



