Classification of the Spongida. 193 



Group 11. Platyfibra. 



Sarcotragus fcetidus, Sdt. op. cit, p. 3G. (A type specimen is in the 

 British Museum.) 

 For other species see Part III. 



Group 12. Peraxiata. 

 For species see Part III. 



Group 13. Incrustata. 

 For species see Part III. 



Group 14. Otahitica. 



Spongia othahetica, Solander and Ellis, 178G, 4to, pi. lix. figs. 1 & 2. 



(The original specimen is in the British Museum.) 

 Halispongia ventricidoides, Bk. Proc. Zool. Soc. 1874, pi. xlvii. 



(The Ventriculites were Hexactinellids, and had the structure of 



Myliusia Grai/i, Bk., according to Mr. W. J. Sollas, Quart. Journ. 



Geol. Soc. Feb. 1873, p. 65, fig. 2, and Schmidt, 1870, Spongienf. 



atlant. Gebiet. Taf. ii. fig. 10.) 

 It. Mantelli, Bk. Proc. Zool. Soc. 1874, pi. xlvii. 

 Sponqionella HoldsiuoHhii, Bk. ib. 1873, pi. v., = Spongia papyracea, Esper, 



1797, Taf. 65. 

 For other species, which are very numerous and varied, see Part III. 



Group 15. Sarcocornea. 

 fCacospongia cavernosa, Sdt. Sp. adriat. Meeres, p. 28. (A type specimen 

 is in the British Museum.) 



Group 10. Arenosa. 

 Dysidea fraqilis, Johnston, op. cit. p. 187,= Spongelia, Sdt. Spongienf. 



atlant. Gebiet. 1870, p. 77. 

 •Sptmtielia incrustans, Sdt. 1802, Spong. adriat. Meeres, p. 29, Taf. iii. 



fig. 7. 



Family 3. Pseudohircinida. 



Group. 17. PSEUDOARENOSA. 



For species see Part III. 



Group 18. Chalinohircinina. 

 For species see Part III. 



Group 19. Armatohircinina. " 

 For species see Part III. 



Order IV. RHAPIIIPONEMATA. 



Family 1. Chalinida. 

 Group 1. Digitata. 



Halichondria oculata, Johnst. op. cit. p. 94, pi. iii.,= Chalina oculata, Bk. 

 Mon. Brit. Spong. cit., = Spongia poly chotoma, Esper, 1794, Taf. xxxvi. 



