EAMILIES AND GETTERA OP THE MADREPOEARIA. 



133 



The Lophoserid?e become a very important family, and there are 

 35 genera and 2 subgenera. Out of the 19 genera of Milne- 

 Edwards and Haime, 3 are passed on to the Plesioporitidse, so 

 that there are 19 new genera added. 



The Anabaciadse remain as they were, 2 genera. 



The Plesioporitidse have 13 genera ; 1 was formerly an As- 

 trseid, 3 were Lophoseridse of Ed. & H. ; 9 genera are thus 

 added. 



The section Fungida contains therefore 73 genera and several 

 subgenera. 



Besides these 73 genera, 23 have been recorded, and either 

 abolished in revision, or in some instances made subgenera. 



Transitional Family. 

 I. Family PLESIOFUNGID^ * . 



This family unites more or less the Aporosa and Fungida. 

 Fungida simple or colonial, with synapticula in the interseptal 

 loculi, besides endothecal dissepiments. Septa solid and imper- 

 forate, occasionally irregularly perforate and trabeculate. 



This Family contains five groups. One genus can hardly be 

 satisfactorily placed, because nothing is known regarding the 

 nature of the septa ; but, provisionally, I place it in a group by 

 itself. This is Epistreptophyllum, Milaschewitsch. 



E. Pratz unites Siderastrwa, AstrcEomorpha, and Mesomorpha 

 ,i in a group ; but I cannot agree to the union of the last two with 

 the first-named. Hence Siderastrcea stands as a genus alone. 

 The Thamnastroid group is fairly well defined. 



Group-Genus Epistreptophyllum. 

 A simple Plesiofungid. 



Oenus EpiSTREPTOPHTLLrM, Milaschewitsch, ^''Korallen der Natt- 

 heimerschichten,'^ ii. Abtheil., Falcdonfographica, xxi. p. 210 

 (1875). 



Corallum simple, adherent, conical or cylindrical. Calice 

 sunken. Columella well developed and spongy. Septa numerous, 

 not exsert. "Wall ornamented with subequal costse. Deeply in 

 the interseptal loculi are endothecal dissepiments, and, besides, 



* See Verrill, ' Notes on Radiata,' p. 640, E. Pratz, ' Palaeontographica,' 

 1882, and Zittel, Palaeontology, foreshadowing this group. 



