General History of the Marine Polyzoa. 169 



tically from the same locality, and since, as I have pointed 

 out, the peculiarities in the description of Syntethys can be 

 easily accounted for on the supposition that Forbes and Good- 

 sir's specimens were, like the iJuke of Argyll's, the Diazona 

 violacea of Savigny. 



XX. — Contributions towards a General History of the Marine 

 Polyzoa^ 1880-91. — Appendix. By the llev. TiiOMAS 

 HiNCKS, B.A., F.R.S. 



[Continued from p. 93.] 



' Annals,' November 1880 (p. 28 sep.) 



Steganoporella Rozieri^ Audouin. 



I have taken this species as the tjpe of a new genus, Tha- 

 lamoporella^ distinguished from Steganoporella by important 

 diiferences in the internal structure of the zooeciura *. 



Ibid. (p. 29 Sep.). 

 Steganoporella elongata, sp. n. 



This species must be referred to the genus Micropora. 

 The structure of the Steganoporellida3 had not been thoroughly 

 investigated when my description of it was published ; later 

 researches have shown that it is not a member of this family, 

 but finds its proper place in the kindred tribe of the Micro- 

 poridas. 



Ibid. (p. 30 Sep.). 

 Bteganoporella Jervoisii^ sp. n. 



This form belongs to the genus Thalamoporella. The list 

 of the recent species of Steganoporella which I have given 

 (p. 30) is from the cause just mentioned defective. The 

 first of the species which it contains, Eschara impressa, 

 Moll, must be removed from it. Of the rest, Flustra Rozieri^ 

 Audouin, Memhranipora golhica^ Busk { = S. Rozieri^ form 

 gothica^ mihi), and Steganoporella Smittiij Hincks, belong to 

 the genus Thalamoporella ; Memhranipora magnilahrisj 

 Busk, is the only representative of the genus Steganoporella 

 as now defined. 



* "Critical Notes on the Polyzoa," 'Annals' for Feb. 1887, pp. 163, 

 164. 



