92 Rev. T. Hincks's Contributions towards a 



Avitli Lamouroux's Flustra viamillaris. Certainly neither his 

 diai^nosis nor Iiis enlarged figure gives any adequate idea of 

 the form in question. There is a certain general resemblance 

 in the shape and arrangement of the cells, but that is all. 

 The figure of the natural size indeed does closely resemble my 

 specimens, and the " marine plant " on which it is represented 

 as growing is, I believe, the same in both cases. The colour, 

 too, may probably be the same in the two forms ; but no 

 means of sure identification are supplied. Under all the 

 circumstances of tlie case, however, it may be better to assume, 

 on the strength of such minor resemblances as there are, that 

 Laniouroux had the present species before him, and so, to avoid 

 a change of name, the species will stand as Thairopora 

 mamillaris, Lamx.* (sp.). 



In my notes on this species I have drawn attention to the 

 importance of the opercular characters, and raised the question 

 as to their generic significance. MacGillivray has since insti- 

 tuted the genus Thairopora for this and kindred forms. I 

 quite agree with him that this genus finds its proper place 

 amongst the Microporida3. 



Ibid. (p. 21 Sep.). 



Membra n ipora tra n s versa. 



As already explained in the number of the ' Annals ' for 

 Feb. 1881, Hutton was before me in describing this inter- 

 esting form, and his specific name {cincta) takes the place of 

 the above. MacGillivray has founded the genus Diploporella 

 for its reception t, and places it in the family MicroporidjB ; 

 but there may be a question, I think, as to its true syste- 

 matic position, 



'Annals,' November 1880 (p. 25 sep.). 



Membranipora peduncuJataj Manzoni. 



Waters refers this form to the Membranipora confiuens, 

 Itcuss, and it would be ]n-cmature to say that he is wrong. 

 But I may point out that the Ceylon species agrees much 

 more exactly with Manzt)ni's description and figure tlian 

 with those wliicii he supplies J. The cells, as Manzoni 



• For eyuon^Tns see Miss Jelly's 'Cafaloj^ue.' 

 t Trans. Koy. Soc. ^'ictorin, Ajml 18S0. 



\ "Fossil Clu'ilostomatcius liryozoa from Mount Gambler, S. Austra- 

 lia/" (Juart. Journ. (.icol. Sue. Au-riist 1882, p. '_H)2. 



