172 Rev. T. Illncks's Contributions towards a 



Ibid. (p. 31 Sep.). 



Porella rostrata, sp. n. 



In Miss Jelly's ' Catalogue ' Lepralia papillifern^ Mac- 

 Gillivray, is given as a synonym of the above. Neither the 

 description nor the figure in the ' Prodromus of the Zoology 

 of Victoria ' would lead me to identify the two ; but if there 

 is any sufficient ground for regarding them as one and the 

 same species MacGillivray's name should supplant mine, as 

 it was first published in 1868. 



Ibid. (p. 32 Sep.). 

 Mucronella tubulosa, sp. n. 



Waters * ranks this species as a synonym of BJii/nchopora 

 lon(jirostris^ Hincks ; but the species are entirely distinct. 

 The most significant characters of Rhynchopora are wanting 

 in M, tubulosa, 



'Annals; Feb. 1881 (p. 34 sep.). 

 Membranipora bicolor, sp. n. 



In the description of this species it should be added that 

 tliere is commonly a rather prominent nodule on the elon- 

 gate interspace which separates the zooecia in the same line 

 from each other. 



Ibid. (p. 37 Sep.). 



Membranipora patula, sp. n. 

 Additional Locality. Queen Charlotte Islands, very common. 



Ibid. (p. 37 Sep.). 

 Membranipora spinosaj Quoy and Gaimard. 



Jullien has formed a new genus for this species {Cliaperia), 

 with the following diagnosis : — " Deux lames calcaires 

 internes, {\ extremites fixes et servant i\ I'insertion des fibres 

 musculaircs retractrices de I'opercule " f. This genus is made 

 the type of a family group Ciiaperida3. 



It is hardly possible without an extended comparative 

 study of the opercular mechanism to estimate the precise 



* ' Annals,' ser. 6, vol. iv. t). 10, " On Australian Bryozoa." 

 t ' Mission du Cnp-lloru, Bryozoaires,' p. 01, pi. v. li'gs. 3-5, and pi. xv. 

 figs. 4, 5. 



