476 Rev. T. Hincks's Contributions towards a 



characteristic feature of the genus Alicropora ; the depressed 

 lamina, overspread by a membranous covering (at least in 

 the living state), and the suboral foramina or fissures are also 

 characteristic features ; and they seem to be all of them 

 wanting in M. le^iida. In the latter the cell-margin extends 

 to the top of the orifice and closes it in ; the front wall is 

 convex, though only slightly ; there is no trace of an outer 

 membranous wall, while the lateral perforations or pores 

 cannot be placed in the same category with the suboral 

 " opening " or fissure amongst the Micioporidaj. They are 

 evidently of exactly the same character as the punctures, 

 which are so commonly present along the margin of the cell. 

 Commonly there are three on each side in J/, lepida^ of which 

 the uppermost is frequently the largest, but by no means 

 universally. Sometimes those on one side are of much the 

 same size, sometimes the uppermost is smaller than the rest. 

 They are circular or subcircular in form. The Microporidan 

 suboral foramen is usually close under the lower margin of 

 the orifice on each side, and so it is in tlie only specimen of 

 M. 'perforata which I have had the opportunity of examining. 

 On the whole I am inclined to think at present that M. lepida 

 should rank amongst the Microporellid^e ; but without the 

 opportunity of studying a larger range of specimens it would 

 be unwise to come to an absolute decision. 



Ibid. (p. 60 Sep.). 



Porina [Eschara] gracilis^ Lanix. 



Lamouroux's specific name has been set aside by Waters 

 in favour of coronata, Eeuss (Wien, Tert. 62). There seems 

 to be no sufficient ground for the change, which in itself is 

 undesirable. Lamouroux's diagnosis may be imperfect, but 

 Lamarck, Milne-Edwards, Busk (B. M. Cat. and Chall. Rep.), 

 MacGillivray (Vict. Pol.), and others have identified his 

 species and adopted his name. A designation so generally 

 adopted, and by such eminent authorities, should not be 

 lightly displaced. Waters himself has suggested * that 

 Milne-Edwards, who has given a fuller description than 

 Lamouroux, should be joined with him, as authority for the 

 name. ISuch a course (if needful) would certainly be prefer- 

 able to its suppression. 



Ibid. (p. 60 Sep.). 



ScMzoporella trianyuhi^ sp. n. 

 Busk, in his description of this species (' Challenger ' 

 * " Australian Bnozoa," ' Annals' for September 1887, p. 189, 



