206 Proceedivgs of the Royal Society of Victoria. 



" knobs," most of the cells have no opesiules, but in a few there 

 are indications of a very minute one in the upper angles. It is 

 also near Af. variperforata. Waters, but the zooecia are much 

 shorter in proportion to the length and also more irregular in 

 shape. 



Micropora lunipuncta, n. sp. (PI. XXXIY., Fig. 5). 



Zoarium encrusting. Zooecia elongated, oval ; margins thick, 

 raised ; surface slightly convex with small scattered pores ; a 

 rather large, more or less crescentic opesiule on each side, about 

 one-third of the length of the cell from the distal end of the 

 zooecia. Thyrostome semicircular with raised margins and a 

 small avicularium above. 



Locality. — Aire Coastal Beds (Messrs. Hall and Pritchard). 



This is closely allied to the last species, but the zooecia are 

 much larger, of a different shape and they have large crescentic 

 opesiules ; in the upper angles of some of the zooecia there is also 

 a minute pore. On the right hand side of the figure will be seen 

 a very irregularly shaped zooecium. 



These two species have given me considerable trouble. I, at 

 first, assumed that they were pi-obably varieties of M. elongaia, 

 Hincks sp. as figured by Mr. Waters in A.M.N". H., series 6, vol. 

 vi., pi. i., fig. 22 (not fig. 21), but he unites his M. variperforata, 

 with that species, and considers both are the same as that 

 described by Hincks as Steganoporella elongata. The descriptions 

 and figures do not seem to warrant this. That figured by Mr. 

 Waters (alluded to above) and his M. variperjorala, are most 

 probably the same species, but I do not think either can be 

 Steganoporella elongata, Hincks (A.M.IST.H., series 5, vol. vi., p. 

 380, pi. xvi., fig. 4), as Hinck's figure shows very large opesiules, 

 a depression below, and at some distance from the thyrostome, 

 and the avicularia point upwards, not downwards. Hincks 

 placed it in Steganoporella, but Prof. Harmer states^ that there 

 are never any avicularia in Steganoporella, though they are 

 present in the allied genus Thalatnoporella, to which genus this 

 species (S. elongata) should be referred. 



1 Q.J.M.S., vol. xxxiiii., X.S., p. 236. 



