18 Proceedings of the Royal Society of Victoria. 



Busk described a species undei' the same name in the report of 

 the "Challenger" Polyzoa (p. 152, pi. xviii., fig. 7), which is 

 quite different ; consequently a new name is required for S. 

 transversa, McG., and I have much pleasure in giving it the 

 name of S. macgillivrayi, in honor of Dr. MacGilHvray and in' 

 recognition of his excellent work in both recent and fossil 

 Polyzoa. 



Micpopopella mapginata, n. sp. (PL I., Fig. 2). 



Zoarium cylindrical. Zooecia oblong, with raised margins, 

 perforated with a marginal row of small pores and also scattered 

 pores on the surface. Thyrostome arched above, nearly straight 

 proximally, with a crescentic pore below it. 



Locality.— ^^v'mg Creek (T. S. Hall). 



A single specimen. The raised margins are uncommon in this 

 genus. 



Smittia centralis, var. laevigata. Waters. (PI. I., Fig. 3). 



Mr. Waters, in Q.J.G.S., vol. xxxvii., p. 337, describes S. 

 centralis, and on the same page describes a variety, "laevigata," 

 which differs from the type species in having only a few 

 elongated pores near the edge instead of a double row, and 

 he gives a figure of it (pi. xiv., figs. 7 and 8) but none of the 

 type species. 



I have found specimens of var. laevigata in the Mitchell River 

 deposits (I have not seen the type species) which bear ooecia and 

 which have the peristomes perfect. The peristome in the type is 

 said to be " very much raised and projecting with a large pore 

 (probably avicularian) immediately below the orifice ; peristome 

 transversely oval ;" that of var. laevigata is said to be " less well 

 preserved." The specimens found by me are undoubtedly those 

 of var. laevigata; the peristome is perfect, it is much raised and 

 projecting, but the lower lip is nearly straight, with a very 

 narrow spout or sinus, and there is no pore immediately below 

 the orifice. In some cases the spout or sinus is closed at the 

 top, and this would lead to the supposition that the " pore " 

 spoken of by Mr. Waters was really a closed sinus. The ooecia 



