344 NOTES ON SOME AUSTRALIAN POLYZOA, 



1880, Yol. V. Part I, p. 42, pi. Ill, figs. 7-8; Lunulites incisa, 

 Hincks, Ann. & Mag. Nat. Hist. 1881, Vol. VIII, 5 series, p. 127, 

 pi. IV. figs. 1-3. 



Zoarium conical, plane or slightly concave beneath ; zooecia in 

 alternating rows, sometimes with an incomplete row of four or five 

 cells near the base ; oral aperture immersed, rounded above and a 

 sinus below which is about ^ the diameter of the mouth ; oper- 

 culum ovate, constricted (?) near the base, with two circular spots 

 on the upper half ; peristome elevated on each side, depressed 

 below the mouth, orifice ovate with a pore on the upper margin ; 

 avicularia forming elevated rows between the zooecial orifices, 

 mandibles triangular with an acute point ; under surface of zoarium 

 when perfect covered by a calcareous lamina, with a number of 

 avicularia some on elevations and others in circular depressions ; 

 on the summit of the zoarium there is usually a cluster of irregular 

 avicularia bearing cells with long acute mandibles. 



Log. — Holborn Island, Port Stephens, and Bass's Straits. 



The question of priority in this species is I think in Mr. Woods's 

 favour. His paper was read in September 1879, and would 

 probably be published early in 1880. Mr. Has well's was read in 

 January 1880, and would probably be issued in April or March, 

 while that of Mr. Hincks did not appear until August 1881. 



The figures of the zocecia given by Mr. Haswell, and those 

 also of Mr. Hincks, are, I think, upside down, judging from the 

 shading and the very narrow sinus shown, but which is really more 

 like the pore above the mouth than the true oral sinus ; the latter 

 is in perfect specimens about \ the diameter of the mouth. The 

 zooecial apertures in Mr. Woods's figure are badly drawn ; still it 

 is the right side up, and shows a correct view of a " semilunar slit 

 with the concavity directed outwards," and an avicularium below 

 pointing downwards. It will also be interesting to note that it is 

 on the elevated ridge which carries the avicularia ; and further it 

 shows the intercalary method of growth, as well as the formation 

 of an incomplete row of zocecia. Altogether this figure gives the 

 general features of what really takes place in the species. 



