254 Mr. A. W. Waters on Australian Bryozoa. 



Lichenoporidge and some other families will never be brought 

 into order until the ovicells have been studied in most species, 

 whereas it is astonishing how seldom they have been recorded. 

 This I attribute largely to insufficient search, although often 

 large numbers of specimens may be examined without any 

 ovicells being found ; audit is therefore very satisfactory that 

 the present collection enables me to add descriptions of several 

 instances of interesting ovicells. I have also recorded the 

 very interesting discovery of short spines, with knobs, on the 

 outside of the zoarium and ovicells of L'clienopora grignonen- 

 sis, similar to the rays in the inside of the zooecia. This 

 seems to add to the difficulty of understanding these spines ; 

 and we may ask whether the long hair-like spines on L. 

 ciliato, L. echinata, and L. pristis are homologous. 



I have referred specially to the family Lichenoporidse, 

 believing that there is no other which is so likely to throw 

 light on the natural classification and relationship of a large 

 part of the Cyclostomata as this, and the similarity of struc- 

 ture with HeteroiJora &c. makes it possible it may ultimately 

 clear up several obscure palseontological questions *. The 

 size of the lamina upon which it grows does not seem to have 

 any specific value, and the figures now given show how 

 largely the shape of the peristome varies in the same speci- 

 men. Other characters have not been sufficiently studied 

 for us to know how far they are variable. 



75. Crista ehurnea (L.). 



For synonyms see Hincks, Brit. Mar. Pol. p. 420, pi. Ivi. figs. 5, 6 ; 

 Pergens, Plioc. Bry. v. Rhodos, p. 3 ; and Woods, Trans. Roy. Soc. 

 Vict. 1865, vi. p. 5, pi. i. fig. 12. 



A small fragment from Shark Island, Port Jackson, 8 

 fath., certainly seems to be this species j but a determination 

 where there are no ovicells is never very satisfactory. 



76. Crisia Edwardsiana^ d'Orb. 



Crista Edwardsiana, d'Orb. Voyage dans I'Am^r. Merid. p. 7, pi. i. 

 figs. 4-8 ; (?) Busk, Cat. Mar. Pol. pt. iii. p. 5, pi. ii. figs. 5-8 ; 

 MacGillivray, Zool. Vict. dec. iv, p. 37, pi. xxxix. fig. 1. 



The fragment from La Perouse is small, but there is no 

 doubt that it is this species. The joints of the internodes 

 and of the spines are black. This piece has no ovicells j but 



* 1 shall be much obliged to Australian or other authors who can let 

 me have authentic specimens of described species in various stages of 

 development. 



