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



rento ; QueensclifF; and La P^rouse, Botany Bay, washed on 

 shore. 



7. Cellularia cuspidata^ Busk. 



Cellularia cuspidata, Busk, Cat. Mar. Polyzoa, p. 19, pi. xxvii. figs. 1, 2 ; 

 ' Challenger ' Report, p. 17 ; MacGillivray, Zool. Vict. dec. vi. 

 p. 31, pi. Iviii. fig. 1 ; Haawell, Polyzoa from Queensland, p. 36. 



On the dorsal surface there is often a single " perforation," 

 and in a few cases two ; but at the position of this perfora- 

 tion there is a muscular attachment for the operculum. 



The new branches spring by means of a chitinous tubular 

 connexion from the central cell, and the two side zooecia are 

 continuous, though rather modified in shape, being thin at 

 the line of junction of the internodes, and with the move- 

 ment of the new internode seem readily broken. The articu- 

 lation of C. PeacJiii is by two chitinous tubes to each new 

 branch, one from the central cell and one from each lateral 

 one. 



In C. cuspidata above the outer angle of the modified cell 

 in each new branch a concave disk is formed, and from this a 

 long chitinous radicle-tube is thrown out. In a few cases 

 there is a radicle thrown out above the outer angle of other 

 cells ^ but this is not usual. These tubes have not been 

 mentioned by Busk or MacGillivray. 



Loc. Australian and New-Zealand seas generally ; Shark 

 Island, New South Wales, 8 fathoms. 



8. Menipea crystallina^ Gray. 



Loc. Bass's Straits ; Queenscliff ; Bondi Bay (New South 

 Wales) ; Tasmania ; Straits of Magellan ,* Campbell Island ; 

 New Zealand ; La P^rouse, Botany Bay. 



9. Menipea cervicornisj MacG., var. 

 (PI. IV. fig. 1.) 



Type Menipea cervicomis, MacG, Zool. Vict. dec. vi. p. 34, pi. Iviii. 

 fig. 4. 



The specimens from Shark Island are without lateral 

 avicularia, but have a small median one on the tricellate 

 internodes at a bifurcation. The internodes are much more 

 elongate than in the typical M. cervicomis. 



10. Scrupiocellaria scruptea. Busk. 



A specimen from Shoalhaven beach has zooecia similar in 

 shape to those of the European seas, and the spines, fornix, 



