DUBLIN UNIVERSITY ZOOLOGICAL AND BOTANICAL ASSOCIATION. 145 
spines; pedunculate operculum prolonged upwards into a spine, which, 
with the superior spines, almost completes the circle round the true open¬ 
ing of the cell. Lateral avicularia very large. Yibracula small and 
obscure. Ovicell smooth. 
A delicate transparent species, frequent, in small tufts, on sea-weeds 
and Polyzoa. 
Bass’s Strait; Dr. Harvey. 
4. —Canda ( Lamouroux). 
1.— C. arachnoides {Lamx .). 
Bass’s Strait; abundant; Dr. Harvey. 
Sect. 2.—Continua. 
Suhsect. 1.—Uniserialaria. 
Family 4.—Scrupariadae {Gray). 
1 .— Scrubakia {Ohen). 
1.— S. chelata (Z.) 
Parasitic on Caberea rudis {Busk). 
Bass’s Strait; Dr. Harvey. 
2.—Hippothoa {Lamouroux). 
1 .— II. Patagonica {Bush). 
Bass’s Strait; Dr. Harvey. 
3—ABtea {Lamouroux). 
1. — A. anguina (Z.). 
Bass’s Strait; Fremantle; Yan Diemen’s Land; Dr. Harvey. 
Port Fairy; Mr. Dawson. Hew Zealand; Dr. Joliffe. 
2. — A. ligulata {Bush). 
Bass’s Strait; Dr. Harvey. 
Suhsect. 2.—Bi-Multiserialaria. 
Family 5.—Farciminariadse {Bush). 
1.—Farciminaria {Bush). 
1.— F. aculeata {Bush). 
Yan Diemen’s Land; scarce; Dr. Harvey. 
Family 6_Gemellariadse {Bush). 
1.—Didymia {Bush). 
1 .— D. simplex {Bush). 
Bass’s Strait; a single fragment; Dr. Harvey. 
