90 DUBLIN UNIVERSITY 



5. — M. tricellata {Busk). 

 Bass's Strait ; very common ; Dr. Harvey. 



3. — Scrutocellaria ( Van Beneden). 

 a. — Operculatse. 

 1. — S. scrupea (Bush). 



Frequent on Algae and Polyzoa. 



Bass's Strait ; Dr. Harvey. New Zealand ; Dr. Joliffe. 



2. — S. ornithorhyncus, n. 8. 



Cell-mouth rather small, oblique, a tuberculated crescentic plate 

 below the lower lip. Upper margin fringed with four to five long 

 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. Vibracula 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. 

 Subsect. 1. — TJniserialaria. 

 Family 4. — Scrupariadoo (Gray). 



1 . — Sceupaeia ( Oken). 



1. — S. chelata (L.) 



Parasitic on Caberea rudis {Busk). 

 Bass's Strait ; Dr. Harvey. 



2. — Hippothoa (Lamouroux). 

 1. — H. Patagonica (Busk). 

 Bass's Strait ; Dr. Harvey. 



