HEMIMYARIA — ASCIDIiE SIMPLICES. 
Tun. 5 
Fam. Octacnemidje, n. fam. 
This new family is formed by IIerdman, (4) p. 87, for the reception 
of Octacnemm bythius , Moseley. A second specimen of this remarkable 
form is described and figured ; Herdman, (4) p. 93. 
ASGIDIAGEA. 
Definition and subdivisions ; Herdman, (4) p. 11. 
ASCIDL® SALPIFORMES. 
A definition and a general account of the history and structure of the 
group is given in the ‘ Challenger ’ Report. 
Fam. Pyrosomatidas. 
Pyrosoma spinosum , n. sp., Herdman, (4) p. 29. 
Several undetermined and young specimens of Pyrosoma are also 
described, p. 31. 
ASCIDIJE COMPOSITE. 
Fam. Polyclinid,®. 
FrayaroidfiSy n. subgon., Maurice, (9) p. 225. 
Fracjaroidcs aurantiacum , n. sp., id. t. c. p. 225. 
ASCIDI2E SIMPLICES. 
Fam. AscidiiDjE. 
Abyssascidia vasculosa, n. sp., Herdman, (4) p. 151. 
Ascidia sp. (?), n. sp., id. t. c. p. 155. 
Fam. Cynthiidj:. 
i Sty da sericata , n. sp., Herdman, (4) p. 153. 
