286 Sottthern Cross. 



XV I. POLYZOA. 



By K. KIHKPATPJCK. 



The Polyzoa obtained from the Antarctic region comprise eight 

 species and one variety, one species being new. The seven known 

 species have all been found before in the Southern hemisphere, 

 either off Australia, Kerguelen Island, or Cape Horn. The specimens 

 encrust seaweed and tubes of SpirorMs antarctica. The list of 

 species is as follows : — 



1. Porella hyadesi, Jullieu. 



2. Inversiula nutrix, JuUien. 



3. Schizoporella liyalina (Linn.), normal form. 



3a. „ „ „ var. discreta, Busk. 



4. „ eatoni, Busk. 



5. Smittia Jandshorovii, Johnston. 



6. Idmonca organizans, d'Orbiguy. 



7. Lichenopora canalic^data, Busk. 



8. Alcyonidium flahelHforme, sj). n. 



PORELLA HYADESI. 



1888. Porella hyadesi, Jullien, ' INIissiou Scientifique Cap Horn.' Zoologie. 

 Tom. VI., ' Bryozoaires,' p. 56, PI. III., fig. 5. 



The two specimens in the present collection differ from the 

 description and figure by Jullien in having a wall-like prolongation 

 on each side of the orifice ; but this feature is much more pronounced 

 in one specimen than in the other ; in official cells the lateral walls 

 fuse with the mucronate avicularian cell and with the oo:'cia to form 

 a square secondary orifice. Tliere is a specimen from Port Phillip 

 in the Busk Collection labelled (wrongly, I think) Porella rostrata 

 (Hincks), which differs from Jullien's type only in having minute 

 rounded mammillae on the surface. 



Locality. — Cape Adare, 8 fathoms, encrusting seaweed. 



Distrihution. — Port Phillip, Victoria ; Tierra del Fuego ; Cape 

 Adare. 



