Folyzoa of the Adriatic. 303 



the present species had he not described the oral sinus as 

 being frequently occupied by a small avicularium *. No 

 such structure has been noticed in the case of 8. Cecilii; but 

 the resemblance between his form and the latter is in other 

 respects so striking that it would be difficult to regard them 

 as specifically distinct. 



Range. Britain (south-west coast and Channel Islands) ; 

 Mediterranean ; Australia ; Queen Charlotte Islands : Red 

 Sea and Japan [fide Waters). 



ScMzoporella discoidea. Busk. 



In specimens from the Adriatic the small avicularium on 

 the front of the cell is sometimes replaced by a long spatulate 

 form. The dependent lateral appendages were not noticed. 



Range. Britain (south and west and Shetland) ; Ireland 

 (west coast) j Algiers ; Madeira. 



ScMzoporella sanguinea^ Norman. 



Of very common occurrence. Avicularia are frequently 

 wanting altogether ; when present they are rather small, sub- 

 erect with a pointed mandible, placed close to the orifice on 

 one side, about on a line with the lower margin, directed 

 obliquely upward ; or in the corner at the top of the cell on a 

 line with the upper margin of the orifice, either on one side or 

 on both. Occasionally two or three are present on the front 

 wall of the cell. The cells are invested with a strong epi- 

 thecal covering, and the surface of the zoarium has a bright 

 and varnished appearance. 



Range. Britain (south-west and Channel Islands) ; Naples ; 

 Madeira; Florida; Queen Charlotte Islands. 



Schizoporella linearis^ Hassall (unarmed var.). 



A variety of this common species occurs which is quite 

 destitute of avicularia ; in other respects it seems to agree 

 with the normal form. The species is included in Heller's 

 list. 



SCHIZOTHECA, Hincks. 

 Schizotheca Jissa, Busk. 



Range. Britain (south-west and Channel Islands) ; Ireland 

 (west coast) ; Naples. 



* " Durch ein kleines gelbea Zahnclien (avicularium) ausgefiillt." 



