82 BRITISH TUNICATA. 



Diameter of mass about an inch and a half (38 

 mm.). 



Nab. On the underside of stones within tide- 

 marks (Alder). 



ENGLAND. Cullercoats, Northumb., rare (Alder). 

 First record. Alder & Hancock ; coll. Alder. 



5. Botrylloides radiata Alder & Hancock. 

 (Plate LXIV, figs. 8-11.) 



Botrylloides radiata ALDER & HANCOCK in Trans. Tyneside 

 Nat. Field Club, I [1848], p. 206; FORBES & HANLEY 

 Brit. Moll. II [1849], p. 371 ; [COCKS in Rep. R. Cornw. 

 Polyt. Soc. for 1849 (1850), p. 75]. 



Colony (PI. LXIV, figs. 8 and 9) transparent, 

 yellowish-olive or nearly colourless, with pale yellow 

 gemma? and marginal tubes. 



Individuals (PL LXIV, fig. 10) rather small, pale 

 ochreous yellow or straw-coloured, spotted with white 

 and having a paler rim around the branchial aperture 

 with rays diverging from it and uniting into a disc 

 beyond, giving the whole a petaloid or \vheel-like 

 appearance ; a darkish line down the thorax ; the 

 systems arranged in rather short compact folds, in 

 some parts occasionally becoming nearly circular. 

 The common cloaca! orifices at short distances apart, 

 largish, slightly tubular, and with undulating margins. 



Diameter of mass an inch (25 mm.) or upwards. 



Hab. On the underside of stones between tide- 

 marks (Alder). [On the under surface of stones and on 

 stems of the young Fucus serratns (Cocks). ,] 



ENGLAND. Cullercoats, Whitley, and Bamborough, 

 Northumb. (Alder). [Grlasson's beach, Bar Point, etc. 

 Falmouth, Cornwall (Cocks). ,] Douglas, Isle of Man 

 (Aider}. 



First record. Alder & Hancock, 1849 ; coll. Alder. 



A transparent white variety with opaque white 

 markings sometimes occurs (PI. LXIV, fig. 11). 



