clavellinjdjE. 595 



Sub-gcn. cystingia, Mac Leay. 



Body globular ; test sub-coriaceous ; anal orifice irregular, 

 terminal. 



Griffitbsii, Mac Leay. 



Fam. CLAVELLINID.E. 



Individuals each having its own heart, respiration, and 

 system of nutrition, but fixed on peduncles that branch 

 from a common stem, through which the blood circulates in 

 opposite directions. 



Genus CLAVELLINA, Savigny. 



Individuals connected by creeping tubular prolongations 

 of the common tunic. Body elongated, erect, more or less 

 pedunculated; test smooth and transparent; thoracic re- 

 gion usually marked with coloured lines ; anal and oral 

 orifices without rays. 



Syn. Hho^a\ea,Phi/ij)pi. 



Ex, C. lepadiformis, 0. F. M tiller, pi. 133, fig. 7. 



These are small, transparent, compound Ascidians found 

 adhering to stones and sea-weed by means of curious root- 

 like prolongations of their outer tunic, by which a circula- 

 tion is kept up common to the entire community. They 

 are found in Great Britain, Greenland, and the Mediter- 

 ranean. 



