54 BRITISH TUNICATA. 



rather stout, yellowish brown or nearly colourless, set 



^ e/ *^ 



with short, stout fibrils to which the sand adheres. 

 Mn a tie transparent, of a purple or lilac colour, showing 

 the viscera through, especially the ovaries, which form 

 white crescent-shaped double lines on each side. Ten- 

 tacular filaments bipinnate, alternately large and small. 

 Branch iul *ac with six deep folds on each side, the 

 meshes spirally but irregularly convoluted. 





FIG. 42. Test of Molgula siphonata. One and a half nattiral size. 



Length, including the tubes, [an inch and a quarter 

 to] an inch and a half; breadth nearly the same but 

 variable. 



Hab. Coralline zone. 



ENGLAND. Cullercoats and Xewbiggin, Northumb., 

 where it is occasionally brought in on the fishermen's 

 lines (Aider $ Hancock). Torbay, Devon (Alder). 



First record. Alder, 1850. 



Molipda xiphoiuita is generally found attached to the 

 slender stems of flexible zoophytes from the coralline 

 zone, and is not infrequently partially concealed by 



