122 B1UTISH TUXICATA. 



conspicuous, and have a beautiful dendritic appearance, 

 their white colour contrasting* well with the brown tint 

 of the cellular matter which is spread over the greater 

 portion of the alimentary tube : the cells of this 

 matter are moderately laro'e. 



e/ o 



This is the most common species on the north-east 

 coast of England, where it is brought in abundantly on 

 the fishermen's lines, frequently in groups of several 

 together. They are usually attached to Gemellaria 

 lorwulata or some other zoophyte, and in the young 

 state frequently cover it like a cluster of grapes. A 

 group of this kind is represented by Sir John G. 

 Dalyell in Plate xxxv of his ' Rare and Remarkable 

 Animals of Scotland.' When young they are hyaline 

 and almost colourless. From the narrowness of the 

 base of attachment the individuals have not always 

 room to expand ; in this case the lower part of the test 

 is lengthened with a flat pedicle sometimes as long as, 

 or even longer than, the body of the animal. Modio- 

 lui'in, marmorata is often found imbedded in the test. 



Mr. Norman informs us that when dredging in 73 

 fathoms water off North Uist in Shetland, a large 

 dredge came up filled with Ascidia soi'<li<ln, in such 

 quantities that some hundredweights of them had to 

 be thrown back into the sea. 



20. Ascidia canina Miiller. 

 (PL XVIII, fig. 5; PL XX, fig. 8.) 



Ascidia canina MULLER Zool. Dan. Prod. [1776], p. 225, no. 

 2734, and Zool. Danica, II [1788], p. 19, pi. Iv, f. 1-3; 

 [BRDGUIERE] Vers, I [1789], p. 152, pi. Ixiv, f. 1-3, in 

 Encycl. Meth ; [THOMPSON in Ann. Nat. Hist. (1) XIII 

 (1844), p. 434;] FORBES and HANLEY Brit, Moll. I [1848], 

 p. 31 ; THOMPSON Xat. Hist, Ireland, IV [1856], p. 360 ; 

 [MclNTOSH in Proc. R. Soc. Edinb. V (1866) p. 605]. 



Pliallnxta canina SAVJGNY Mem. Anim. sans Vert,, pt. 2 

 [1816], p. 171. 



Body elongated, subcylindrical, rather soft, adhering 

 at the base by fibrous prolongations of the test. 



