ASCIDIA XORAHNI. 135 



loop and are seen at the right side ; the ramifications 

 are disposed in an irregular radiating manner, and are 

 spread over the whole of the looped portion of the 

 intestine. The male ca3ca are small and appear at 

 both sides of the intestine, but are most conspicuously 

 displayed at the centre of the right side of the intes- 

 tinal loop. 



The species is closely related to A. Miltm, but is 

 distinguished at first sight by its greater size, its 

 rougher and more spinous test, and by its peculiarly 

 delicate colouring ; the mode of attachment, too, is 

 different, and so are many of the minor points of 

 detail. But the best distinguishing feature is to be 

 found in the left oral appendages, which, in this 

 species, are large and denticulated, while in A. *<'<ilr 

 they are simple and very narrow. 



[Var. resplendens var. nou.~] 



A brilliantly-coloured variety of this species occurs 

 at Polperro, Cornwall. This beautiful variety might 

 readily be mistaken for a distinct species did it not 

 agree in every essential character with the type form. 

 The mantle is of a clear yellowish colour, with the 

 centre portion of the left side irregularly blotched with 

 brilliant carmine. The blotches are usually more or 

 less blended and occasionally are entirely fused, so as 

 to produce a uniform patch of that colour. The tubes 

 are also streaked longitudinally with carmine, though 

 not always with much uniformity. The right side of 

 the mantle is paler in hue and is entirely devoid of 

 blotches or spots. The test is exceedingly rough 

 and spinous, and, though white, is sufficiently trans- 

 parent to exhibit the brilliant pallial colouring beneath. 

 Like the normal form it is attached to Fuel diagonally 

 by the side of the base, but sometimes rather exten- 

 sively. 



We have much pleasure in dedicating this species to 

 our friend the Rev. A. M. Norman, to whom we are 



