TUNICATA OF THE L.M.B.C. DISTRICT. 119 
The variety r?ssoana (sometimes considered as a distinct 
species, Clavelina rissoana, M.-Edw.), which differs from 
the ordinary form in having the pigmented lnes on the 
thorax of a pure white colour in place of being some shade 
of yellow, was found on the South Spit, Puffin Island, in 
January, 1888. 
Perophora listeri, Wiegmann. 
We had previously obtained this species only from the 
Isle of Man. Shortly after the publication of the First 
Report, however, we dredged some colonies during the 
cruise of the ‘“‘ Hyena,” along the north coast of Anglesey 
(the locality in which it was found by Edward Forbes 
and McAndrew in 1843), in May, 1886; and we also 
dredged some fine colonies, attached to Hydrallmania 
falcata, on the ‘‘ Weathercock”’ expedition of September, 
1886, about twenty miles 8.E. of the Isle of Man, from a 
depth of twenty-five fathoms. 
Family. ASCIDIIDE. 
In 1882, in the ‘‘Challenger’’ Report, I divided this 
family into three sub-families:—the Hypobythine, the 
Corelline and the Ascidine. Roule subsequently formed 
two sections, the Cione and the Phallusiw in the last 
sub-family. The Cionz includes the genera Ciona and 
Rhopalona, and the Phallusie the genera Ascidiella, 
Ascidia and Phallusia. 
ASCIDINZA. 
Ciona intestinalis, Linn. 
This species was recorded in our former report from 
Hilbre Island and the Isle of Man. It has since been 
found as follows :— 
During the ‘ Weathercock”’ expedition of 1886, about a 
