244 LIVERPOOL BIOLOGICAL SOCIETY. 
the middle of the lower surface, the edges being free all 
round. The specimens vary considerably in their colour 
and in the size and arrangement of the ascidiozooids. 
This species is also common at the south end of the Isle 
of Man. 
Family. PolycLINID2. 
Morchellium argus, Milne-Edwards. 
Not uncommon under stones on the South Spit, Puffin 
Island, about low water mark. The peduncles of most of 
the colonies are quite sandy on the surface, and sections 
show that there are sand grains in the interior also, so that 
the test is beginning to assume an appearance like that 
characteristic of the genus Psammaplidium.* 
This species was also found, in October, 1887, at Black 
Point, Anglesey, opposite Puffin Island, and was dredged 
off the Anglesey coast in the ‘‘ Hyzena”’ expedition of 1886. 
Amaroucium proliferum, Milne-Edwards. 
Collected at Douglas in August, 1886. Some specimens 
were also dredged off the north coast of Anglesey during 
the ‘‘ Hyzena”’ expedition of 1886. 
Family. DIDEMNID&. 
Leptoclinum candidum (?), Savigny. 
Some very fine specimens were dredged from the 
‘‘ Hyena’ on May 20th, 1888, between the Calf of Man 
and Port Erin from a depth of twenty fathoms. They are 
attached to a worm tube and to a specimen of Hyas araneus. 
Leptoclinum maculosum, Milne-Edwards. 
A large specimen was obtained on the South Spit, Puffin 
Island, on September 8th, 1888, at low water mark, and 
another in July, 1888. 
* Zool. Chall. exped., Report upon the Tunicata, part ii. p. 237. 
