284 LIVERPOOL MARINE BIOLOGY COMMITTEE REPORT. 



This species is undoubtedly a Polycyclus* It forms 

 rounded masses up to five cm. or more in length and 

 breadth, and 1*5 cm. in thickness. These colonies are never 

 incrusting, and are usually very slightly attached to a frag- 

 ment of seaweed or a Zoophyte. Half a dozen specimens 

 were dredged ofi" Bradda Head, near Port Erin, on July 30th, 

 1885, from a depth of twenty fathoms, and one colony was 

 dredged ofi" the Halfway Rock, near Port Erin, in August, 

 from a depth of fifteen fathoms. This last specimen had 

 the test of a dark blue colour with brown Ascidiozooids. 



Several small colonies attached to Hydrallmania falcata 

 and other Zoophytes, which were dredged during the cruise 

 of the " Hy^na," on May 24th, 1885, off Bangor, from a 

 depth of ten fathoms, may possibly belong to this species or 

 to a closely allied one. They are certainly referable to the 

 genus PolycycluSf but although the colonies are small, the , 

 Ascidiozooids are larger and more conspicuous than in the 

 Manx specimens. The internal structure seems, however, 

 to be much the same in the two cases. 



In all the colonies the system of vessels in the test is 

 very well developed, and the terminal bulbs form conspicuous 

 red or brown dots which are clearly visible from the outside. 

 The tentacles are sixteen in number, eight large and eight 

 very small. The pigment masses which are placed in the 

 mantle over the median lateral tentacles in Polycyclus 

 jeffreysi are also visible in the Manx specimens. Some of 

 the smallest of the "Hyaena" specimens show pallial 

 budding in various stages, but no stolonial buds were 

 noticed. 



Botrylkts morio, Giard (?) 

 I refer to this species, with a certain amount of doubt, a 

 small colony of Botryllus, which was found adhering to 



* For the characters of the genus, see Herdtnan, "Challenger" Report, 

 " Tunicata," part ii, 1886. 



