MR. ALDER ON THE ZOOPHYTES. 191 
Fern Berwick Durham 
Islands. Bay. Coast. 
13-17fms, 26-46fms, 23-35 fms. 
* 
Kchinus miliaris, Leske. Several from 24-46 
fathoms. 
neglectus, Lamk. ‘y Very common in 13 
| fathoms, 
Kchinocyamus pusillus, Miller, * * Several from 26-46 
fathoms, 
Spatangus purpureus, Miiller * - Do. 35-46 fms. 
Brissus lyrifer, Forbes es Do. 35-46 fms, 
Amphidotus roseus, Forbes = 3 Do. 35-46 fms. 
cordatus, Pennant * ‘Two specimens. 
* 
Two or three from 
35 fathoms. 
Thyone fusus, Miller * Two from 35 fathoms 
raphanus, D. 5° K. . * Two specimens from 
46 and 35 fms. 
Cucumaria elongata, D. 5° K. 
Report on the Zoophytes, by Joshua Alder. 
The Zoophytes collected do not afford much to remark upon. 
Those dredged on the Durham coast are the most interesting. 
Among them is a Scrupocellaria not yet described as British, 
but which I had previously got on this coast. It proves to be 
the S. Delili, a species inhabiting the Mediterranean, and which 
has also been met with at Madeira. The rare Hydractinia areo- 
lata was procured alive and bearing medusoids, which Mr. Hodge 
had the opportunity of examining. They differ from those I had 
previously described in having eight tentacles of equal length, 
without intermediate tubercles. In all other respects they agree 
with those before described, and were attached, as in the former 
instance, to the encrusting base of the polypary. No difference 
could be detected in the polypes themselves. A small Atrac- 
tylis was also met with alive, and the development of its medu- 
soids examined by Mr. Hodge. They agree with those of the 
Perigonimus minutus of Professor Allman, described in the 
Report of the British Association for 1862, in having the um- 
brella conical at the top, and should probably be referred to that 
species, though the polypary is rather larger than there described 
and occasionally slightly branched. The difficulty of distinguish- 
ing the species of this genus is very great. The specimens were 
got in 35 fathoms off Seaham, attached to a shell of Turritella 
communis and to the operculum of a Fusus. 
