ON THE DREDGING OF THE NORTHUMBERLAND COAST. 121 
dredged in Berwick Bay, which appear to be the Holothuria pellucida of 
Miiller, and not the Cucumaria hyalina of Forbes, the latter of which appears 
to belong to the genus Zhyone. Should a further examination confirm this 
view, the species is new to Britain. 
Thyonidium commune was also added to our local fauna. 
No Zoophytes were obtained previously unrecorded in Mr. Joshua Alder’s 
“Catalogue of the Zoophytes of Northumberland and Durham,”’ published in 
the ‘ Transactions of the Tyneside Club ;’ nevertheless the list is a good one, 
containing as it does 77 species, viz.— 
Polyzoa . 225.2. 27 
Hydrozoa....... 40 
Actinozoa....... 10 
Among the Polyzoa, Menipea ternata and Cellularia Peachii, two northern 
deep-water species rare on other parts of the English coast, were procured in 
considerable abundance. Of Bugula Murrayana and B. fastigiata, also 
northern forms, only two or three specimens were obtained. 
Among the Hydrozoa the most noteworthy is Sertularia fusca, a species 
peculiar to the north-eastern coasts of England and to Scotland. Sertularia 
‘pinaster was also met with, and S. tamarisca with female capsules. 
The Medusidee are not included in Mr. Alder’s Catalogue just referred to, 
and of these very few species were identified. 
A very fine and strikingly beautiful Medusa was, however, taken some 
seventy or eighty miles from the coast, {which appears not to have been 
hitherto met with in our seas; nor, indeed, have we seen the description of 
any genus to which it would seem to be assignable. 
The Rey. A. M. Norman describes it as follows :— 
“The hydrosoma is inverted cup-shaped, moderately convex, about 41 
inches in diameter, tinged with deeper and paler shades of indigo-blue. 
«The margin is divided into eight major lobes, each of which is subdivided 
into four minor lobes, making thirty-two lobes in all. The disk of the hydro- 
soma is elevated into sixteen radiating ridges, alternating with as many 
intermediate furrows. A radiating canal, of an intenser blue than the rest 
of the hydrosoma, passes down each of the ridges; and these radiating canals 
terminate in the deeper sinuses of the margin and in the central sinuses of 
the major lobes, while each furrow is traversed by a white vessel whose 
distal extremity is situated at one of the intermediate sinuses of the major 
lobes. Numerous transverse branches proceed from the blue and elevated 
canals, and pass down the slopes of the ridges to the base of the furrows. 
These transverse vessels are recognized by the deeper tint of blue which 
marks their course. 
“There are no tentacles on the margin of the disk; but, situated a short 
distance within the margin, opposite each of the greater sinuses, there is 
seen a semicircle of about forty pale-yellow simple tentacles, which are so 
short that they scarcely hang below the margin of the disk. The horns of 
the semicircle of tentacles point outwards. 
«There are eight eyes, which are placed at the centre of the major lobes, 
on the blue canal, at a short distance from the margin. 
“The oral appendages are greatly developed in the form of four (?) large, 
many-folded, ochreous-yellow curtains, exquisitely margined with a short, 
finely-cut fringe. The length of the curtains, as they hang suspended in the 
hydrosoma, is somewhat greater than their united breadth, Q 
