ON THE DREDGING OF THE NORTHUMBERLAND COAST. 117 
about fifty miles from land, and continued at intervals of about five miles 
for the remainder of the distance. 
The depth of water never exceeded 40 fathoms, and ranged chiefly from 
25 to 35 fathoms, the bottom being mainly composed of fine sand and ooze. 
On the second cruise, the coast twenty miles off Coquet Island, and twenty 
to thirty miles off Berwick, was thoroughly dredged; in the latter locality the 
water attained a depth of 55 fathoms, being the deepest we possess off the 
Northumberland coast. The bottom consisted of coarse sand and gravel. 
The vessel employed was a steamer. 
The following gentlemen have, at the request of the two Societies, prepared 
lists of the specimens obtained, and are responsible for the determination of 
the species, viz. :— 
Mollusca (except Tunicata), Mr. H. T. Mennell. 
Mollusca Tunicata, Mr. Joshua Alder. 
Crustacea, Rey. Alfred Merle Norman. 
Pycnogonoidea, Mr. George Hodge. 
Echinodermata, Mr. George 8. Brady, 
Polyzoa, 
Hydrozoa, | Mr. Joshua Alder. 
Actinozoa, | 
Foraminifera, Mr. Henry B. Brady, F.L.S. 
The results, as arrived at by these gentlemen, are summarized below. 
Of Mollusca 136 species were obtained, viz. : 
Cephalopoda.......... il Proso- Opistho- Nudi-branchiata. 
Gasteropoda .......... 64 = 514+ 74 6 
Lamellibranchiata..... . 60 
Brachiopoda}.......... 0 
Panicata Se 11 
136 
No species new to science was obtained, and but one previously unrecorded 
as British. This is the Cynthia glacialis of Sars, two specimens of which had 
been previously obtained by Mr. John Stanger on the Northumberland coast, 
and noticed in the Tyneside Club Transactions under the provisional name of 
Cynthia vestita (Alder). It has since been ascertained, however, that Professor 
Sars had taken the species on the Norwegian coast, and published it in 1858 
under the name we now adopt. 
Four other species were added to those recorded in Mr. Alder’s excellent 
“Catalogue of the Mollusca of Northumberland and Durham,” published in the 
‘Tyneside Club Transactions,’ viz. Rissoa sculpta (Forbes and Hanley), new 
to the east coast of Britain, Hulima nitida (Lamarck), Hulima gracilis (Alder, 
MS.), and Syndosmya intermedia. 
Several species hitherto considered to be of great rarity on our coast were 
obtained in some plenty, e.g. Trophon Barvicensis, Mangelia Trevelyana, 
Chemnitzia fulvocincta, Sealaria Trevelyana, Trochus millegranus, Puncturella 
Noachina, and Lucina flecuosa. Of the rarer species previously recorded, 
there were found, but not abundantly, Mangelia teres, Natica Grenlandica, 
Philine quadrata, Cylichna strigella, Crenella decussata, and Newra cuspidata. 
Of the special varieties of the Dogger Bank which have hitherto only been 
taken on the fishing-lines, the only trace obtained was a single capsule of 
Fusus Turton, Further efforts are therefore required to ascertain the exact 
habitat. on our coast of the rare larger Fusi, of Buccinum (?) Dalet and Pano- 
