CHAP. IV. |} THE CRUISES OF THE ‘ PORCUPINE, 181 
Geryon tridens, is a fine Norwegian species. With 
these are associated two forms of a more southern 
character, Znachus dorsettensis and Hbalia cranchii, 
which I should not have expected at so great a 
depth.” The echinoderms were a very northern 
group. They included Cidaris papillata, Echinus nor- 
vegicus and EF. microstoma, the young of Brissopsis 
lyrifera, Astropecten arcticus, Archaster andromeda, 
and A. parellii, with a small specimen of Ophio- 
musium lymani, several examples of Ophiacantha 
spinulosa, and as usual one or two of the universally 
distributed Eehinocucumis typica. Dr. McIntosh, to 
whom the annelids were referred, notices as a species 
supposed to be specially northern, Thelepus coro- 
natus, Fas.; and Holtenia carpenteri, our familiar 
anchoring sponge, of all sizes and ages and in consider- 
able numbers, was entangled in the hempen ‘ swabs.’ 
July 9th.—The wind still too light for effective 
work. Dredged in 717 and 358 fathoms, the assem- 
blage of mollusca having the usual character of being 
to a great extent common to the recent fauna of the 
seas of Norway and to the plocene fauna of Sicily 
and the Mediterranean. It included on this occasion 
Terebratella spitzbergensis, an arctic and Japanese 
form, Pecten vitreus, and P. aratus, Leda pernula, 
Trochus suturalis, Odostomia nitens, and Pleurotoma 
hispidulum. Among the echinoderms was a_ fine 
specimen of Brisinga endecacnemos, ABSJORNSEN, 
very markedly different from B. coronata, which was 
the form commonly met with in the north. The 
corals were represented by Amphihelia oculata and 
Desmophyllum crista-galli. Among the annelids were 
Pista cristata, O. F. Mtruur, and Trophonia glauca, 
