168 REPORT—1843. 
valve above 180 and under 200; and 1 Univalve, 4 Lamellibranchiate, and 1 
Palliobranehiate Bivalve above 200 fathoms. 
The Mollusea found alive at the greatest depths were Area imbricata in 
230 fathoms ; accompanied by Dentalium quinguangulare. At 180 fathoms 
living examples of Nucula egeensis, Ligula profundissima, Neera atienuata 
and costellata, Arca lactea, and Kellia abyssicola oceurred. Trochus mille- 
granus was taken alive in110 fathoms, along with the Dentalium pusillum of 
authors, which proved to be an annelide of the genus Ditrupa, and of which 
three species live in this region. 
Pecten hoskynsii, Lima crassa, Nucula egeensis, Scalaria hellenica, Par- 
thenia fasciata and ventricosa, all new species, have been found in no other 
region. Ligula profundissima, Pecten similis, Arca imbricata, Dentalium 
quadrangulare and Rissoa reticulata, are more prolific of individuals in 
this region than in any other. Ligula profundissima and Dentalium quin- 
quangulare are the most generally diffused species below 105 fathoms ; the 
former being present in eleven localities, the latter in seven. The localities 
examined were eleven in number and far apart from each other, extending 
from Cerigo to the coast of Lycia. 
The Bullea angustata, Rissoa acuta, Cerithium lima and Teredo are pro- 
bably only stragglers in this region. 
Several Ophiuride are true inhabitants of the eighth region; as Ophiura 
abyssicola, Amphiura florifera, Amphiura chiagi and Pectinura vestita, all well 
adapted by their organisation to live in the white mud of great depths. The 
only other Echinoderm was Echinocyamus at 200 fathoms, which however 
was not taken alive. The Zoophytes are Caryophyllia cyathus, Aleeto and 
an Idmonea, which occurs in very deep water. Small sponges of three 
genera were taken alive as deep as 180 fathoms. The deepest living Crus- 
tacea occurred at 140 fathoms, and the carapaces of small species are fre- 
quent. Besides the Ditrupe, annelides of the genus Serpula were taken 
in the greatest depths explored. Foraminifera are extremely abundant 
through a great part of the mud of this region, and for the most part appear 
to be species very distinct from those in the higher zones. Representatives 
of the genera Nodosaria, Textularia, Rotalia, Operculina, Cristellaria, Bi- 
loculina, Quinqueloculina and Gilobigerina are among the number. 
TesTACEA oF Reaion VIII. 
Lamellibranchiata. 
Teredo. Arca lactea. 
Ligula profundissima. scabra. 
Corbula anatinoides. imbricata, 
Nevra cuspidata.* tetragona. 
costellata.* Nucula polii. 
attenuata. striata.* 
Pandora obtusa. zegeensis.* 
Thracia pholadomyoides. Lima elongata. 
Kellia abyssicola.* crassa. 
oblonga. Pecten dumasii. 
Asiarte pusilla. similis. 
Venus ovata. fenestratus. 
Lucina ferruginosa. hoskynsi. 
Cardium minimum, Ostrea cochlea. ? 
Cardita squamosa. Anomia polymorpha. 
