154 “EXPLORATION OF THE GULF OF MAINE. 
miles northwest in one hundred and seventeen fathoms with the ' 
same soft tenacious mud; the temperature 361° to 434°. Here 
occurred a smaller Geryon, perhaps’ a male; and apparently, 
judging by Wyville Thompson’s figure in his work ‘The Depths 
of the Sea,” p. 881, very closely related to Kroyer’s Geryon tridens; — 
with this was Associated the western Pelican’s foot shell, Apor- o 
rhais occidentalis, and other shells and worms, and a variety of i. 
Ophioglypha afinis of Lütken, dredged the previous year by Messrs. ^, 
mith and Harger at St. George’s Bank. This day ended our , 
explorations, and at night the Bache arrived in Salem. 
The results of the month’s work besides adding quite a number 
of forms before unknown to exist on our coast, and a few new to 
science, show that the fauna of the deeper portions of the Gulf of 
Maine is almost purely arctic, the temperature at about one hun- 
dred fathoms being from 364° to 39°. The only apparent exception 
to this arctic fauna is the presence of a dead broken specimen of 
the coral Deltocyathus, which however is not improbably a mem- | 
ber of the deep sea Atlantic fauna, and may be found living nearer 
the edge of the Gulf stream in the neighborhood of the St. George’s 
Banks. The fauna of the sandy portions, such as around the — 
southern portion of Stellwagen’s Bank, is similar to sandy beaches 
: and adjacent bottoms on the coast of Labrador. As. the arctic 
fauna is best known in northern Norway, so our researches this 
year have brought to light several forms hitherto only known from — 
Norway, and show that the fauna of that country is identical with | 
that: of a region so far south as the area. between Cape Sa 
and Cape Cod, and bounded on the southeast by the Gulf stream. 
That the waters of the Gulf of Maine do not support a fauna 
purely arctic is shown in the absence of Rhynconella psittaced, 
while Ophioglypha nodosa so abundant in shallow bays in Labra- 
3 - dor- -is also wanting. Moreover Cardium islandicum, C. Haystis 
es and Serripes Grænlandica do not occur in anything like the abun- 
ee „dance and size in which they may be found insshallow water (five 
to ten T om the coast of Labrador. ; 
Eai 
de Punctostriata, Dovattumscietate, *Newra ardi, N. pellucida, Macoma 
+ on , Lucina filosa, Astarte lens, *Leda mvt oe 
Tearen T obesa, Mirgi um vi'reum. , Polyzoa, merate tucernaria, C 
ramu _Diseopora ra Skenii, Hornerea Pie sa bgraci 
2 re Otteri,” Ophiog hioglypha Sarsi, 0 E 
