REPORT ON THE ANNELIDA. 
531 
A fragmentary calcareous tube occurs in a slight groove (apparently formed by the 
animal) on a nodule of manganese trawled at Station 289 (in the middle of the Pacific), 
October 23, 1875; lat. 39° 41' S., long. 131° 23' AV. ; depth, 2550 fathoms; bottom 
temperature 34°‘8, surface temperature 54°'5 ; sea-bottom, red clay. The track is little 
more than half a line in diameter, and as only the attached part of the tube (lower curve) 
remains, it is difficult to say whether we are dealing with a perfect or imperfect 
organism. The softness of the calcareous track causes some doubt as to the nature of 
the structure. 
Ditrypa, Berkeley. 
Ditrypa arietina, 0. F. Muller (PI. LIV. fig. 6). 
Habitat. — Dead tubes inhabited by Sipiinculi, and with adherent patches of Nullipore, 
were dredged off Tenerife in 70 fathoms, February 10, 1874. Similar tubes, inhabited 
by Gephyreans, occurred at Station 75 (off Fayal, Azores), July 2, 1873 ; lat. 38° 38' N., 
long. 28° 28' W. ; depth, 450 fathoms ; sea-bottom, volcanic mud. The same species was 
dredged in the “Knight Errant,” at Station 3, August 3 and 4, 1880 ; lat. 59° 12' N., 
long. 5° 57' AV. ; depth, 53 fathoms, off the island of North Rona. 
The specimens agree in appearance with those from the Mediterranean, the tubes 
being marked transversely with brownish bars. 
Grube^ in his Philippine Annelids describes a new species [Ditippa p'raci7/ma), which 
does not, however, seem to differ essentially from the typical form. 
A peculiar fusiform glistening porcellanous tube comes from 470 and 390 fathoms 
off Sombrero and St. Thomas, AVest Indies, but as it contains nothing but mud its 
position is uncertain. 
Family Tomopterid^. 
Tomopteris, Eschscholtz. 
Tomopteris carpenteri, De Quatrefages. 
Tomopteris carpenteri, De Quatrefages, Hist, Nat. des Annel, p. 227, pi. xx. figs. 1, 2. 
Habitat. — Found in considerable numbers at the surface of the sea between 
Kerguelen and Macdonald Islands, February 2, 1874. 
1 Op. cif., p. 279. 
