718 
Proceedings of the Poyal Society 
Average dimensions, — diameter of disk, 12-15 mm. ; thickness 
rarely more than 5 mm. 
Ophiactis Bcdlii> The bathymetrical range of this species is ex- 
tended to 730 fathoms. 
Ophiocten sericeimi dredged by ITM.S. “Porcupine” at six 
stations, the depths varying from 542 to 2435 fathoms, its bathy- 
metrical range being thereby greatly extended. 
Ophiopholis aculeata. Bathymetrical range extended to 560 
fathoms. 
Ophiothrix fragilis. Bathymetrical range extended to 516 
fathoms. 
Gorgonocephdlm eiicnemis and Ophiacantha spectabilis are new to 
British seas. 
Ophiactis ahyssicola. This species has not been previously ob- 
tained in British seas, and its bathymetrical range is extended from 
400 to 767 fathoms. 
Opliioscolex piirpurmis. This species is also an addition to the 
British fauna, and its bathymetrical range is extended from 200 to 
767 fathoms. 
Ophioglypha signata^^ Verrill (Pi. Vll. figs. 4-8), was first dis- 
covered by Professor Verrill off the north-eastern coast of the United 
States (100-258 fathoms),^ and has again been recorded by Mr 
Lyman in the Proceedings of this Society (vol. xi. p. 707). As 
no figure of it has yet been published, I have given one on the 
accompanying plate. 
Amphiufa filiformis. Bathymetrical range extended to 555 
fathoms. 
These few matters of systematic aiid descriptive interest being 
disposed of, we may proceed td discuss the distributional problems 
suggested by the material in hand. The importance of the Faroe 
Channel as a field for zoological investigation lies, as is well known, 
in the fact that there are here two areas not far separated, and 
resembling each other in depth and physical conditions generally, 
save only that in one the average temperature of the bottom water 
* AmeTi Joilr Sci. and Arts^ vol.- cxxiii. pp. 218, 220, 1882. 
