180 DISTRIBUTION OF BRITISH ECHINODERMS. 
Not known Number 
above of Species, 
500 fms. Stichopus tizardi, Zoroaster fulgens, Astropecten spheno- 
PHAR. «n't elena heat ee Os x PRS By ele mee 3 
400 fms. Odinia pandina, Ophiopus arcticus .. 1.61.00 reece eens 2 
250 fms. Rhegaster murrayi, Brisinga coronata, Ophiura sarsi, O. 
signata, Ophiobyrsa hystricis, Ophiomyxa serpentaria, 
PROTMOSOMG UNANUS Hick aehineh Obs te tie lelole hereon 7 
100 fms. Plutonaster bifrons, Pontaster pareli, Nymphaster subspi- 
nosus, Corethraster hispidus, Brisinga endecacnemos, 
Ophiomusium lymani, Ophioscolex glacialis .......45. is 
We see, then, that of the 126 species as to whose bathymetrical 
distribution we have some information, 
3 occur at or below the 1000 fm. line. 
5 others a ss 750 es 
3 bh) 39 99 500 ”° 
2 99 bh) 99 400 bh) 
7 99 vb) 99 250 99 
i bP rb) rb) 100 39 
On the other hand, 
18 extend beyond the 1000 fm. line. 
9° >,,77 to the 1000 
28 » 750 
22s, %9 500 4 
Aw s: 29 250s, 
Dy » 200s, 
6» %» 150, 
ENON Gs > 120, 
oe ss 5 100 5 
3» » 90» 
3 99 red 80 br) 
3 99 9 70 9 
al 99 ” 60 9 
5 ” 9 50 92 
2 ” 39 40 99 
3 ” ” 30 ”? 
2 ” 29 20 99 
if bP 9 10 bh) 
Of the six as to which we have no definite information, we may 
suppose that none were dredged from more than 100 fms. 
Limiting ourselves, however, to the 126, we note :— 
(1) Only 13 are limited by the 50 fm. line. 
(2) Only 27 7 5 LOO 
(3) While 22 reach the 500 Pr 
(4) And 28 a 750 
