698 
Proceedings of the Royal Irish Academy. 
on board ship during the cruise, which he has kindly sent for my in- 
spection, informs me that the actinal surface of this starfish (of which 
he made a sketch) was of a deep blood-red colour before the specimen 
was placed in alcohol. 
Locality.— Ldi. 51° 1'jS",, Long. 11° 50' W. Depth 750 fathoms. 
Remarlcs. — This species is unlike any of the other Atlantic forms 
described. It resembles Hymenaster pellucidus^ Wyville Thomson, in 
the formula of the adambulacral armature, but is at once distinguishd 
by its large size and coarse habit, as well as by the whole character of 
the abactinal surface. In the last-mentioned aspect Mymenaster 
yiganteus is perhaps more nearly related to Hymenaster ylaucus, Sladen, 
from South of Omae Saki, off Japan, than to any other species, but it 
is distinguished by the general form and habit, by the character of the 
supradorsal membrane, by the character of the adambulacral armature, 
and by the armature of the mouth-plates. JSymenader giganteus is 
distinguished from Hymenaster memhranaceus, "Wyv. Thomson, by the 
difference of the supradorsal membrane, of the armature of the adambu- 
lacral plates and mouth plates. 
15. Crihrella oculata, var. ahyssicola, ]N"orman. 
Locality. — As last. Depth 750 fathoms. 
16. Asterias ruhens, Linne. 
Locality. — Long Island Sound. Depth 4 fathoms. 
17. Brisinga coronata, Sars. 
Locality. — About 56 miles off Dursey Head. Depth 345 
fathoms. 
IIi.—OPHirEOIDEA. 
1. Ophioglypha lacertosa (Linck), Lyman. 
Locality. — Long Island Sound. Depth 4 and 5 fathoms. 
2. Ophioglypha alhida (Forbes), Lyman. 
Depth 6 fathoms. 
3. Ophioglypha signata, Verrill. 
Locality. — About 56 miles off Dursey Head. Depth 345 
fathoms. 
A young example, which approaches very closely indeed in cha- 
racter to Ophioglypha affinis (Liitken), Lyman. The form of the 
mouth-shields in this specimen resembles that of 0. affinis much more 
