694 Proceedings of the Royal Irish Academy. 
9. Nymphaster protentus^ Sladen. 
? Locality. 
A single example measuring R= 101 mm., r = 28 mm. There are 
occasional small pedicellarise on the marginal plates, but no spiniform 
granules whatever are present. The occasional presence of small spini- 
form granules on the marginal plates of large specimens of this species 
from the S.W. Coast of Ireland has been noted by Professor Je&ey 
BelP in examples dredged by the Eev. W. Spotswood Green, and by 
myself^ in an example dredged by Mr. G. C. Bourne. Mr. Bourne^ 
has given expression to the opinion of Canon ITorman, that JSfymphaster 
protentus is, in its younger condition, indistinguishable from Pentayo- 
naster subspinosus of the " Blake " expedition described by Perrier in 
1884. Mr. Bourne* has accordingly cited the specimens dredged by 
him under the name of JSfymphaster suhspinosus. The smallest ex- 
amples of Nymphaster protentus which I have examined do not, how- 
ever, support that view, and the character of the series of specimens 
in various stages of growth, which I have examined, appear to me to 
strengthen the opinion that the species are distinct. 
10. Zoroaster fulyens, Wyville Thomson. 
Locality— L^i. 51° 1' K ; Long. 11° 50' W. Depth 750 
fathoms. 
11. Stichaster roseus (0. F. MuUer), Sars. 
Depths 50-52 fathoms. 
12. " Neomorphaster eustichus, Sladen. 
Locality— Loi. 51° 1' K ; Long. 11° 50' "W. Depth 750 
fathoms. 
13. Pteraster p)ersonatus, n. sp. (Plate xxvii., figs. 1-5.) 
Marginal contour substellate ; interbrachial arcs well indented and 
somewhat angular ; the minor radial proportion being about 35 per 
cent. R = 70 mm. (approximately) ; r = 25 mm. 
Rays very broad at the base and tapering to a fine extremity, which 
is sharply recurved ; general form depressed ; abactinal surface con- 
vex over the disk, and bevelled gradually to the margin ; lateral 
fringe not conspicuous, or perhaps only on the inner part of the inter- 
brachial arc. 
1 "Ann. and Mag. Nat. Hist.," ser. 6, vol. iv., p. 435, 1889. 
2 Journ. Marine Biol. Assoc." (N.S.), vol. i., p. 327, 1890. 
3 Ibid., p. 327. 
* Ibid., pp. 307, 308. 
