274 
MEMOIRS AND PAPERS : WALTER PERCY SLADEN, 
Loven. Ann. and Mag. Nat. Hist., ser. 5, Vol. XTY., 
pp. 225-242, Oct., 1884. 
Objections to the Genera Pseudopygaulus Coquand, Trachy- 
aster Powel, and Ditrf^master Munier-Chalmas. Their 
species restored to JLolampas Dune, and Sladen, and 
Hemiaster Desor. Ann. and Mag. Nat. Hist., ser. 6, 
Vol. II., pp. 327-336, Oct., 1888. 
A Monograph of the British Fossil Echinodermata from the 
Cretaceous Forraations (Asteroidea). Part I., Palseonto- 
graphical Society, Vol. XLIV., pp. 1-28 ; Plates I.-VIII. 
(issued for 1890), April, 1891. 
Do. — Part II. (Asteroidea), Palseontographical Soc, Vol. 
XLVL, pp. 29-66; Plates IX.-XVI., 1893. 
