270 
MEMOIRS AND PAPERS : WALTER PERCY SLADEN. 
Description of Mimaster, a new genus of Asteroidea from 
the Faroe Channel. Trans. Roy. Soc, Edin., Yol. XXX., 
pp. 579-584, 1883. 
On Astrophiura permira, an Echinoderm-form intermediate 
between Ophiuroidea and Asteroidea. Proc. Roy. Soc, 
Vol. XXVII., pp. 456-457, 1878. 
Astrophiura permira, an Echinoderm intermediate between 
Ophiuroidea and Asteroidea. Zoolog. Auzeiger, Jg. II., 
1879, pp. 10-11. 
On the structure of Astrophiura, a new and aberrant genus 
of Echinodermata. Ann. and Mag. Nat. Hist., ser. 5, 
Vol. IV., pp. 401-415, Dec, 1879. 
On Lepidodiscus Lehouri, a new species of Agelacrinitidae 
from the Carboniferous series of Northumberland. 
Abstr. Proc. Geol. Soc, Lond., No. 373, p. 4, 1879 ; 
Quart. Journ. Geol. Soc, Vol. XXXV., pp. 744-751, 
1879. 
Note on the Occurrence of Pedicellaster (Sars) in the Far 
North. Ann. and Mag. Nat Hist., ser. 5, Vol. V., pp. 
216-217, March, 1880. 
On a remarkable Form of Pedicellaria, and the Functions 
performed thereby ; together with general observations 
on the allied Forms of this Organ in the Echinidse. 
Ann. and Mag. Nat. Hist., ser. 5, Vol. VI., pp. 101-114, 
Aug., 1880. 
On the Homologies of the Primary Larval Plates in the 
Test of Brachiate Echinoderms. Quart. Journ. Micr. 
Sci., new ser., Vol. XXIV., pp. 24-42, Jan., 1884. 
On Traces of Ancestral Relations in the Structure of the 
Asteroidea. Proc. York. Geol. and Poly tech. Soc, new 
ser.. Vol. VIL, pp. 275-284, 1881. 
On the Genus Poteriocrinus and allied Forms. Proc. West 
Riding Geol. and Polytech. Soc, Vol. VI. (new ser.. Vol. 
I.), pp. 242-253, 1877. 
Bibliographical Notice : Report upon the Crinoidea collected 
during the voyage of H.M.S. "Challenger" during the 
