88 SPOLIA ZEYLANICA. 
plate much larger than elsewhere on abactinal surface ; distally 
one (sometimes two or three) becomes evidently larger than 
the others, and may even become a low tubercle. Terminal 
plate smaller than penultimate superomarginal, bearing three 
distinct tubercles distally. Inferomarginal plates correspond 
in number and position with superomarginals ; proximally 
they are uniformly granulated, but distally a group of granules 
on the upper distal part of each plate becomes conspicuous, 
and one of these tends to develop into a distinct tubercle. 
Actinal interradial areas small ; actinal intermediate plates only 
extend outwards as far as fifth inferomarginal ; these plates 
are uniformly granulated, with here and there, generally near 
the adambulacral plates, low foraminate or bivalved pedicel- 
larie. Adambulacral armature made up of an inner series of 
4—6 rather stout blunt spines, the middle ones the largest, and 
an outer series (on actinal surface of plate) of one or rarely two 
flattened blunt ovate spines ; if two are present, one is much 
smaller than the other, and commonly this smaller spine is 
replaced by a pedicellaria ; these ovate actinal-adambulacral 
spines are much larger than any other spines on the starfish. 
Oral spines stout and blunt, but not peculiar. Colour of dried 
specimen uniformly pale brown, not at all distinctive. Holo- 
type from Ceylon without data. 
This species is readily distinguished from squamulosus by 
the coarse granules of the superomarginal plates and the 
presence of abactinal tubercles ; actinally the adambulacral 
armature is distinguishably different. There is no other 
species known to me with which it needs comparison. 
17. Siraster squamulosus (Studer).—Three large (R=30 mm.) 
and well-preserved specimens prove Koehler is right 
in maintaining the validity of this species. But, as 
already stated, it does not seem to me proper to retain 
it in Stellaster. 
18. Anthenea pentagonula (Lam’k.).—Three small specimens 
of Anthenea agree well with specimens of the same 
size from Hong Kong, identified by Perrier as 
