£9. 
20. 
21. 
22. 
23. 
24. 
25. 
26. 
27. 
28. 
THE ECHINODERMS OF CEYLON. 89 
pentagonula. Lamnot satisfied that tuberculosa, Gray, 
from tropical Australia, is really specifically distinct. 
T have not yet found any tangible, constant differences. 
Anthenea rudis, Koehler—Two small but well-marked 
specimens give support to the validity of this recently 
described form. 
Oreaster linckii (Bl.).—T wo characteristic specimens. 
Oreaster mammillatus (Aud.).—The series of sixteen speci- 
mens shows considerable variation in the details of 
the tuberculation. One specimen is almost exactly 
like the type of O. affinis, M. & T. (figured by Koehler, 
1910), and I have no doubt that affinis is a synonym 
of mammillatus. 
Culcita schmideliana (Retz.)—Two specimens ; neither is 
perfectly typical, but there is little doubt of the 
identity. 
Linckia levigata (L.).—Two specimens. 
Echinaster eridanella, M. & T.—Ten specimens, with 
five rays each. The absence of six- and seven-rayed 
specimens suggests that this is a selected series. 
Metrodira subulata, Gray.—Five specimens ; at least two 
have shorter and stouter rays than usual. 
Ophioplocus imbricatus (M. & T.).—One specimen. 
Ophiarachnella marmorata (Lyman).—Seven specimens, 
12-19 mm. across the disc. I believe that this species 
must be maintained as distinct from gorgonia, 
although it may be only a variety of the latter. 
Ophiolepis superba, nom. nov. (= Ophiura annulosa, Bl. 
non Lamarck).—One remarkable specimen, 22 mm. 
across the disc, uniformly deep buff, with no dark 
markings. It is curious that it has not previously 
been noted that de Blainville’s name annulosa was 
preoccupied and is hence untenable. Both Ophiura 
annulosa, Lamarck, and O. annulosa, de Blainville, 
have been in constant use for many years, each being 
a conspicuous and well-known East Indian species. 
