644 Bett—On the Echinoderm Fauna of the Island of Ceylon. 
This collection contained sixteen species, ten or eleven* of which were not found 
by Dr. Ondaatje. 
Adding to these the species enumerated by earlier writers and by myself, 
the total number came to the sum of thirty-two species. 
On returning to Ceylon, in 1883, Dr. Ondaatje set zealously to work, and 
especially did he direct his attention to the two groups of Echinoderms, as to 
which we still remained in almost complete ignorance—the Holothurians and the 
Crinoids. From time to time consignments have reached me of specimens of 
these two orders, which have most welcomely been, in very many cases, accom- 
panied by coloured drawings made during life of these creatures, which, when 
preserved for some time in alcohol, lose both their original colouration and their 
ordinary form. 
It is with the object of making public some of the admirable representations 
prepared under Dr. Ondaatje’s direction that I offer the list, and the remarks that 
follow, for the consideration of the Society. Coloured drawings such as these 
awaken an interest in Natural History of a kind which is often keener than that 
produced by anatomical sketches. | 
By adding to the species collected by the naturalists just mentioned those 
found by Mr. E. W. H. Holdsworth, and others, I am able now to give a list of 
more than fifty species of Echinoderms known from Ceylon. 
I have refrained from burdening the text with lengthy references to the 
literature, but I have given enough to enable the student to extend his researches, 
and I have in the case of all the groups of Echinoderms made a reference to a 
work in which the full synonyms will be found cited; Professor Perrier,t Mr. 
Lyman,§ Mr. Alexander Agassiz,|| and Drs. Lampert€] and Théel** being the 
authors so quoted. 
* There is a species of Linckia which Dr. Walter thinks may be identical with Scytaster nove-cale- 
donie, which was collected by Dr. Ondaatje. Dr. Walter promised to me his kind offices to get me 
one of the specimens from Jena, but it has never reached me. 
+ Ceylon Kehinodermen. Jenaische Zeitschrift, xviii., pp. 865-384. 
{ Revision de la Collection de Stellérides du Muséum d'histoire naturelle de Paris. Paris, 1875 
(also in Archives de Zoologie expérimentale, vol. v.) 
§ Report of the Ophiuroidea, dredged by H. M. 8. Challenger, 1882. 
|| Agassiz, Alex. Revision of the Echini. Cambridge [U.S.A.], 1872-74. 
‘| Lampert K—Die Seewalzen—Holothurioidea. In Reisenim Archipel der Philippinen, IL., iv. 3. 
Wiesbaden, 1885. 
** Report on the Holothurioidea dredged by H. M. S. Challenger, Part 2, 1886. 
