BeLtt—On the Echinoderm Fauna of the Island of Ceylon. 655 
GEOGRAPHICAL RELATIONS OF THE EcHINODERM FAUNA OF CEYLON. 
As, in the Report of the Voyage of the Alert,* I have comparatively recently 
discussed the general aspects of the Echinoderm Fauna of the inter-tropical areas 
of the Indian and Pacific Oceans, it will be convenient here to limit oneself to the 
geographical relations of the Echinoderm Fauna of Ceylon. 
Of the 55 species now known to dwell on the shores of that island, 26 are 
inhabitants of what may be called the Great Ocean; they extend from the 
eastern shores of Africa, across the Indian Ocean, through Torres Straits, to the 
more northern parts of East Australia and to the scattered islands of the Pacific ; 
13 which were {known east of Singapore have now had their extension to the 
central part of the Indian Ocean demonstrated ; 2, on the other hand, have been 
reported from a more eastern locality than has yet been assigned them; 2 are 
known from the Atlantic, as well as from the Indian or Pacific Oceans; 7 are, so 
far as our knowledge at present extends, confined to the neighbourhood of Ceylon ; 
but it is remarkable that while in other faunal regions we have been accustomed 
to find the Crinoids exhibiting a much more restricted area of distribution than 
other Echinoderms, of the five certainly known Crinoids from Ceylon only one 
seems indigenous to that island. 
Nore A,—[46a. | 
Since this Paper was presented, J have recognised in a specimen from Ceylon, 
collected by Mr. Holdsworth, an example of Colochirus armatus, lately described 
by Dr. von Marenzeller (Verh. Zool. Bot. Ges. zu Wien, 1881, p. 182), 
* Report on the Zoological Collections made in the Indo-Pacific Ocean during the Voyage of 
H. M.S. Alert, 1881-82, 1884, (Echinodermata, By F, J. Bell.) 
