[CEYLON PEARL OYSTER FISHERIES 1903 SUPPLEMENTARY REPORTS, No. V.] 



REPORT 



ON THE 



HOLOTHURIOIDEA 



COLLECTED BY 



Professor HERDMAN, at CEYLON, in 1902. 



BY- 

 JOSEPH PEARSON, B.Sa, 



SCHOLAR IN ZOOLOGY IN THE VICTORIA UNIVERSITY, AND NATURALIST TO THE 

 ULSTER FISHERIES AND BIOLOGY ASSOCIATION. 



[With PLATES I. to III.] 



The Holothcjrians obtained by Professor Herdman during his expedition to 

 Ceylon have proved to be a very interesting and extensive series. 



The collection consists of 70 specimens, which are distributed amongst 10 genera 

 and about 30 species. Of these I find that seven are new to science and there are 

 also at least two new varieties. One of the new species requires the formation of a 

 new genus, Havelockia, near to Colocldrus in the Dendrochirotse. 



In the main I have followed the classification and nomenclature adopted by 

 Ludwig (12).* I have, however, taken Jeffrey Bell's (16, 17) suggestion with 

 regard to the generic name Actinopyga. 



The following is a list of the species in the collection : 



Synapta striata, Sluiter. Thyone sacellus (Selenka). 



Synapta beselii, Jager. Thyone (?) fusca, n. sp. 



Synapta, sp. (?). Thyone (?) hornelli, n. sp. 



Synapta, sp. (?). Thyone (?) calcarea, n. sp. 



Cucmnaria tricolor, Sluiter. Phyllophorus cebuensis (Semper). 



C. furbimta (Hutton). Actinocucumis donnani, n. sp. 



C. imbricata (Semper). Oolochirus quadrangularis, Lesson. 



C. conjwigens, Semper. Col. quadrangularis, var. mollis, nov. 



Thyone fusus, var. papaensi*, ThtSel, Col. doliolum (Pallas). 



* The numbers in brackets refer to the List of Literature on p. liOG. 



