Ceylon Maldives Malay Archipelago 
Cala nioiday. 54 NagOd gear sence O Sta anne eee 
Oithonidae:] te i | aoe eee ene Dee ee BU 2 
Il AicDACEIC@IGda, 17 3 3 
Oncaeidae. 3 4 B 
Conycacicdale iar mame? ie Aer iste 8 
Seoul’ 4 5 GO so oo G 4 
Lichomolgidae 4 
Clausiidae . i prweiligeg ym age enrays ea: Bey Sane 
Total 107 88 70 
This shews for instance, when compared with the numbers given for the ‘Siboga’ collection 
on page 3 that out of the 44 species of Harpacticoida recorded, 17 of them were present at 
Ceylon, 3 at the Maldives, and 3 had already been known from the Malay Archipelago. On 
the other hand, out of the 85 species recorded by Cievr, 15 of them were apparently not 
taken during the cruise of the ‘Siboga’, 
No excuse is offered for the great length of the report, or for the delay in its preparation, 
beyond the fact that, the chief object was to make it worthy of the energy of the party of 
Dutch Naturalists who devoted so much time to the investigation of the area, and of the 
commendable example of the Dutch Government in meeting the expenses of the exploration, 
along with due consideration for the fulfilment of my official duties under Professor Hrrpman. 
Many dissections had to be made in the course of the work. Each appendage was dissected in 
regular order and mounted separately in the majority of the species so it must be obvious that time 
was necessary to obtain useful preparations. The illustrations are so drawn, that the characteristic 
features of each species can readily be detected, without undue crowding of the plates. The 
plumose setae of the swimming feet and other appendages have, therefore, not been included 
in many cases. The lengthy index, list of literature, and the extensive synonymy under some 
of the species, are given with the view to facilitate the investigations of future workers. I] am 
deeply indebted to the Linnean Society, London, and to the Librarian, Mr. A. W. Kappet, for 
the free use of the literature in the library, and also to many investigators for furnishing 
reprints of their works on Copepoda. My father’s experience and advice proved of the utmost 
value in the difficult points that cropped up from time to time, and in the determination of 
uncertain species. I am also deeply indebted to Professor Weser for his kindness in giving me 
the opportunity of investigating this interesting collection of Copepoda, for his careful supervision 
of the printing of the report, and for the very satisfactory photographic reproductions of the 
plates from the original indian ink copies. 
lrmiGl, Barrow im Is urness, Ajsall ao, 10600, 
