250 PiocccJiiigs of the Rotful Irish Actulemy. 



4. The specimens collected aixjuud the Cape of Grood Hope and in the 

 possession of the Cape Museum. These were reported upon in the " Marine 

 Investigations in S. Africa." 



5. The collection made by Mr. J. Stanley Gardiner in the Maldive Seas 

 in 1900, and described in the " Fauna and Geography of the Maldive and 

 Laccadive Archipelagoes." 



6. The deep-sea collection, deposited in the Indian Museum, Calcutta, 

 made during the different cruises of the Eoyal Indian Marine Survey ship 

 " Investigator " in the Indian Ocean, and reported on in a Memoir published 

 by the trustees of the Indian Museum. 



7. The Littoral Collection made by the " Investigator," deposited and 

 published as above. Very few of these specimens, however, received specific 

 determination in that report, but they are fully dealt with in this memoir. 



8. The " Wood-Mason Collection," made by Mr. J. Wood-Mason in the 

 Indian Ocean. Some of these are described along with the Indian Museum 

 Littoral Collection ; but most of them were left over for incorporation in 

 this memoir, and are here identified and described for the first time. 



9. The collection made by " S. A. S. le Prince de Monaco," on the yacht 

 '■ Hirondelle," during 1900-1902. 



Tlie type-specimens of this collection are deposited in the Oceanographical 

 Museum at Monaco. 



10. The collection made by Mr. J. Stanley Gardiner in the Indian Ocean 

 around the Maldive Islands, and reported on in tlie Transactions of the 

 Linuean Society (1910). 



11. A partly undescribed collection made around the Cape of Good Hope 

 and in the possession of the C^pe Museum. 



12. S- - -•= collected at Naples by Professor Thomson, and handed to 

 me for i aion. These are dealt with in this memoir, and are 

 deposited in Aberdeen University. 



13. The "Mergui Collection," made by the writer in the waters around 

 the Mergui Archipelego, Burma, in 1897. Tliese are here described for the 

 first time ; and the type-specimens are deposited in the Natural History 

 Museum of Aberdeen University. 



I am pleased to ha%-e this opportunity of expressing my thanks to all 

 tliose who have so generously placed specimens at my disposal ; for only 

 through their kindness has it been possible to render this study in any way 

 complete. I am specially indebted to Professor F. Jeffrey Bell, of the British 

 Museum, for the facilities be provided me in examining the magnificent 

 collection in that institution ; to Dr. Bume, of the Eoyal College of Surgeons, 



