366 CEYLON PEARL OYSTER REPORT. 



of the Zoological Society.' The valuable work on the Ostracoda collected by the 

 " Challenger" is indispensable in dealing with tropical forms. 'The Monographs on 

 the North Atlantic and North- Western European Ostracoda,' by Professor Brady and 

 Dr. Norman, are also of much service. The splendid work of Dr. G. W. Muller, 

 published by the Naples Zoological Station, is a mine of information, as the anatomical 

 details of the animals are fully illustrated, and the positions of many hitherto 

 incompletely described species are thus firmly established. Finally, every paper 

 dealing with marine Ostracoda from foreign localities requires to be consulted, and 

 this has been done as far as possible in the present case ; but it is not considered 

 necessary to give references under the species, or to add a list of the literature, as the 

 authors named and the papers made use of are well known to all workers at the 

 group. 



I am much indebted to Professor Brady, F.R.S., for looking over the identifications 

 made and for assistance given with some doubtful species. My father, Dr. T. Scott, 

 has also helped me greatly with the work of classifying the undescribed forms. 

 Owing to the absence of the appendages, the exact positions of one or two of the new 

 species, which happened to be only empty shells, are at present uncertain. 



It is almost impossible to find good descriptive names in certain genera of Ostracoda 

 which are not pre-occupied, and geographical terms are apt to prove misleading. So 

 I have named the new species of Cythere and Cytherella in honour of some of the 

 officials and naturalists connected with Ceylon and its pearl fisheries who were 

 mentioned in Professor Herdman's Introduction to these Reports. 



Section I. : MYODOCOPA. 

 Family: ASTEROPID^E. 



Asterope oculata, Brady. 



In washings from young pearl oysters collected from Cheval Paar, February and 

 March, 1902, and from Muttuvaratu Paar, November 19th, 1902; also in general 

 washings from invertebrates from Gulf of Manaar. Ten females and four males were 

 found altogether. Professor Brady records it from the surface at Trincomalee, and 

 from Cruz Bay. 



Asterope quadrata, Brady. 

 Three females were present in the washings from invertebrates dredged on the 

 pearl banks. This species was described from specimens collected at Lyttelton 

 Harbour, New Zealand. 



Asterope arthuri, Stebbing. 

 Specimens of this fine species were taken by the tow-net in 6 to 10 fathoms at 

 Karativo Paar on March 10th, 1902, and at 9 fathoms at 9 P.M. on Vankali Paar, 



