ENTOMOSTRACA OP THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 277 



two joints. These differences become more apparent wlien arranged in tabular form, 

 thus : — 



The small Harpactid, for which it has been necessary to institute the new generic 

 name, Pseudozosime, was obtained by washing some material dredged in Scotia Bay, 

 South Orkneys, in June 1903. Only one specimen — a female — was observed; it so 

 closely resembled Zosime, Boeck, that only after careful dissection could the differences 

 referred to be detected. 



In this account of the Copepoda from the Scotia collections, the general arrangement 

 followed is that outlined by G. 0. Sars in his Crustacea of Norway, vol. iv. p. 2. He 

 divides the Copepoda into seven sub-orders or tribes, viz. the Calanoida, Harpacticoida, 

 Cyclopoida, Notodelphyoida, Monstrilloida, Caligoida, and the Lernseoida. The first 

 three contain all the Copepoda recorded here except Dysgamus atlanticus, which belongs 

 to the Caligoida. Dr G. S. Brady's Report on the Challenger Ostracoda and other 

 papers on these organisms have been of much assistance in dealing with this group. 



As several of the species recorded here, particularly among the Harpacticoida, appear 

 to be undescribed, drawings of these have been prepared to show their distinguishing 

 features, and to illustrate the descriptive notes relating to them. A few other more or 

 less rare and interesting forms are also figured to show peculiarities of structure and 

 some of the characteristics by which they may be determined from others closely allied 

 to them. My son, Andrew Scott, A.L.S., has prepared a number of these drawings, 

 and I desire to express my indebtedness to him for these, as well as for assistance 

 in determining some of the more critical and troublesome species. 



I have also to express my thanks to the Executive Committee of the Carnegie Trust 

 for the Universities of Scotland for defraying the expenses of the plates. 



I have not considered it necessary to give a list of the authors whose works have 

 been consulted, but reference to the more important of them will be found throughout 

 the systematic part of the Report. 



(llOY. SOC. EDIN. TRANS., VOL. XLVllI., 523.) 



