VI. The Land and Fresh-Water Crustacea of the District 
around Edinburgh. Part IL—The Ostracoda and 
Copepoda. By Tuomas Scort, Esq., F.L.S., Cor. Mem. 
Glas. Geol. Soc. and Nat. Hist. Soc. of Glasgow. 
(Read 19th April 1893.) 
In a previous communication I gavea short account of the 
land and fresh-water Amphipoda and Isopoda of the Edinburgh 
district ; in this paper I propose to notice two of the groups 
of the Entomostraca, viz., the Ostracoda and Copepoda. I 
intended to have given an account of these groups during 
the previous session of the Royal Physical Society, but want 
of time compelled me, reluctantly, to delay doing so till a 
more convenient season. One of the chief difficulties in 
dealing with the larger or “ higher ” Crustacea is to find the 
specimens, but the chief difficulty with the micro-forms— 
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