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Proceedings of the Boyal Physical Society. 



of the Firth, by the German North Sea Expedition of 1872 

 (c/. Metzger's Eeport on the Crustacea). A few Ento- 

 mostraca from the coast between Dunbar and Cockburnspath 

 were recorded by Baird as early as 1835-1838,^ and some 

 attention was given to the Ostracoda — a subdivision thereof 

 — by Brady and Eobertson in the " sixties." Leslie and 

 Herd man did not attempt to treat of the Entomostraca, and 

 give in their Catalogue (1881) only the Malacostraca and 

 Cirripedia — a list of 96 species, to which Henderson (1884) 

 added 20. 



The great subclass Entomostraca — at any rate the Clado- 

 cera and Copepoda — were up to this time almost untouched, 

 and it is chiefly among these microscopic forms that Dr 

 Scott has laboured with such marked success. A valuable 

 paper on the fresh-water Crustacea (nearly all Entomostraca, 

 of course) of Midlothian, by Dr and Miss Sprague, was pub- 

 lished in the Transactions (vol. iv.) of the Edinhurgh Field 

 Naturalists' and Microscopical Society in 1901.^ The ter- 

 restrial Isopods are practically the only group to which I 

 have myself paid attention.^ Such of my records of these 

 and other Crustacea as are of any interest have been given 

 to Dr Scott. During the present year I have sent him 

 gatherings of Entomostraca from some localities in the area 

 which he had not himself visited, including Loch-a-Chroin 

 (2500 feet above sea-level), and a spring at nearly the same 

 elevation on Ben Ledi.* 



1 Trans. Berw. Nat. Club, i. p. 95; and Mag. Zool. and Bot., i. and ii. 

 (1837-38). In 1863 W. Turner and H. S. Wilson recorded Lerneopoda 

 (Charopinus) dalmanni (Retz.), from Skate caught by Newhaven fishermen 

 {Trans. Boy. Soc. Edin., xxiii. p. 77). 



^ An early record from Duddingston Loch is that of " Cypris reniformis, 

 Daudebart de Ferussac, fils," by Leach, in Edin. Encycl., vii., 1813, p. 388. 

 In D. Robertson's "Fresh and Brackish- water Ostracoda," Fauna of Scotland, 

 etc., Glasgow, 1880, there are a number of records from lochs about Edinburgh. 



^ See records of Platyarthrus hoffmanseggii, etc., in Ann. Scot. Nat. Hist., 

 1900, p. 186; 1901, p. 120; and 1906, p. 187. 



The following species, identified by Dr Scott, occurred in these two 

 gatherings, namely — (1) Loch-a-Chroin, 17th September 1906, Bosmina longi- 

 rostris (0. F. Miill.), Acroperus harpce, Baird, Alonopsis elongata, G. 0. Sars, 

 Alona qiiadrangularis {0. F. M.), Alonella excisa (Fisch), Chydorus sphoeri- 

 cus (0. F. M. ), Cyclocypris serena (Koch), Diaptomus gracilis, G. 0. Sars, 

 Cyclops viridis (J VLv.), 0. serrulatus, Fisch.; also Gammarus pulex (De G. ). 

 (2) Ben Ledi, 4th September, Chydorus sphcericus (0. F. M.), Erpeiocypris 

 tumefacta (B. and R.), Cypridopsis villosa (Jur.), Potamocypris fulva (Brady), 

 Candona Candida (0. F. M. ), Attheyella zschokTcei (Schm. ), A. cuspidata 

 (Schm.), Cyclops vernalis, Fisch. In peat-pools on Bavelaw Moss, 29th May 

 1908, I obtained Acantholeheris curvirostris (Miill.), Cyclops languidus, Sars, 

 and C. nanus, Sars, for each of which only one locality is given in Scott's 

 Catalogue : determined by Mr Scourfield. 



