142 Proceedings of the Royal Physical Soctety. 
occurrence in the Borough Loch. The following are the 
Mollusca and Ostracoda observed in the material examined 
by us from this locality :— 
MOLLUSCA. 
Pisidium nitidum, Jenyns. Frequent. 
i pusillum (Gmelin). Frequent. 
Planorbis nautileus (Linné). Scarce. 
Valvata cristata, Miller. Common. 
»  piscinalis (Miller). Common. 
Limneea peregra (Miller). Very common. 
Several variations in form occurred in the last two species, 
and especially in the Lamnwa. 
OSTRACODA. 
Cypria serena (Koch). Frequent. 
Erpetocypris reptans (Baird). Rare. 
Candona candida (Miller). Frequent. 
a lactea, Baird. Rare. 
Darwinula stevensoni, Brady and Robertson. Frequent. 
HoLyroop LAKE. 
Though Molluscan remains were fairly abundant in this 
old lake deposit, only five species have been identified by 
us, and these are common freshwater species. Ostracoda on 
the other hand were numerous, both in individuals and 
species. No fewer than twelve species belonging to nine 
genera have been observed, and one species, viz., Limnicythere 
sancti-patricit, is now recorded for the first time as fossil in 
Scotland. The following are the species of Mollusca and 
Ostracoda observed by us. 
Nore.—In a paper read at a meeting of the Edinburgh 
Field Naturalists and Microscopical Society, in February 
1888, by Messrs J. A. Johnston and J. Lindsay, on “ An 
Ancient Lake Deposit in Queen’s Park” (here called Holyrood 
Lake), two species of Mollusca, not found by us—viz., Val- 
vata cristata, and Planorbis nitidus,—are recorded as having 
been observed in the material forming this deposit.* 
1 See Trans. Edin. Field Natur. and Micro. Soc., vol. ii., p. 138 (Part 2). 
