258 Prize Collection of Fresh-water Crustacea. [Sess. 
Ceriodaphnia. 
41, C. reticulata, Jurine. 
Elf Loch, Sept. 15, 1900. Bright pink. Easily distinguished from 
the other species in our collection by the teeth on the under surface of 
the terminal claw. 
42, C. scitula, Herrick (?). 
High pond, Penicuik, Sept. 7, 1901. Uncommon. Distinguished 
from the foregoing by the absence of teeth on the terminal claw, and 
from C. quadrangula by its larger size, more strongly marked reticula- 
tion, the form of the antennules and of the post-abdomen. We found 
one male. It had a bluish shell. 
43, C. quadrangula, Miiller. 
Duddingston Loch, June 21, 1901. Uncommon. There are small 
dots, perhaps very short bristles, within the meshes of the reticula- 
tions. 
Scapholeberis. 
44, S. mucronata, Miiller. 
Ravelston Cottage Quarry, July 17, 1900. Uncommon, but found in 
large numbers where it occurs. : 
Simocephalus. 
45, S. vetulus, Miiller. 
Ravelston Cottage Quarry, June 13, 1900. Very common. Seems to 
thrive best where os water is not too clear. 
Daphnia. 
46, D. pulex, De Geer. 
Marl Pit, Davidson’s Mains, June 2, 1900. Very common. Seems 
to thrive best where the water is not too clear. 
47, D. lacustris, G. O. Sars. 
Hurley Cove, Penicuik, Dec. 1, 1900. Common. Met with in large 
sheets of clear water. 
48, D. galeata, G. O. Sars. 
Granton Quarry, Sept. 1, 1900. Uncommon. The young form is 
easily recognised by the helmet-shaped head; the mature form by its 
protuberant forehead. 
49, 50, D. hamata, Brady. 
Granton Quarry, Sept. 1, 1900. Rare. All our specimens are young, 
and have three or four teeth on the shoulder. 
Bosmina. 
51, 52, B. longirostris, Miiller. 
1900. Uncommon, but occurs in large numbers when it is found. 
Prefers clear water. 
Macrothrix. 
53, M. laticornis, Jurine. 
Pond in Queen’s Park, June 16, 1900. Rare. Found only one i 
specimen; this was in a mixed gathering taken from Duddingston, 
Dunsappie, and St Margaret’s lochs. Lasily recognised by the post- — 
abdomen and by the anterior antenne. 
Acantholeberis. 
54, A. curvirostris, Miiller. 
Marfield Loch, Sept. 21, 1901. Rare. We have found it in no 
other locality. 
Ilyocryptus. 
55, I. sordidus, Liévin. ; 
Elf Loch, Jan. 26, 1901. Uncommon. Easily recognised by its 
bright red colour. 
= 
u 
Ravelston Quarry, Aug. 2, 1900. Cobbinshaw Reservoir, June 22, & 
