296 
Part III. — Ninth Annual Report 
Leptodorid^. 
Leptodora, Lilljeborg (1861). 
Leptodora hyalina, Lilljeborg. 
1874. Leptodora hyalina, "Weismann, Bau und Lebenser, von Leptodora 
liyalina. 
1884. Leptodora hyalina, Herrick, loc. cit., p. 123, pi. N, figs. 6, 7. 
This is a large species ; some of my specimens from Loch Leven measure 
nearly half an inch in length. Both branches of the antennae are four- 
jointed ; the body is elongated, not curved as in Bytliotrephes. It is con- 
sidered to be a somewhat rare species, but it was not very rare in Loch 
Leven. 
EXPLANATION TO PLATES. 
Plate V. 
Fig. 1. Monospilus tenuirostris, x 57 
Fig. 2. Smpholebris mucronata, head with spine, x 40 
Fig. 2a. „ ,, head without spine, x 40 
Fig. 2 b. „ intermediate form of spine, x 40 
Fig. 2c. „ „ post-abdomen, x 110 
Fig. 3. (1) Geriodapknia punctata^ x 56 
Fig. 3a. „ ,, post-abdomen, x 132 
Fig. 3b. „ „ part of carapace, highly magni- 
fied. 
Fig. 4. Daphnia jardiniy x 40 
Fig. 4a. ,, „ post-abdomen, x 50 
Plate VI. 
Fig. 5. Leydigia quadrangular is^ x 52 
Fig. 5a. „ „ antenna, x 150 
Fig. 5b. „ „ post-abdomen, x 87 
Fig. 6. Alonella nana, x 165 
Fig. 7. Candona amhigua, n. sp., seen from left side, x 65 
Fig. 7a. „ ,, seen from above. x 65 
Fig. 7b. „ „ antenna, x 165 
Fig. 7c. „ „ antennule, x 145 
Fig. 8. „ pubescenSf seen from right side (for com- 
parison), X 60 
Fig. 8a. „ „ seen from above (for compari- 
son), X 60 
