326 History of British Entomostraca. ' 
animal, and are sufficient,, he considers, to constitute it into a dis- 
tinct species, named by him C. lacimdatus. At first observing them, 
Jurine says he was disposed to consider them also peculiar organs, 
and that it was a distinct species. After very attentive observation, 
however, he found the number to be irregular ; and sometimes he 
found them in males adhering to the base of the posterior feet ; he 
found them to separate spontaneously from the body of the animal, 
and, in short, discovered them to be nothing less than animalcules, the 
base upon which they were planted being a kind of moss, with which 
these insects are often covered. Jurine says that it is in the months 
of March and April that these insects are to be met with ; but the 
only time I ever saw a specimen with these peculiar bodies adher- 
ing was in the month of October. It was taken from Yetholm Loch, 
Roxburghshire ; but an accident occurring to the vessel in which 
they were placed, prevented me from any lengthened observations 
upon them. I have not met with the C. caeruleus of Muller ; but 
Jurine distinctly asserts, that the three species of Muller, caeruleus, 
rubens, and lacinulatus, are mere varieties of one species; and 
which, from the resemblance he fancied he saw in the tail of the fe- 
male, when loaded with eggs, to that of the beaver, he has named 
Monoc. Castor. It is a very beautiful species, and is the most ele- 
gant of all we know. " Son port," says Jurine, " est elegant; sa 
maniere de s'elancer dans la liquide est noble et hardie ; ses mouve- 
mens sont libres et faciles ; tout enfin annonce chez J.ui une supe- 
riorite qui characterize la grandeur de 1'espece a laquelle il appar- 
tient." 
3. Cyclops minutus, Plate IX, Fig. 1-14. Specific Character Antennis cur- 
tis ; corpore linear! ; cauda biloba ; lobo utroque setis duobus inaequalibus 
instructo ; ovario externo unico. 
Synonimes, fyc Canthocarpus Staphylinus, J. O. Westwood, Lardner's Cab. 
Cycl. (ined.) 
Cyclops staphylinus, Desmarest, Consid. gen. sur les Crustaces, p. 368. 
Monoculus staphylinus, Jurine, pp. 74-84, pi. 7, fig. 1-19. 1820. 
Cyclops minutus, Ramdohr, pp. 10-13, tab. iii., fig. 1-9. 1805. 
Monoculus minutus, Fabricius, Tom. ii. p. 499, No. 45. 1 792 ? 
Cyclops minutus, Mutter, p. 101, tab. xvii. fig. 1-7. 
Amymone (young state,) Muller, p. 42, tab. ii. 1785. 
Eichhorn, Beytrage zur Naturg. der Kleinsten Wasserthiere, p. 53, tab. v. fig. 
K, L. 1781. Very bad figures. 
Do. do. (young state,) p. 41, tab. iii. fig. p. 
Satyr, Baker, Employ, for Micros, (the young state,) p. 314, pi. 12, fig. 23 y 
25, 26. 1764. 
Philosophical Transactions, No. 288, for November and December, 1703. 
Habitat. Pools and ditches. Common all the year routfd- 
