58 BRITISH COPEPODA. 



depending from the vulva like a bunch of candles. 

 Length -jVth of an inch (1'5 mm.). When alive the 

 animal is of a pale brown colour, but on immersion in 

 spirit assumes a peculiar vinous red or purple. 



Temora velox is an inhabitant, almost exclusively, of 

 the brackish water of estuaries and salt marshes, and 

 in such localities I have taken it pretty extensively. 

 I have only once met with it in the sea, amongst 

 Laminarice at Sunderland, and then only one or two 

 specimens were taken. The other localities in which 

 I have found it are, at Hylton on the Wear, Hartle- 

 pool, Alnmouth, Burgh Marsh near Carlisle, Cumbrae, 

 Pensarn (Merionethshire), Oulton Broad and Lake 

 Lothing (Suffolk), Whittlesea Dyke (Cambridgeshire), 

 and in pools near the river Stour at Manningtree. In 

 such situations it often occurs in immense profusion, 

 especially in autumn, when the water has become 

 heated by the direct rays of the sun. 



Genus 7. DIAPTOMUS, Westwood (1836). 



(Cyclops (in part), Miiller. Cyclopsina, Milne Edwards, 1840.) 



Body elongated, compressed; head distinct from the 

 thorax, anterior antennae 25 -jointed, that of the male 

 on the right side hinged. Posterior antennae and 

 organs of mastication as in Calanus. Inner branches 

 of all the swimming feet three-jointed except the first, 

 which has only two joints. Fifth foot consisting of 

 two branches, prehensile in both sexes, the internal 



