TEMORA. 53 



are fringed with small spines or spine-like hairs. There 

 is, however, considerable variety in the conformation 

 of these organs. The fifth foot in the female (fig. 12) 

 is small, three-jointed, the basal joint stout and bear- 

 ing a single long seta, the next very small, and the 

 terminal joint forming a long and slender curved claw. 

 Abdomen very short, the first segment, in the female, 

 being much the largest ; caudal segments also short, 

 about twice as long as broad : tail-setas rather longer 

 than the abdomen. Length ^ O ih of an inch (1'3 

 mm.). Colour yellowish, whitish, or pellucid. Dias 

 longiremis is found abundantly in the open sea and 

 between tide marks all round the British islands ; it 

 occurs sometimes also in brackish water, but in that 

 case is usually small and poorly developed. 



Genus 6. TEMOEA, Ba/ird (1850). 



(Cyclops (in part), Miiller. Calanus (in part), Leacli (fide Boeck), not 

 Monoculus, Gunner.) 



Body elongated ; head distinct from the thoracic 

 segments; rostrum bifurcate. Fourth and fifth thoracic 

 segments either completely coalescent or their separa- 

 tion merely indicated by a furrow. Abdomen com- 

 posed of four segments in the male, of three in 

 the female. Anterior antennge twenty-four- or 

 twenty-five-jointed ; that of the right side in the 

 male having a hinge-joint and forming a prehensile 

 organ. Mouth organs as in Calanus. Inner 



