NESJLA. 
247 
Coast of Devon. This and the following species swim 
with great swiftness and elegance, and can execute rapid 
and varied evolutions. 
Cymodocea rubra, Leach. — Of a red colour ; body some- 
what linear, fissure of last joint equal in breadth through- 
out, sixth segment without prolongation. 
Coast of Devon. Curnbrae, Firth of Clyde (Eev. Alfred 
Norman). 
Cymodocea viridis, Leach. — Of a green colour; body 
nearly oval ; fissure of last segment of abdomen very wide 
at the base. 
Coast of Devon. 
Gen. 126 . NES.EA, Leach. 
Last segment of the tail (last false legs) on each side with 
a straight, slightly compressed appendage. Body six- 
jointed; last joint larger than the rest. Antennae seta- 
ceous, nearly equal, upper with a very large peduncle, two- 
jointed, basal joint the larger. 
Nesjsa bidentata, Adams. Adams's Sea Till-hall. 
(Plate XIY. fig. 1 .) — Body smooth, sixth ring terminated 
behind by two sharp points; abdomen with its last ring 
