CIROLANA. 295 



middle, with several powerful acute teeth and an inner 

 movable lobe ; the palpiform appendage is long, three- 

 jointed, and bent over the base of the lower antennse. 



The pair of foot-jaws are moderately strong, composed 

 of six nearly equal-sized joints, deeply ciliated along 

 the inner edge ; the first pair of maxillae are triangular, 

 with the extremity narrowed, bearing an inner lobe of 

 the same length as the extremity of the organ. Tlie 

 second pair of maxillse are larger, stronger, and exarticu- 

 late, with the extremity curved and acute, furnished near 

 the base of the inner margin with a small movable 

 quadrate lobe, the inner margin itself armed with strong 

 bristles. The tail is not quite so broad as the body, with 

 the four basal segments of equal size, transverse, the 

 fifth as long as the preceding, but abbreviated on each 

 side, with the posterior margin straight, and not arched 

 as in the preceding segments. The last segment of the 

 tail forms a large triangular smooth plate, on the outer 

 anterior sides of which are affixed the lateral appen- 

 dages, of which the inner plate is the larger : they do not 

 extend beyond the extremity of the terminal segment. 



