302 



ISOPODA. 



NORMALIA. 



Genus CONILERA. (Leach.} 



Generic character. Subcylindrical, pleon as wide as the ter- 

 minal segments of the pereion, four anterior pairs of legs 

 strong, three hind pairs slender; maxillipeds with the three 

 terminal joints broad and flat, outer pleopoda divided into two 

 nearly equal-sized joints. 



THE very short characters given by Leach of this genus, 

 and by Montagu of the only known species, having been 

 insufficient to afford any true idea of the relations of the 

 type, we are happy in being able to furnish detailed 

 figures of the chief external organs. 



The animal is nearly cylindrical in form, with the sides 

 of the body nearly parallel, the head semi-oval, deeply 

 immersed in the first large segment of the body, of 

 which the anterior lateral angles are considerably ad- 

 vanced ; the tail is composed of four nearly equal-sized, 

 short basal segments (the first more or less concealed 

 beneath the preceding), followed by the fifth, which is 

 contracted at the sides, whilst the sixth is elongate- 

 triangular. 



The upper antennae are short, with the basal joints 

 subcylindrical ; the second pair are about twice the length 

 of the preceding, separated at the base by a narrow 

 ridge ; the labrum is transverse, rounded at the anterior 

 angles. The mandibles are tridentate at the tips, with a 

 slender serrated inner movable lobe, and a three-jointed 

 palpiform appendage. The maxillipedes or foot-jaws are 



