NO. 1404. 



PA RA SJTJC COPE PODS— CALIGIDM- WILSON. 



501 



fig. 10). These rods arc inclined toward each other as they proceed 

 away from tin 1 ventral surface; their proximal ends are bent sharply 

 and sometimes carried a short distance along the ventral surface of the 

 carapace as in Caligus owtus. They are articulated at the bend thus 

 made and again near the tip, making- them three jointed. At the basal 

 joint they arc also articulated with the ventral surface of the carapace, 

 and the muscles which elevate or lower the whole mass are fastened 

 here. 



The short terminal joints curve inward and nearly meet at the mid 

 line {Caligus honito, Lepeophtheirus ed/wardsi). Sometimes they are 

 reenforced here at the tip by other small rods which run in toward the 



Pig. 7.— Second a.vtknn.k. piest ami second maxill.e and mouth tube of adult Caligus rapax, 

 highly magnified to show exact position, relations, and structure, an"., second an- 

 ti'.nn !'.; !•'.. exopod of first mami.i.k; <•"., endopod of second maxill.e; hi., mouth; mx'., 



FIB81 HAXIL1 I mx".. SECOND MAXII.I..K. 



mill line parallel with the first {Caligus curtus). The lower lip is 

 stretched over this framework from side to side and projects somewhat 

 in front of the small anterior rods. It is divided at the center, and 

 the edges thus formed are fringed with a tuft of hairs fully twice the 

 length of those which fringe the rest of the mouth opening (fig. 6). 

 In Alebion there i> a slit at either side instead of a single slit at the 

 center, and the fringe is not much lengthened. 



In the membrane of the lower lip. between the marginal rods just 

 described, lies a complicated jointed framework of short rods which 

 help support the membrane. Their number, arrangement, and shape 



