

103 ^ CRUSTACEA. 



Figure 73 represents another kind, in which the setae belong to the 

 basaTjoint and are very stout, instead of being capillary. There are 

 two branches, one terminating in two rather short setae, and the other 

 in one very long naked seta. 



The parallelism between the parts of these organs and the man- 

 dibles or posterior antennae is apparent from the figures (which have 

 the joints numbered to correspond) without farther explanation. 



Second pair of maxillary feet or inaxillipeds.—Tke maxillipeds 

 are always simple, or have only a rudimentary second branch. 

 They vary in number of joints from one to five. One of the simple 

 uni-articulate forms is seen represented in figure 74 a.* It has an 

 uncinate apex,- which in a lateral view, is seen to be furcate; and, 

 besides, there are two obtuse setiform processes, which are short setu- 



lose. . . 



In figure 75 (Corycaeus), another variety, there are two joints, and 

 the termination has much similarity to the preceding. Of the two 

 setiform processes, one is closely ciliate, and the other has a short 

 scopiform extremity. 



In figure 76, there are the same elements, but with three joints, 

 the uncinate termination constituting a separate joint. There are 

 three setiform processes on the inner side, which are furcate and short 

 setulose. 



In figures 77, 78, there are three stout joints in the same line, the 

 last not uncinately prolonged, and all furnished on the same side 

 with long, setulose, simple setae; the setae are acute, and those of the 

 first of the three joints are the shortest. 



In figure 79, the organ has four joints and is geniculate between 

 the first and second. It resembles both figures 76 and 77, but it has 

 not the uncinate extremity of the former, and is not straight like the 

 latter. The joints are famished with long setulose setae. 



In figures 80 and 81, there is much resemblance to 79, but the long 

 setae are naked instead of being setulose. 



It is plain here that there is but one type for the whole, and a 

 comparison of figures 76 or 77 with figures 66 or 69, will exhibit a 

 general correspondence with the maxillae; and by a glance at figures 



* From a Sapphirina; figure 74 h is the same, in a different position ; 75, a, b, Cory- 

 cams; 76, Harpacticus; 77, Pontella; 78, Euehaeta ; 79, Oithona; 80, 81, Candace. 



