CALIGOIDEA. 



1335 



forward towards the curved spine, and subdivides into four branches 

 before reaching it, which are distributed to the neighbouring tegu- 

 ments ; the other branch extends backward to the epimeral articu- 

 lation, just below the articulating processes, where it passes to the 

 epimeral segment; it then branches, and is distributed to the various 

 parts of the inferior portion of this segment. 



The fifth pair (h) arise from the lateral margin of the ganglion, 

 some distance behind the preceding. They give off a slender branch 

 near their origin, and pass along with the branch to the first pair of 

 feet. 



The sixth pair (i) arise near the preceding, and are large nerves. 

 They divide immediately, and then subdivide into several branches, 

 which are distributed to the second pair of feet, and their muscles. 



The seventh pair (k) originate near the last, soon divide into two 

 branches, which pass to the muscles of the same legs. They are 

 slender nerves. 



The remaining nerves pertain to the natatory legs, and the abdo- 

 minal portions of the body. 



The outer pair (1) belong to the anterior natatories. They con- 

 tinue parallel with the central cord till they reach the furcate process 

 on the venter ; they then curve outward, exterior to the ventral mus- 

 cles, and give off three branches in succession from the outer side to 

 the muscles of the first natatory. Before entering the basal joints of 

 these legs, they divide into three portions, which enter together; the 

 inner branch is quite slender, and passes to the posterior moveable 

 seta, and the jointed appendage; the middle is distributed to the 

 muscles of the basal joint ; the outer branch gives a slender nerve to 

 the apex of the basal joint, and then passes to the two following 

 joints, dividing as it enters them. We refer for minuter details to 

 figure 1 q. 



This pair of nerves give off a slender branch near their origin (r, 

 fig. s), which passes to the attachments of the stomach. 



The next pair of nerves (m) are distributed to the second pair of 

 natatories. They diverge from the central cord — to which they are 

 adjacent — below the furcate process, and soon give off a branch inte- 

 riorly, which passes down the venter, and appears to be distributed to 

 the ventral muscles. As they approach the second pair of natatories, 

 they give off another branch from the same side, which also passes 



