CYCLOPOIDEA. 1213 



cavity, the position of prominent muscles, and the ovaries, besides the 

 eyes ; b, same, dorsal view ; c, posterior antennae ; d, one of the max- 

 illae and one anterior foot, drawing not completed. 



China Sea, three hundred miles northeast of Singapore, latitude 5° 

 north, longitude 107° east, February 17, 1842. 



Length, one-tenth of an inch. Nearly colourless; brownish red 

 about the mouth and along the venter. 



The antepenult joint of the anterior antennae is larger than the 

 others, and the setae are rather more than half the length of the 

 antennae. The setae of the second joint of the posterior antennae is as 

 long as this joint. The next joint is less than one-third the following. 

 The last segment of the cephalothorax has not the posterior angles at 

 all prominent. 



The abdomen in its elliptical part contained a pair of oblong sacs, 

 as shown in the figure, which connected with a pair extending ob- 

 liquely upward and forward in the cephalothorax, nearly to the 

 middle of the back. 



Within the cephalothorax along the back, there were appearances 

 indicating traces of obsolete divisions, which if perfect would 

 divide the large anterior segment into seven segments, corresponding 

 (counting from the posterior part) to 



1 pair of natatories. 



1 pair of prehensile feet or maxillipeds. 



2 pairs of maxillae. 

 1 pair of mandibles. 



1 pair of antennae — the posterior. 

 1 pair of antennae — the anterior. 



The stomach is very large ovoid, and from the under side it con- 

 nects with an oblong oesophagus, which diminishes a little to the mouth. 

 The stomach occupies the greater part of the anterior segment, and 

 becomes gradually smaller as it passes to the following segments. 



The caudal setae are about one-fourth as long as the stylets. 



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