362 EXPLANATION OF PLATES. 



Tab. XXIX. 



Fig. 1 . CetocJiilus septentrionalis. 



a. Styliform appendages in front of cephalo-thoracic segment, 

 which take the place of the sharp-pointed beak of iinomalocera. 

 h. Mandible and palpus, c. Antennule. d. First pair of 

 foot-jaws. e. Second do. f. Third do. g. First pair of 

 thoracic feet. 



2, 3. Ajyadicus chelifer, male and female. 



3 a. Antenna, b. Antennule. c. Mandible, d. Fifth pair of feet. 

 e. Posterior foot-jaws. /. Fu'st pair of thoracic feet. g. Se- 

 cond pair do. 



Tab. XXX. 



Figs. 1,2. Alteutha depressa, male and female. 



a. First pair of thoracic feet. h. Abdominal appendage. 



3. Canthocamptiis mhiufus, to show the club-shaped 

 organ attached to the abdomen. 



4, 5, 6. Canthocamptusfwrcatus. 



J: a. Ovar}'. 



5 a. Antennide. h. Last pair of feet. 



These figures are copied from drawings made by Mr. Salter. 



1 , 8. NoiocMpjhys ascicUcoIa. 



7 «. Antennule (?). b. Mandible, e. First pair of foot-jaws. r/. Se- 

 cond do. e. Third do. / Fourth do. g. One of the natatory 

 feet. 



Tab. XXXI. 



Fig. 1. Argulm foliaceus. 



2. View of part of the carapace, to show the ramifi- 



cation of opaque tubes or intestines. 



a. Antenna, b. First pair of foot-jaws. d. Sheath containing 

 the siphonal tube. c. Extremity of siphon, with its sharp- 

 pointed style. e,f. Second pair of foot-jaws, or suc/rers. 

 (j. Third pair of foot-jaws, or prehensile feet. //, i. First pair 

 of natatory legs, k, I. Fourth pair of do. 



