284 AMrniroTiA nohmalia. 



13. CLYDONIA. 



Clydonia, Dana, U. S. Erplar. Expvd. p. 834. 

 " Body elongate, somewhat depressed. Pleon six- to scvcn-articiilatc. 

 Eyes small. The two antenna? long-styliform, straight, consisting 

 of a short basal joint and a long, rigid, subulate extremity, ob- 

 solctely multiarticxilate. Feet slender ; six posterior long, fili- 

 form ; fifth longest." — Dana. 



The author does not state which pair of antennoe are absent. The 

 superior pair are probably rudimentary. 



1. Clydonia gracilis. (Plate XLVII. fig. 8.) 

 Clydonia gracilis, Dana, U. S. Explor. Exped. p. 834. pi. 55. f. 6. 



" Two antennae about as long as the body, subulate. Eyes sraaU, 

 with nine lenses. Three posterior pairs of pleopoda terminating 

 with slender rami ; the antepenultimate and ultimate pairs longer 

 than the penultimate, having a short acute branch [spine ?] near 

 the middle. Third pair of pereiopoda as long as the body ; bases 

 very long, minutely spinulose below : fifth pair less than half the 

 length of the thii'd. 



" Length 3 lines. 



" Hah. Atlantic Ocean, latitude 1° N., longitude 18° W. Collected 

 October 31, 1838."— i^fma. 



2. Clydonia longipes. (Plate XLYII. fig. 9.) 

 Cl3'donia longipes, Dana, U. S. Explor. Exped. p. 835. pi. 55. f. 7. 



" Similar to C. gracUis. The antennae nearly as long as the body, a 

 little stouter than in C. gracilis, obsoletely multiarticulate. Fifth 

 pair of pereiopoda more than half the length of the third. Two 

 anterior segments of the pleon with the posterior angles acute, and 

 not truncate. 



" Length 4 to 5 lines. 



'^ Hah. Pacific Ocean, latitude 18° 10' S., longitude 126° W. Col- 

 lected August 8, 1839." — Dana. 



14. ICILIUS. 



Icilius, Dana, U. S. Explor. Exp)ed. p. 844. 

 " Body much compressed. Antennae elongate, and having long fla- 

 gella ; the inferior pair longest. Gnathopoda not prehensile, vergi- 

 form and unguicidate. Posterior pairs of pleopoda furcate." — 

 Dana. 



