CYCLOPOIDEA. JQ93 



perbrevibus, una uncinatd, posticd antepenultimd longiusculd, penul- 

 timis anticd posticdque paulo brevioribus, hdc ad extremitatem unci- 

 nulatd. Abdomen h-ariiculatum. Styli caudales breves, setd secundd 

 ceteris duplo longiore. 



Front obtuse. Cephalothorax four-jointed, rounded behind. Ante- 

 rior antennae as long as the body, at eighth joint slightly flexed, 

 tips much behind line of beak ; setae short, a rather long bent one 

 from the third joint, apical setae very short, one uncinate, posterior 

 antepenult as long as last three joints, posterior and anterior 

 penult one-third shorter, nearly equal, the posterior curved at apex, 

 anterior antepenult very short. Abdomen five-jointed. Caudal 

 stylets short, second seta more than twice the length of the first, 

 the others of moderate length. 



J o l 



Plate 77, fig. 8 a, animal, enlarged; 8 b, extremity of antenna; c, 

 right genital foot; d, profile of cephalothorax, showing alimentary 

 cavity and spermatic gland, with the appearance of the beak. 



Collected in the Straits of Banca, east of Sumatra, March 1, 1842; 

 also, in the Atlantic, May 9, 1842, latitude 9° south, longitude 17° 

 30' west; also, May 13, latitude 4° 30' south, longitude 25° west. 



Length, one-twelfth of an inch. Nearly colourless, a little reddish 

 in some parts. 



The body narrows a little anteriorly. The basal joint of the anterior 

 antennae is about twice as long as broad, and it is followed by seven 

 short joints, after which these organs are flexed slightly backward. 

 The apical joint is articulated with the preceding under its apex, or 

 obliquely, and it is rather shorter than the penult. The posterior 

 seta, directed straight backward, is not longer than the joint; there is 

 a small uncinate seta directed outward, and quite a short one directed 

 forward, a short distance back from the apex. The longish bent seta 

 proceeding from the third joint is as long as the first six joints of the 

 antenna ; this seta has motion in different directions. There is a seta 

 a little longer than the others near by, at the flexion of the antenna. 

 The caudal setae are all plumose. The right of the genital or poste- 

 rior thoracic feet, is large and doubly geniculate, consisting of a large 

 oblong basal joint; a second slender, a little curving and rather longer 



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