CALIGOIDEA. J361 



rnento primo lato, subelliptico, angulis posticis rotundatis, segmentis 

 sequentibus dimidio angustioribus, non oblong is, subcequis, tertio posticd 

 truncate; lamellis caudalibus latis, paulo oblongis, contiguis, setis 

 lamelld brevioribus, fere wquis. Furcula simplex, tenuis, bad angus- 

 tissimo, brachiis diver gentibm. Pedes postici tenues, ramis valde 

 incequis, ramo breviore 2-articulato, altero %-articulato. 



Female: — Cephalothorax nearly round; second segment transverse, 

 posterior angles alate, wings broad, approximate, the margin around 

 arcuate. Abdomen three-jointed, anterior segment broad, subellip- 

 tical, posterior angles rounded, following segments half narrower, 

 not oblong, subequal, the last truncate behind; caudal lamellae 

 broad, oblong, contiguous, setaB shorter than the lamellae, nearly 

 equal. Furcula simple, slender, narrow at base, prongs divergent. 

 Posterior feet rather slender, branches very unequal, the shorter 

 two-jointed, the other three-jointed. 



Plate 94, fig. 8 a, dorsal view of animal, enlarged ; b, posterior an- 

 tennae ; c, maxillae, adjoining buccal trunk ; d, first pair of feet ; e, 

 second pair of feet; /, furcula (the preceding, from b to /, have the 

 same relative position as in the animal) ; g, posterior feet ; h, under 

 view of abdomen, showing appendages to abdomen. 



From the gills of an Albicore, in the Atlantic, May 7, 1842, latitude 

 11° south, longitude 14° west. 



The carapax is emarginate in front. The second pair of feet have 

 the finger nearly as long as the hand. The furcula is very narrow at 

 base. The alate appendages to second segment of the body are rather 

 larger in surface than the segment. They are placed obliquely, being in 

 contact at the centre of the posterior side of the segment. The caudal 

 lamellae are as long as the last abdominal segment, and resemble much 

 those of the Sapphirinae. There are four setae on the terminal margin 

 shorter than the lamellae, three of which are in contact towards the 

 inner angle, and the fourth is a little separate, and situated at the 

 outer angle. 



The singular appendages to the first abdominal segment, represented 

 in figure 8 h, resemble what we have elsewhere described (page 1347). 



341 





