12 56 CRUSTACEA. 



culo longiusculo (dimidium digiti longitudine fere cequante). Lamellce 

 caudales latce, latitudine breviores, apice interno producto et acuto, 

 setis quatuor, brevissimis. Maris: — Corpus ovaium, lO-articulatum, 

 segmento antico transverso, semicirculari, aliis longitudine subcequis, 

 quatuor penultirnis ad latera minute acutis. Conspicilla remotiuscula, 

 fronte insita. 



Finger of posterior antennae slender, hardly longer than second joint, 

 claw rather long, half as long as finger. Caudal lamellae broad, 

 shorter than breadth, inner apex produced and acute, setae four, 

 very short. Male: — Body ovate, scarcely twice as long as broad, 

 ten-jointed, last segment concealed, first segment semicircular trans- 

 verse, the sides from thence straight, the segments subequal in 

 length, with the posterior angles rounded ; the abdominal segments 

 also rounded, but having at the middle either side a minute acute 

 prominence. Conspicilla on the front, a little remote. 



Plate 88, fig. 5 a, animal, enlarged; b, posterior antenna; c, internal 

 lenses and intermediate eyes, in relative position. 



Off Rio Janeiro, latitude 24° south, longitude 43° west, January 9, 

 1839. 



Length, one-tenth of an inch. Colours, like the preceding. 



Resembles the preceding, but has the sides posterior to the first 

 segment an even straight line, not curved, and the acute point on the 

 abdominal segments is situated near the middle of the sides, which are 

 rounded behind. The caudal lamellae are shorter in proportion ; the 

 claw of the posterior antennae longer, being more than half the length 

 of the preceding joint. 



Sapphirina tenella. 



Digitus antennarum posticarum tenuis, articulo 2do longior, wiguicido 

 parvulo. Lamellce caudales latitudine duplo longior es, setis dimidio 

 lamello3 valde brevioribus, una ad apieem internum fere obsoletd. Fe* 

 minae: — Gephalotliorax ovatus, b-articulatus, articulatione prima fere 

 obsoletd, segmento antico non transversa, posticis inter sese similibus, an- 



