M Y S I D E A. 



683 



were in continual motion. The antennae were four in number, shorter 

 than beak; the superior short and thick, the inferior slender and acute, 

 nearly as long as beak. 



Zoea rubella (young of an Erichthus ?) 



Rostrum longissimum, corpore fere longius, fere rectum, setulis supra, 

 spimdis infra omatum. Carapax pubescens, spind brevi latere et 

 longd dorso armatus. tegmentum caudate profundi bUobatum, lobis 

 divaricatis lamellatis, subovatis, obtusis, setis posticd ciliatis et apicem 

 &pind acutd. 



Beak very long, rather longer than the body, nearly straight, with 

 short hairs above and spinules below. Carapax pubescent, armed 

 with a short lateral spine and a long dorsal. Caudal segment deeply 

 two-lobed, lobes divaricate, lamellar, subovate, obtuse, set with setae 

 behind, and a spine at each apex. 



Plate 45, fig. 11a, caudal extremity ; b, outer antennse ; c, man- 

 dible; d, maxilliped; e, ciliate lobed plates seen just anterior to first 

 pair of legs, and supposed to be attached to their base ; /, first pair of 

 feet ; g, second feet ; h, third pair ; i, fourth pair ; k, one of four pos- 

 terior pairs ; I, liver. 



South Atlantic, latitude 24° 45' south, longitude 44° 20' west. Col- 

 lected, January 10, 1839. 



Length, one-sixth of an inch. Colour, in part reddish. The dorsal 

 spine, probably a large one, was broken off near the body in the speci- 

 men seen. The carapax had a ridge of short hairs along the back, 

 and also along the abdomen. Abdomen seven-jointed, one under the 

 carapax. Abdominal appendages below short, naked, one of the 

 lamellse minute. Last abdominal segment triangular, with a deep 

 triangular excavation separating the two lobes. Outer margin serru- 

 late, a rather stout spine at apex, and slender setae within*. Caudal 

 appendages nearly as long as segment ; consist of a short basal joint 

 and an oblong oval plate, which is furnished with long ciliae. Eyes 



