1230 



CRUSTACEA. 



segment is subcylindrical, a little the largest near the base. The caudal 

 setae are sometimes as long as the abdomen. This is the case in one 

 of the figures, the bluish one, a female, while in the reddish one they 

 are somewhat shorter. The anterior antenna have five joints, with 

 the last distinctly tri articulate. Some of the setae are nearly as long 

 as the abdomen. There are four pairs of natatories, which are nearly 

 equal, the anterior shortest. 



In some specimens there were two bags of eggs attached to the 

 abdomen. They were oval, and lay a little over the abdomen, 

 attached to its upper and outer side near the base of the second joint. 

 Their colour was a pale shade of bluish purple, like that of the animal. 

 The abdomen of the same individual was yellowish. 



Antakia obtusa. 



Pedes antici parvuli, antennis posticis paululo majores. Abdomen sensim 

 attenuatum, apice obsolete^ 3-articulatum. Styli caudales dimidh 

 abdominis paulo breviores, setis longiores. 



Anterior feet small, slightly larger than the posterior antennae, claw 

 about as long as preceding joint. Abdomen gradually smaller 

 towards apex, long ovate, with three obsolete articulations near 

 apex. Caudal stylets a little shorter than half the abdomen, setae 

 longer, external setae very short. 



Plate 86, fig. 13 a, animal, enlarged; b, lateral view of body ; c, 

 posterior antennae; d d', anterior feet, the claw in the former open. 



Sooloo Sea, southwest of Panay, January 29, 1842. 



Length, one-twentieth of an inch. Colour, red, in blotches ; other 

 parts nearly colourless. 



The abdomen is five- or six-jointed, counting the imperfect articula- 

 tions near apex. The whole except the first or basal joint, constitutes 

 in appearance a single oblong segment. The longest caudal seta is half 

 as long as the abdomen and stylets together, the one inside of this is 

 a third shorter, and the one next outside of it is one-fourth less ; the 

 two external are very short, but little exceeding the diameter of the 



