1146 CRUSTACEA. 



young individual. The caudal stylets are more than half the length 

 of the abdomen; the setae were mostly broken off; the inner one 

 was entire, and was about as long as the abdomen. The first 

 three joints of the anterior antennae are longest and nearly equal, and 

 the fourth and fifth together about equal the third ; the next four are 

 subequal and each is a little longer than the fifth. The setae hardly 

 exceed the diameter of the joints, except one at the apex, which is 

 shorter than the joint. The superior eyes are distant. The pigment 

 of the inferior pair is seen in a vertical view just behind the superior 

 eyes, and is reniform in shape. The posterior antennae have the smaller 

 branch one-fourth shorter than the longer ; the longer has the second 

 joint one-fourth shorter than the first ; the setae are scarcely longer 

 than the branches. Posterior feet very short. 



PONTELLINA EXIGUA. 



Gracilis. Frons obtusits. Cephdlothorax Q-articulatus, capite discrete, 

 segmento postico brevi, obtuso. Oculi inferiores maximi, valde elon- 

 gati, subclavati. Antennae anticce corpore valde breviores, 120° (?) 

 divaricate, setis perbrevibus, apicali anticd longiore, subapicalibm 

 brevibus. Antennm posticai tenues, ramo majore plus duplo lo?igiore. 

 Styli caudales oblongi. [An adultum ? Abdomen 2-articulatum.'] 



Slender. Front obtuse. Cephalothorax six-jointed, head separate, 

 posterior segments four, the last short, obtuse behind. Inferior eyes 

 large, much elongate, the pigment subclavate. Anterior antennae 

 three-fourths as long as the body, 120° (?) divaricate, setae very 

 short, the anterior apical setae longest, the subapical not longer than 

 the joint. Branches of the posterior antennae slender and very un- 

 equal, the smaller half the larger in length ; the setae of the longer 

 branch exceeding the branch in length. Caudal stylets oblong, 

 setae subequal. [Abdomen short, two-jointed, second segment the 

 longer. Adult ?] 



Plate 80, &g. 9 a, animal, enlarged, the antennae removed ; b, pro- 

 file, showing outline of head. 



Abundant in the Atlantic, October 16, 1838, latitude 7h° north, 



