

^Q^g CRUSTACEA. 



as the body, tips a little behind line of beak, setaB very short, two 

 posterior subapical quite long and nearly equal, anterior penult 

 nearly half as long, apical very short. Caudal stylets very small, 

 not oblong; setse of moderate length, the second about twice the 

 first in length. 



Plate 73, fig. 8 a, animal, enlarged ; b, abdomen of another indi- 

 vidual ; c, extremity of antenna of another individual. 



Taken March 3, 1842, southeast of Sumatra. 



Length one-twelfth of an inch. Nearly colourless. The setae of 

 the antenna are all short except the subapical. The inner setae of the 

 caudal stylets are a little curved at the tips ; the second seta is some- 

 what arcuated. Abdomen four-jointed, first joint longest, last very 

 short. 



Calanus flavipes. 



Frons triangulatus, vix prominulus. Cephalotliorax 5-articulatus, pos- 

 tic£ attenuatus, obtusus aut subacutus. Antennm anticas corpore paulo 

 longiores, duplo leviter curvatce, apicibus f route vix posterioribus ; setas 

 Us affinis similes. Styli caudales oblongi, setis mediocribus, non diffiisis. 

 Abdomen 2-articulatum ; — an adultum? 



Front triangular, slightly prominent. Cephalothorax five-jointed, 

 broadest anteriorly, narrowing much behind, and obtuse or subacute. 

 Anterior antennse a little longer than the body, very slightly doubly 

 curved, tips hardly posterior to line of beak ; setae like those of the 

 affinis. Caudal stylets somewhat oblong, setae of medium length, not 

 spreading. Abdomen two-jointed, the second oblong (possibly not 

 adult) . 



Plate 73, fig. 9 a, animal, enlarged ; b, extremity of antenna. 

 Taken, off the harbour of Rio Janeiro, January 7, 1838. 



Length, one-tenth of an inch. Colourless, except the lateral organs 

 and antennae, which were part orange. 



