1138 CRUSTACEA. 



the right male antenna are coalescent into a single slender joint. 

 These antennae diverge from the head at an angle of nearly 60°, and 

 afterwards bend outward to 90°. The shorter branch of the posterior 

 antennas is not over half the length of the longer. The setae of these 

 and the following organs are long. Caudal stylets nearly half the length 

 of the abdomen, in the Pacific and Atlantic species divaricate; and 

 the same, or perhaps a little longer proportionally, in the specimen 

 from the Lagulhas Bank. The caudal setae are about as long as the 

 abdomen. In the specimens from the former regions, the first, third, 

 and fourth setae are equal, the second one-third longer, the fifth 

 shorter than the fourth. 



PONTELLINA CURTA. 



Frons rotundatiis. GepJialotliorax curtus, crassiusculus, b-articulatus, 

 capite discrete, angulis posticis brevissimd acutis. Antennce anticw 

 corpore breviores, rectce, 105° divaricates, setis brevities, apicali anticd 

 longiore. Antennce posticce ramis valde incequi, minore plus dimidio 

 breviore. Styli caudales oblongi, non divaricati. Setis mediocribus. 



Front rounded. Cephalothorax short and rather stout, rounded in 

 front, very short acute behind, five-jointed, the head separate and 

 unarmed, posterior segments three. Anterior antennae straight, di- 

 vergent 105°, much shorter than the body ; setae short, anterior 

 apical longest, the subapical either half shorter or less. Caudal 

 stylets a little oblong, not divaricate ; setae about as long as abdomen, 

 somewhat spreading. 



Plate 80, fig. 1 a, animal, enlarged ; b, extremity of antenna. 



Collected, January 24, 1842, off the south end of Mindoro, East 

 Indies; March 4, 1842, at the eastern entrance of the Straits of Sunda; 

 also, on the Lagulhas Bank, April 8, 1842. 



Length, one-twentieth of an inch. Head blue, but body yellowish, 

 with a green medial portion, proceeding from the alimentary cavity. 

 This is another short and stout species, yet not as thick as the last. 



