CYCLOPOIDEA. ;Q47 



longitude 23° 45' west; also, October 24, latitude 4 i° north, longitude 

 19*° west. 



Length, one-thirtieth of an inch. Colour, greenish along the medial 

 line (intestinal), reddish either side, and sides and head mostly bluish. 

 The length of the cephalothorax is about four times the breadth. 

 The pigment of the inferior eyes, as seen in a vertical view, forms an 

 oblong spot extending forward to the front. The abdomen is very 

 short; the caudal stylets about as long as the second joint. The 

 longer apical setae of the anterior antennas is as long as two or three 

 terminal joints. Natatories four pair, the two medial largest; the 

 longer branch two-jointed; the shorter having but one joint, and not 

 half the length of the longer. 



b. Cephalothorax postice productus et acutus. 



* Seta antennarum anticarum apicalis subapicalibus brevior. 



PONTELLINA AGILIS. 



Feminae : P. crispatae quoad antennas similis. Anguli postici cephalotho- 

 racis acuti. Frons rotundatus. Setas antennarum anticarum fere rectal, 

 prope basin confertce. — [Forsan P. crispatae cephalothorax interdum 

 postice acutus et species non differt.J 



Female: — Like the crispata in the antennae and most characters. 

 Cephalothorax rounded in front, acute behind, posterior segments 

 three, besides the fourth which is very short. Setae of anterior 

 antennae nearly straight, crowded towards the base of the antenna. 



Plate 80, fig. 10 a, animal, enlarged; b, side view of head; c, poste- 

 rior antennae ; d, one of the third pair of natatories ; e, one of the 

 posterior thoracic feet. 



Very abundant, November 17, 1838, 4 A. m., latitude 19i° south, 

 longitude 38° 45' west. 



Length, one-eighth of an inch. Colour blue, especially anteriorly, 



