1911] Esterly: Copepoda of thi San Diego Region. 333 



in that joint of the first, second and fourth pairs. The first 

 pair is shown in pi. 31, fig. 87. and the outer ramus of the fifth 

 pair in pi. 32, fig. 112. 



Length: 5.31mm. 



Coloration: There is a characteristic brown fleck around the mouth; 

 otherwise the body is exceedingly transparent. 



Occurrence: Station 1249, tow at, and vertical from, 325 f., Bounding 

 370 t, July 11, 1906. 



The shape of the body in this species is characteristic so far 

 as it is possible to compare it with figures of other species. The 

 presence of eight bristles on the terminal joint of the inner ramus 

 seems not to have been mentioned for other species. 



Augaptilus lucidus n. sp. 



PI. 26, fig. 7; pi. 27, fig. 16; pi. 30, figs. 75, 77; pi. 32, fig. 105. 



Adult male. The body is robust but the head is not so 

 rounded as in the preceding species, and the rostral prongs are 

 of a different shape, though heavy and stiff and expanded at the 

 base (ef. pi. 27, figs. 16 and 18). The cephalothorax is 5-seg- 

 mented and three and three-fourths times the length of the abdo- 

 men and furca; its greatest width is at a point midway between 

 the anterior and posterior borders (pi. 26, fig. 7). The cephalo- 

 thorax is densely covered with fine spines. The abdomen is 5- 

 segmented; the genital segment is a little longer than the anal, 

 the three middle segments are of equal lengths, and their com- 

 bined length is that of the first segment. The furcal blades are 

 as long as the fourth and fifth segments of the abdomen together 

 (pi. 26, fig. 7). 



The anterior antennae reach a little beyond the posterior 

 border of the first thoracic segment (pi. 26, fig. 7). The rami 

 of the posterior antennae are of equal lengths (pi. 30, fig. 77) ; 

 the basal joint of the inner ramus is over half as broad as it is 

 long. The blade of the mandible is shown in pi. 30, fig. 75 ; it is 

 of the same structure as in A. macrodus, but the proportions are 

 different. Both rami of all the feet are 3-jointed, but the end 

 joint of the inner ramus of the third pair has eight bristles, 

 while that joint in the other pairs (except the fifth) has six 

 bristles. The fifth feet are not unusual (pi. 32, fig. 105). 



