11111 1 Esterly : Copepoda of tht San Diego Region. 323 



outer ramus are of about equal lengths, but the spine of the 

 second joint does not reach the base of the first spine of the 

 third joint. 



Length: 6.6mm. 



Coloration: The intestinal contents are red, the first three thoracic seg- 

 ments are outlined in red and the last segment is entirely so. The furcal 

 bristles are bluish red and highly iridescent; those of the posterior anten- 

 nae are somewhat iridescent, and there are two plumos ange bristles at 



the base of the anterior antenna. 



Occurrence: Station 1303, tow at, ami vertical from, 315 f., sounding 

 340 f., July 18, 1906; station 1306, tow at. and vertical from, L50 f ., July 

 is. 1906; station 1516-2, vertical from 250 f.. June 30, 1908. 



Genus Euchaeta Phillipi. 

 Euchaeta diegensis a. sp. 



PI. 28, fig. .".7: pi. 29, figs. 49, 55 ; pi. 31, fig. 92. 



Adult female. The rostrum is very Long and curved and the 

 frontal eminence is prominent, though it does not protrude very 

 much (pi. 28, fig. 37). The abdomen and genital segment re- 

 sembles h\ in, tin i Giesbrecht, hut the genital covexity and the 

 protuberances about the orifice an' different ; the right side of the 

 segment as seen in outline is more irregular, with a smaller knob- 

 like protrusion near the posterior margin of the segment (pi. 29, 

 tigs. 49, 55). 



The anterior antennae are about as long as the cephalothorax. 

 The maxilla has eight bristles (one very minute) on the first lobe 

 of the caiter margin, one on the second lobe of the inner margin, 

 two on the second basal and four on the fused second and third 

 joints of tile inner ramus. 



In the outer ramus of the second foot, the middle spine of 

 the outer margin reaches two-thirds of the distance from its base 

 to the base of the third outer marginal spine (pi. 31. fig. 92) ; in 

 E. mi ilia the spine is longer. The third outer marginal is half 

 as long as the middle one (in E. media it is about one-third as 

 long). The outer marginal of the second joint is twice as long 

 as the first of the third joint. 



Length: 4.22 mm. 



Coloration: Translucent and without pigment. 



Occurrence: Station 1140, vertical from 60 f., June 27, 1906. 



