Vou.2] Ksterly—Copepoda of the San Diego Region. AS: 
® Pigment knob on right or left side; proximal joint of first 
antenna with several smaller and two larger (one straight and 
one curved) teeth on anterior border. Fifth pair of feet 4- 
jointed, with three apical bristles (fig. 330). 
eee 
Fig. 33.—Pleuromamma abdominalis and P. gracilis. (a) P.a., female, 
lateral, X31. (0b) P.a., fifth foot X45. (c) P.g., fifth foot 
195. 
¢ Pigment knob, genital opening and hooks on inner border 
of first joint of inner ramus of second foot, on left side. Proxi- 
mal joint of anterior antennae with small teeth only, grasping 
antenna on right side. Abdomen symmetrical. End joint of 
left fifth foot broadened. 
~ Coloration: Transparent, except for a small amount of red 
in the mouth region. 
Length: Female, about 2.4-3 mm.; male, 3.3 mm. 
Occurrence: A common species, both summer and winter, but 
males are very infrequently found; one male was taken June 2, 
1904. 
2. Pleuromamma gracilis Claus. 
Pleuwromma gracile Claus, 1863, p. 197, pl. 5, figs. 7-11. 
Pleuromma abdominale (in part) Brady, 1883, p. 47, pl. 2, figs. 
UENMGe joll, Bil, aero, Way Wee 
Pleuromma gracile Giesbrecht, 1892, pp. 347, 357, pl. 5, fig. 7; 
pl. 32, figs. 6, 18-20; pl. 33, fig. 41-47. 
Pleuromamma gracilis Giesbrecht, 1898, p. 110. 
2 Pigment knob on right side; anterior border of anterior 
antennae with only small teeth; fifth pair of feet 2-jointed, three 
prongs at the end (fig. 33c). 
