Vol. 3] Esterly. — Copepod Fauna. 75 



and third of equal lengths; fureal blades four times as long as 

 broad (PI. 12, fig. 53). The left anterior antenna is as long as 

 the cephalothorax exclusive of the last segment. Fifth feet: the 

 right (PI. 14, fig. 91) slender and comparatively simple in struc- 

 ture, terminal joint long and curved, the preceding one with a 

 stout process on the inner margin; left foot (PI. 14, fig. 89) with 

 two teeth on the terminal joint. 



Female : Head as in male, rostrum synniietrical ; last thoracic 

 segment, abdomen, and furca asymmetrical, the thorax ending on 

 each side in pointed wing-like projections (PI. 12, figs. 50, 51). 

 Anterior antennae reaching to the last thoracic segment. Fifth 

 feet simple, inner ramus rudimentary, outer with three apical 

 teeth and one in the middle of the outer border. 



Length : Male, 2.4 mm. Female, 2.6 mm. 



Coloration : Slight greenish hue when alive : colorless in for- 

 malin. 



Occurrence : One male in the cove of La Jolla, January 2, 

 1906, 7 p.m. One female was taken on the surface three and one- 

 half miles from La Jolla, June 26, 1905. Types in the collection 

 of the LTniversity of California. 



The structure in the fifth feet in this species places it near 

 L. nerii Kroyer, but the lateral hooks on the head make it distinct 

 from the latter. In the possession of these hooks it approaches 

 L. u'ollastoni Lubbock and L. kroyeri Brady, but differs from the 

 former species in the structure of the fifth feet, and from the 

 latter in the last thoracic segment. The peculiar asymmetry of 

 the rostrum in the male, if not an individual deformity, is also a 

 distinct character. 



Genus Pontellopsis Brady. 



Pontellopsis (part), Brady ('83), pp. 85, 87. 

 Monops, Giesbrecht ('92), p. 72, 486. 

 Monops, Wheeler ('99), p. 182. 

 Pontellopsis, Giesbrecht ('98), p. 145. 



Head without lateral hooks, asymmetrical in male, and with- 

 out dorsal or ventral eye-lenses. The ventral eye ranges in shape 

 from flatly convex to spherical ; rostral filaments long and deli- 

 cate. Fourth and fifth thoracic segments fused, lateral angles 



