182 University of California Publications in Zoology [Vol. 11 



LIST OF SPECIES 



PAGE 



Arietellus pacificus n. sp 189 



Augaptilus californicus n. sp 186 



Augaptilus depressus n. sp 187 



Augaptilus romanus n. sp 188 



Augaptilus simplex n. sp 188 



Euchaeta elongata n. sp 183 



Gaetanus aseendens n. sp 182 



Onchocalanus latus Esterly 183 



Scolecithrix aculeata n. sp 183 



Scoleeithrix elephas n. sp 185 



Scolecithrix longirostris n. sp 185 



Scolecithrix mollis n. sp 186 



Scolecithrix obscura n. sp 184 



Gaetanus aseendens n. sp. 



PI. 10, figs. 1, 3, 6; pi. 11, fig. 39; pi. 12, fig. 56 



Adult female. The cephalic spine is short and directed down- 

 ward, and the rostrum is rather prominent for this genus (pi. 10, 

 fig. 6). The spines on the last segment of the thorax are heavy 

 and pointed toward the dorsal surface of the animal (pi. 10, figs. 

 1, 3). The proportions of the abdominal segments may be seen 

 in plate 10, figures 1 and 3. The anterior antennae are a little 

 longer than the cephalothorax. The first joint of the posterior 

 maxilliped has the characteristic lamella of the shape and size 

 indicated in plate 11, figure 39. The first foot has specific 

 characters (so far as the forms of this region are concerned; pi. 

 12, fig. 56), and the first basal of the fourth foot has the row of 

 hair-like spines. 



Length: 3.7 mm. (cephalothorax, 3 mm.). 



Coloration : Unpigmented and rather opaque in formalin. 



Occurrence: Haul 1524. 



Euchaeta elongata n. sp. 



PI. 10, figs. 5, 16, 27; pi. 11, fig. 37; pi. 12, fig. 49 

 Adult female. The head and rostrum in profile (pi. 10, fig. 

 16) have a characteristic shape ; the rostrum is heavy and straight, 

 pointing obliquely down; the frontal hairs are not situated on 

 a noticeable papilla. The sides of the last thoracic segment are 

 not broadly rounded, but end in blunt projection (pi. 10, figs. 



