64 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 27 



that such were overlooked on other species of Bonnierella. However, 

 B. linearis and B. lapisi both differ from other species in the genus in 

 the small size of the male first gnathopods; this may be evidence of 

 generic distinction. 



Antennae and all pereopods are missing on the male holotype, but a 

 few pereopods have been drawn from those remaining on the female 

 specimen. 



The mouthparts all resemble those drawn for B. linearis linearis. 



Ischyrocerus pelagops J. L. Barnard 



Ischyrocerus pelagops J. L. Barnard 1962a: 56-58, fig. 25. 



Canyon material: 4852(36). An unidentified specimen of Ischyro- 

 cerus was recorded at 6815. 



Family LILJEBORGIIDAE 



Liljeborgia cota J. L. Barnard 



Liljeborgia cota J. L. Barnard 1962b: 83-86, figs. 8, 9. 



Slope material: 2192 {\),n?,5{-^). 



Canyon material: 6497(1), 6832(3), 6833(1), 7154(1), 7288(3), 

 7289(2), 7290(2). 



Basin material: 2335(1), 2729(1), 5933(1), 6338(1), 6339(1), 

 6347(1), 6348(1), 6351(1), 6828(1). 



Remarks: Specimens from station 6832 represent an additional kind 

 of aberrancy not noted by Barnard (1962b) : all teeth of pleonites 1-5 

 are as large as the largest shown in Barnard's figure 8G. 



Genus Listriella J. L. Barnard, 1959a 



In bathyal depths the five Californian species of this genus are dif- 

 ficult to distinguish. Like other amphipods descending into deeper waters 

 they lose pigment in varying degrees and the eyes become reduced or 

 lost. An aberrant form of Listriella eriopisa and forms of L. goleta 

 are morphologically similar to the normally blind L. albina, also known 

 from shallow water. In shallow water all of these taxa are clearly dis- 

 tinct because of pigmentary displays. 



Numerous and clearly identifiable L. albina are present in the sam- 

 ples at hand. The specimens are characterized by lack of eyes, short an- 

 tennae, greatly expanding sixth article of gnathopod 1, somewhat short- 

 ened outer ramus of uropod 3, and the presence of a palmar notch on 

 gnathopod 2. Most nearly related to these is a specimen from 7289, 

 bearing slight traces of eyes, equal rami of uropod 3 and short an- 

 tennae. This I name L. eriopisa, aberrant form ; it is simply a pigment- 



