NO. 5 BARNARD: AMPHIPODA 65 



less specimen. An individual from 4823 has well developed eyes but 

 otherwise is like that of 7289. The next most nearly related is from 

 7845 and represents a normally pigmented L. goleta with shortened 

 antennae. Next is a specimen from 6806 having eyes, no pigment, elon- 

 gated antennae but long equal rami of uropod 3, which I assign to L. 

 goleta; then follows a specimen from 5006 having pigment and char- 

 acters of L. goleta but short equal rami of uropod 3. (Reexamination 

 of shallow water L. goleta shows that individuals like that of 5006 are 

 not uncommon.) 



Finally, a remarkable specimen from 7288, apparently assignable to 

 L. albina, bears immense third uropods with thickened inner rami but 

 otherwise has the aspect of L. eriopisa. 



Listriella albina J. L. Barnard, giant form 



(Fig. 12) 

 Listriella albina J. L. Barnard 1959a: 25-26, figs. 11, 12. 



Material: Specimens all blind, pigmentless, having article 6 of 

 gnathopod 1 characteristically expanding as grossly as shown in the 

 original description. 



Remarks: One giant male specimen (5.4 mm) from 7288 might be 

 considered a blind specimen of L. eriopisa because of the greatly elon- 

 gated inner ramus of the third uropod, but other features characteristic 

 of L. albina remain: gnathopod 2, with its palmar notch, the strongly 

 convex third pleonal epimeron, the equally long pereopods 4 and 5 and the 

 elongated antennae. However, article 6 of gnathopod 1 is less trapezoidal 

 than it is in shallow-water specimens. 



Canyon material: 2148(1), 2190(3), 2191(9), 2317(1), 3000 

 (1), 5046(1), 6501(1), 6849(3), 6854(1), 6912(1), 6916(1), 7029 

 (2), 7285(1), 7288(1). 



Slope material .• 2362 ( 1 ) . 



Listriella eriopisa J. L. Barnard 



Listriella eriopisa J. L. Barnard 1959a: 22-24, figs. 8-10. 



Canyon material: 2191(1), 2192(4), 3180(1), 4846(1), 5367(1), 

 6845(1), 6854(1), 7029(1), 7030(2), 7038(2), 7284(2), 7285(1), 

 7289(1), 7730(1). 



Slope material: 5616(2). 



Remarks: Three forms of this species are now apparent: (1), the 

 normally pigmented form with unequal rami of uropod 3; (2), the 

 normally pigmented form with equal rami of uropod 3; and (3), an 

 unpigmented form with equal rami of uropod 3 ; eyes of the latter often 

 are obsolescent. 



