NO. 3541 BENTHIC AMPHIPODA — BARNARD 23 



Family Lysianassidae 



Acidostoma hancocki Hurley 



Acidostoma hancocki Hurley, 1963, pp. 37-40, figs. 9, 10. 



Material: 6429 (2). 



Distribution: Monterey Bay to southern California, 33° N, 22- 

 73 m. 



Anonyx adoxus Hurley 



Figure 4 

 Anonyx adoxus Hurley, 1963, pp. 108-112, figs. 35, 36. 



Diagnosis: Eyes dark, rather small for genus, forming an elongated 

 oval of even dimensions, not expanded at either end; epistome and 

 upper lip not differentially produced; coxa 1 rounded ventrally; 

 gnathopod 1 with article 6 concave posteriorly, narrowing distally, 

 palm short, coarsely serrate, dactyl strongly overlapping palm; palm 

 of gnathopod 2 short, slightly produced, dactyl short, fitting palm 

 perfectly; pereopods 1 and 2 with hooked, unstriated spine at base 

 of article 7; all pereopods with large spines on sixth articles; inner 

 ramus of uropod 2 not abnormally shortened, bearing small con- 

 striction on dorsal margin; rami of uropod 3 subequal in length, 

 article 2 of outer ramus very small (see figure) ; first pleonal epimeron 

 differing on the two sides of the adult specimen, on the left side with 

 the anterior edge straight, on the right side produced anteriorly 

 (see figures); second pleonal epimeron with rounded anteroventral 

 corner, posterior corner with small, blunt tooth; third pleonal epimeron 

 rounded at anteroventral corner, posterior corner with moderately 

 slender, medium-sized tooth; body lacking sculpture or minute 

 ornamentation. 



Material: 6432, female, 10.0 mm, and 17 hatched juveniles. 



Remarks: This adult specimen has the special characteristics noted 

 by Hurley in his key (1963, p. 103), but it differs slightly in the con- 

 figuration of its epistome-labrum complex, the accessory flagellum is 

 shorter, and marginal spines are absent from the telsonic lobes. The 

 weakly hooked, blunt distal spines of the sixth articles on pereopods 

 1-2 are small, as shown by Hurley. However, the minute ornamen- 

 tation of the spines has the appearance of the large spines of the A. 

 liljeborgi group of the genus. 



Anonyx adoxus most closely resembles Anonyx nugax (Phipps) and 

 its varieties as arranged by Gurjanova (1962), but the eyes of A. 

 adoxus are not differentially widened. The following species, refer- 

 ences to which may be found in Gurjanova (1962), differ from the 

 specimen at hand in the morphology of the parts and appendages 

 fisted: A. liljeborgi, upper lip and uropod 2, third pleonal epimeron; 

 A. affinis, A. minimus, uropods 2 and 3; A. validus, third pleonal 



