NO. 3541 BENTHIC AMPHIPODA — BARNARD 29 



occur which resemble the figures of P.fatigans pubhshed by Barnard. 

 The first gnathopods of P. jatigans are slender, those of P. daboius 

 strongly expanded and those of the specimens at hand are intermediate 

 between the two species. The two species and the specimens at hand 

 have small female eyes. The epistomal cusp is usually longer than 

 it is in either P. Jatigans or P. daboius. 



The two configurations of pereopod 5 are: Article 2 has more than 

 3 very small teeth crowded together on the posterior margin, the 

 oblique ventral edge being slightly convex rather than truncate as in 

 P.fatigans from southern California (figs. Qd,k,l); article 2 has only 

 2 or 3 slightly enlarged, less crowded teeth, the oblique ventral margin 

 being nearly truncate (fig. 6c). A third kind of rare occurrence, is 

 shown in figures 6a,e,i,j; the posterior teeth of article 2 are very large 

 and resemble those of P. variatus Barnard (1960b). 



Although the gnathopods of the specimens at hand are stouter 

 than those of P. variatus, the enlarged teeth of pereopod 5 on some 

 individuals demonstrate the close relationship of the P. fatigans 

 complex with P. variatus. Barnard (1960b) has aheady considered 

 the possibility that P. fatigans is a phenotype of P. variatus, but a 

 clarification of the problem is complicated by the additional dif- 

 ferences displayed by the specimens from Monterey Bay. 



The Monterey fatigans complex resembles Paraphoxus epistomus, 

 of which only a few specimens have been found in the present samples. 

 Paraphoxus epistomus may be distinguished by the horizontal ventral 

 edge (either truncate or slightly convex) of article 2 on pereopod 5 

 and by the slightly stouter gnathopods. A few specimens assigned 

 to P. fatigans show a relationship to P. epistomus because of the 

 peduncular setosity of uropod 2. Most of these specimens have the 

 elongated epistomal process. 



Distribution: Monterey Bay to Todos Santos Bay, Baja California, 

 12-162 m. 



Paraphoxus obtusidens (Alderman) 



Paraphoxus obtusidens.— Barnard, 1960b, pp. 249-259, pis. 33-37; 1964a, p. 244. 



Material: 6429 (1), 6430 (1), 6431 (6), 6432 (3), 6433 (5), 6435 

 (1), 6438 (1), 6439 (1), 6444 (1), 6453 (1), 6469 (3), 6471 (5). 



Distribution: Kurile Islands to Columbia, South America, 0-180 m. 



Paraphoxus robustus Holmes 



Paraphoxus robustus.— Barnard, 1960b, pp. 235-236, pi. 25; 1964a, p. 244. 



Material: 6431 (1), 6432 (2), 6433 (4), 6466 (1), 6471 (1), 6474 (4). 



Distribution: Puget Sound, Washington to San Quintin Bay, Baja 

 California, 4-183 m. 



