244 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 18 



Peraeopod 3: articles 4-5 narrower than 2 but rather broadly ex- 

 panded, article 6 narrow, as long as article 5 ; article 7 moderately long. 

 Ratio of widths of articles 2, 4, 5, 6 = 9:7:6:2. 



Peraeopod 4 slender distally, article 5 only three fourths as long as 

 4 and slightly shorter than article 6. Ratio of widths of articles 2, 4, 5, 

 6= 16:7:5:2. 



Peraeopod 5 : article 2 rather broadly expanded, its ratio of width 

 to length is 41 :46, extending down slightly beyond end of article 3, 

 lower edge quite convex, its sweep point at level of base of article 3, 

 posterior edge with 7-8 small serrations at and above sweep point. 

 Remainder of appendage slender, article 6 slightly longer than either 

 4 or 5. 



Uropod 1 : peduncular margin with 2 short spines, each ramus 

 with one marginal and one terminal spine; rami shorter than peduncle. 



Uropod 2: peduncular margin with 4 short spines, rami shorter 

 than peduncle, each with a terminal spine, no marginal spines. 



Uropod 3 : inner ramus half as long as outer, article 2 of outer 

 ramus little more than one third as long as article 1, slender. 



Telson rather broad, apices slightly oblique, broad, each armed with 

 a spine and setule. 



Third epimeron : posterior edge slightly convex, armed with 3-4 setae 

 near lower corner, the latter being subquadrate. Length 4.5 mm. 



Male. — Specimens of a size similar to the female appear to be 

 more differentiated, the spines on the uropods being more numerous, 

 especially on the peduncle of the second uropod. The eyes are scarcely 

 larger than those of the female. Other sexual differences are normal. 



Southern Representatives of Paraphoxus spinosus 



Surface collections of males resembling this species were collected 

 near Coronados Islands. The specimens approximated 3 mm in length 

 and differed from Puget Sound material mainly in the longer fifth 



PLATE 29 



Paraphoxus spinosus Holmes, female, 4.5 mm, False Bay, San Juan Island, 

 Washington. 



Figs. A, A", head; B,C, antennae 1, 2; D, upper lip; E,F, mandibles; G, 

 lower lip; H,I, maxillae 1, 2; J, maxilliped; K,L,M, gnathopods 1, 2, 

 1; N, coxa 3; 0,P,Q,R, peraeopods 2, 3, 4, 5 ; S,T,U, uropods 1, 2, 3 ; 

 V, telson; W, pleon segment 3. 

 Male, young, 5 mm. Fig. X, uropod 3. 

 Male, 4.5 mm. Figs. V,Y', head; Z,Z',3, uropods 1, 2, 3 ; 2, antenna 2. 



