NO. 3 BARNARD: THE PHOXOCEPHALIDAE 221 



Third epimeron: posterior edge slightly convex (appearing concave 

 from unflattened view), lower corner scarcely produced and bearing 

 one seta. 



Male. — Sexual dimorphism typical. The -rostrum of the head is 

 usually less constricted. / 



Holotype.—USNM Cat. No. 97307, female, 3.3 mm. 



Type locality. — Station 126-33, Santa Maria Bay, Lower California, 

 24-45-00 N, 112-13-30 W, 5-25 fms, gray sand, March 21, 1933, col- 

 lected by the Velero III. 



Remarks. — This species is recognized easily by the very broad body, 

 the narrowed rostrum and the 2 large spurs on peraeopod 5. 



An interesting specimen, apparently a mutant, is, a male (3 mm) from 

 Sta. 2607-54 which bears a long epistome similar to that seen in P. epis- 

 tomus but which is otherwise like typical specimens. 



Material examined. — 3027 specimens at 153 stations. 



Distribution. — Southern California to Santa Maria Bay, Lower Cali- 

 fornia, 15 to 115 fms. The species is concentrated mainly in depths be- 

 tween 30 and 50 fms where it is associated with dense populations of 

 the brittle star, Amphiodia urtica. 



Paraphoxus stenodes, new species 



(Plates 17, 18) 



Diagnosis of female. — Head with rather short, very narrow rostrum 

 constricted in front of the eyes ; eyes medium in size. Body narrow. 



Epistome massive, rounded in front. 



Maxilliped palp article 4 with small apical spine and subapical seta. 



Gnathopod 1 : article 6 slightly shorter than 5, moderately expanded, 

 palm slightly oblique, less so in gnathopod 2. Ratio of lengths of articles 

 5-6 :, Gnathopod 1 = 20:18, Gnathopod 2 = 1:1. 



Peraeopod 3 : articles 4-5 broadly expanded but not as wide as article 



2, article 6 shorter than 5, article 7 moderately long. Ratio of widths of 

 articles 2,4,5,6 = 27:22:20:9. 



Peraeopod 4 : article 4 as broadly expanded as article 4 of peraeopod 



3. but rather narrow in relation to articled of peraeopod 4; article 6 

 longer than 5. Ratio of widths of articles 2, 4, 5, 6 = 35:21 :14:7. 



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

 is 41 :44, extending down to middle of article 4, lower edge truncate 

 but dipping anteriorly, sweep point near distal end of article 3, posterior 

 edge rather convex and armed with 4 moderately large sharp teeth, above 



