NO. 3 BARNARD: THE PHOXOCEPHALIDAE 249 



the other forms. Thus, the Newport facies does not carry the warm 

 southern trend to its extreme and may be evidence that it is a population 

 with a somewhat different genetic constitution. 



The complex of forms in P. spinosus is similar to the complex in 

 P. obtusidens and at times it is difficult to separate the two complexes, 

 particularly young P. obtusidens. The larger eyes, shorter head and 

 shorter inner ramus of uropod 3 serve to distinguish P. spinosus. 



Perplexing specimens are found occasionally such as a 6.5 mm 

 animal from M-10-48 (middle California) which in size resembles P. 

 obtusidens but which has the short head of P. spinosus; it has been 

 placed with P. obtusidens as a mutant. 



Material examined. — 341 specimens at 36 stations. 



Distribution. — Widely distributed in the western Atlantic Ocean. 

 Eastern Pacific Ocean from Puget Sound to the Gulf of California. 

 Southern California coastal shelf, 5 to 40 fms, all but 2 samples shallower 

 than 20 fms; not usually abundant in comparison with its close relative, 

 P. obtusidens; in Newport Bay, California (Barnard 1959) it is widely 

 scattered and abundant; occasionally caught in plankton tows, for in- 

 stance at Coronados Islands. 



Paraphoxus obtusidens (Alderman) 

 (Plates 33, 34, 35, 36, 37) 



Pontharpinia obtusidens Alderman 1936: 54-56, figs. 1-13, 19; 

 Hewatt 1946: 199; J. L. Barnard 1954: 4. 



Pararpinia (sic) pontarpioides Gurjanova 1953: 229-230, figs. 11-12. 



Paraphoxus obtusidens, J. L. Barnard 1958: 147. 



Diagnosis of female. — Head rather large, broad basally, the long 

 rostrum tapering evenly anteriorly; eyes medium in size, round. Body 

 narrow. 



Epistome variable, unproduced or with a small conical anterior cusp. 



Maxillipedal palp article 4 simple apically. 



Gnathopod 1 : article 6 longer than 5, not very broadly expanded, 

 palm moderately oblique. Ratio of lengths of articles 5-6; Gnathopod 

 1= 17:21, Gnathopod 2 = 14:20. 



Peraeopod 3 : articles 4-5 about three fourths as wide as article 2, 

 article 6 narrow, as long as or longer than article 5, article 7 moderately 

 long. Ratio of widths of articles 2, 4, 5, 6 — 28:20:20:9. Ratio of 

 length of article 5 to 6 ranges from 22 :30 to 22 :23. 



Peraeopod 4 slender distally, article 5 about two thirds as long as 

 4, article 6 ranging from three fourths to as long as articles 4 and 5 



