NO. 3 BARNARD: THE PHOXOCEPHALIDAE 325 



Heterophoxus oculatus, forma nitellus, new form 



(Plate 61, figs. A-F) 



Diagnosis. — Differentiated from the typical form by the much longer 

 and more acute teeth on the second article of peraeopod 5. 



Other features. — Only two specimens of this peculiar form have 

 been collected. In the larger specimen figured, the palp of the mandible 

 is quite slender and smaller than normal and the spines on the first 

 two uropods much sparser, while the spines on the posterior edge of 

 peraeopod 5, article 2, are stouter. The eyes were not visible. 



The smaller specimen has a normal mandibular palp, only two 

 slender spines are present on the posterior edge of article 2 of peraeopod 

 4 and the teeth on peraeopod 5, article 2, are few in number. 



Remarks on distribution. — The larger specimen came from Costa 

 Rica at 10 fms (Sta. 253) while the smaller came from the channel be- 

 tween Catalina Island and the mainland, California, at 700 fms (Sta. 

 2849). The wide geographic separation, broad bathymetric distribution, 

 and rarity of this form suggest that it is a mutant. 



Genus Harpiniopsis Stephensen 



Harpiniopsis Stephensen 1925: 171. 



Diagnosis. — Maxillipedal palp article 4 with long apical seta or 

 setae; eyes absent; article 2 of peraeopod 3 narrow; male second antennae 

 as long as body; both pairs of male antennae lack the enlarged setal 

 brushes of male Harpinia. 



Type species. — Harpiniopsis similis Stephensen. 



Remarks. — A discussion of the reasons for the retention of this 

 genus may be found under "Harpinia" in this paper and in Barnard 

 (1958). All of the new species which are described from the eastern 

 Pacific Ocean herein have been placed in Harpiniopsis despite the lack 

 of males in some species. For the present, there is no evidence that true 

 Harpinias occur south of Pt. Conception, California, where these species 

 were collected. The key to the genus Harpinia should be checked for 

 complete verification of specific identities, but the following key is use- 

 ful for those species assigned to Harpiniopsis. 



