78 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 27 



Oediceropsis (Paroediceroides) Schellenberg, 1931 



Paroediceroides, as stated by J. L. Barnard (1961b), is closely re- 

 lated to Oediceroides Stebbing, differing mainly in the posteriorly pro- 

 duced coxa 4; in this regard it is also related to some species of Mono- 

 culodes Stimpson, that genus intergrading with Oediceroides in the con- 

 figurations of the gnathopods. In addition, Paroediceroides trepadora 

 Barnard (1961b) has affinities with Oediceropsis Liljeborg (see Sars 

 1895: pi. 114). Barnard (1961b) erred in his key to the Oedicerotidae, 

 as Oediceropsis does possess a posteriorly produced coxa 4. Barnard 

 mentioned that the mouthparts of P. trepadora were like those of 

 Oediceropis. That genus has been described as having lateral eyes ; 

 Schellenberg (1931) described Paroediceroides as having eyes fully 

 fused. Pareoediceroides trepadora lacks eyes, and might be assigned to 

 either genus. Paroediceroides should be reduced to subgeneric status 

 under Oediceropsis ; by disregarding eyes, the subgeneric differences 

 may be denoted as the presence of a swollen first article of antenna 2 in 

 Oediceropsis and a small unswollen first article in Paroediceroides. 



Oediceropsis (Paroediceroides) elsula, new species 



(Fig. 31) 

 Diagnosis: Rostrum veiy short, reaching about a third of the way 

 along article 1 of antenna 1 ; lateral cephalic lobes exceeding rostrum 

 in forward extent, rounded ; eyes absent ; posterior lobe of article 5 of 

 gnathopod 1 short and blunt ; telson truncated ; coxa 1 with rounded 

 anteroventral corner ; process of coxa 4 blunt. Uropod 3 missing. 



Holotype: AHF No. 6015, female, 3.6 mm. Unique. 



Type locality: Station 6837, Tanner Canyon, California, 32°-34'- 

 36"N, 1 19°-02'-48" W, 644 m, January 29, 1960. 



Relationship : This species differs from Oediceropsis trepadora (J. L. 

 Barnard 1961b) and O. jtiorosa. n. sp., in the very short rostrum. It dif- 

 fers from Oediceropsis brevicornis Liljeborg (see Sars 1895: pi. 114) 

 in the lack of eyes, the unswollen first article of antenna 2 (a sub- 

 generic difference) and the longer first antenna. 



Oediceropsis proxima Chevreux (1908) also lacks eyes. The new 

 species may not be distinct from O. proxima although coxa 4 is bluntly 

 and not acutely produced and the posterior lobe of article 5 on gnathopod 

 2 is shorter and blunter. 



Oediceropsis sinuata Schellenberg (1931) has fused eyes and an 

 emarginate telson, among other characters of distinction. 



