PSElDKIPHArSIA LATIFROXS. 257 



on its proximal or inner side; that this tei-minal part is so extremely different 

 in outline when seen from the inner side and from behind is due to its very 

 curious shape and the irregular curvature of the plate itself. The distal part of 

 the median lobe is produced in a rather long, tapering, termiiiall_\- rounded lobe 

 projecting very much l^eyond tlie distal part of the lateral process; this j)rocess 

 (p''.) is somewhat small, beyond the middle strongly cur\-ed inwai'ds antl without 

 any tooth at the bend; the adcHtional jii'ocess (p\) is shaped as a rather small 

 but strong spine inserted a little beyond the cur\-ature of tlie !at(>ral process. 

 The auxiliary lobe is long and slender. The setiferous lobe is broad, with setae 

 along the distal part of the inner margin, along both margins of the triangularly 

 produced terminal part and along almost the proximal two thirds of the outer 

 margin, leaving the distal shorter part naked. 



Length of males IS. 5-19. 5 nun., of one of the largest females 22 mm. 



Remarks. — According to my examination of Sars's type in the British 

 Museum his figures and descri])tion are incorrect in several particulars. It may 

 be pointed out that the type has the lobe of first antennular jnint witii two teeth, 

 the process on the thii-d abdominal segment cannot be described as " mucronate ", 

 because its lower margin is straight but the upper margin convex, and the eye is 

 too small in the figure. These specimens were certainly not full grown. The 

 species is easily distinguished by having distinctly produced, acute angles or 

 real, small denticles on the upper posterior margin of tourth and fiftli alxlominal 

 segment.s, furthermore by its extremely large eyes, the l)ifid and vwy ol)lique 

 lobe from first antennular joint l)ut with no ear-like process or lamella on second 

 joint, etc. 



Distribution. — The ten Stations above named are all situated in a rather 

 small area along the coast of Peru; the Station most remote from that coast is 

 at a distance from it of about 120 geographical miles. Sars's specimens were 

 taken off the coast of Chile. This species is unknown from any other area in the 

 Pacific, as the specimens referred to it by Ortmann belong to tlie two preceding 

 species. And it was never found in tlie Indian Ocean or the Atlantic. 



PSEUDEUPHAUSIA H. .J. Hansen (1910). 

 Only a single species is known. 



26. Pseudeuphausia latifrons (1. O. Sars. 



18S3. Eiiphmisin Inlifrons G. O. Sars, Forh. Vid. Selsk. Christianiii for 1883, no. 7, p. li). 

 18S.5. Euplmiisifi lalifrons G. O. Sars, Challenger Kept., 13, p. '.).'>, pi. 16, figs. 17-23. 

 1910. Pseudeuphausia lalifrons H. J. Hansen, Siboga-Exp., 37, p. 103, pi. 1.5, figs. la-Id. 



