PSEUDEUPHAUSIA LATIFRONS. 207 
on its proximal or inner side; that this terminal 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, terminally rounded lobe 
projecting very much beyond the distal part of the lateral process; this process 
(p*.) is somewhat small, beyond the middle strongly curved inwards and without 
any tooth at the bend; the additional process (p°.) is shaped as a rather small 
but strong spine inserted a little beyond the curvature of the lateral 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 18.5-19.5 mm., of one of the largest females 22 mm. 
Remarks.— According to my examination of Sars’s type in the British 
Museum his figures and description are incorrect in several particulars. It may 
be pointed out that the type has the lobe of first antennular joint with two teeth, 
the process on the third 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 fourth and fifth abdominal 
segments, furthermore by its extremely large eyes, the bifid and very oblique 
lobe from first antennular joint but with no ear-like process or lamella on second 
joint, ete. 
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 the two preceding 
species. And it was never found in the Indian Ocean or the Atlantic. 
PSEUDEUPHAUSIA H. J. Hansen (1910). 
Only a single species is known. 
26. Pseudeuphausia latifrons G. O. Sars. 
1883. Huphausia latifrons G. O. Sars, Forh. Vid. Selsk. Christiania for 1883, no. 7, p. 19. 
1885. Huphausia latifrons G. O. Sars, Challenger Rept., 13, p. 95, pl. 16, figs. 17-23. 
1910. Pseudewphausia latifrons H. J. HANSEN, Siboga-Exp., 37, p. 103, pl. 15, figs. la-1d. 
