PSEUDEUPHAUSIA LATIFJIONS. 257 



on its proximal or inner side; that this terminal part is so extremely dilt'erent 

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

 curious shape and the irregular fur\ature of the plate itself. The distal part of 

 the median lobe is produced in a rather long, tapering, terminally rounded lobe 

 projecting very nuich 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, 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 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. Euphausia latifrons G. O. Sars, Forh. Vid. Sel.sk. Christiania for 1883, no. 7, p. 19. 

 1885. Euphausia latifrons G. O. Sars, Challenger Ropt., 13, p. 95, pi. 16, figs. 17-23. 

 1910. Pseudeuphausia latifrons H. J. Hansen, Siboga-Exp., 37, p. 103, pi. 15, figs. la-Id. 



