425 



posterior edge subangular above the middle, and very finely serrated. Eyes 

 large and convex, rounded triangular in form, witli the anterior edge somewhat 

 insinuated, visual elements very conspicuous, pigment dark brown. Superior 

 antennae nearly attaining half the length of the body, 1st joint of the peduncle 

 rather large, equalling in length the other 2 combined, and produced at the 

 end posteriorly to a spiniform projection, last joint very short and, like the 

 preceding one, edged inside with small calceolse, flagellum considerably longer 

 than the peduncle, and composed of numerous (about 65) short articulations, 

 each having anteriorly a distinct calceola. Inferior antennee somewhat longer 

 than the superior, the last 2 joints of the peduncle nearly of equal length, 

 and provided posteriori 3^ with slender setae, flagellum longer than the peduncle, 

 and composed of about 85 articulations carrying, like the 2 outer joints of 

 the peduncle, calceolse. anteriorly. Gnathopoda powerfully developed, and 

 nearly of equal size, propodos in both pairs more than twice as long as the 3 

 preceding joints combined, and oblong oval in form, palm slightly arched, 

 and defined posteriorly by a distinct obtuse projection armed with several 

 spines, dactylus elongated and evenly curved. Pereiopoda moderately slender, 

 basal joint of penultimate and antepenultimate pairs rather small, and having 

 the posterior edge produced above the middle to an acute triangular projection ; 

 last pair somewhat exceeding half the length of the body, and having the 

 basal joint rather broad in its proximal part, with the posterior edge angular 

 above the middle and produced below to an acuminate corner. Last pair of 

 uropoda with the inner ramus somewhat longer than the outer, both narrowly 

 lanceolate in form, and densely edged with spinules. Telson conically tapering 

 distal^y, and likewise densely edged with small spinules, cleft occupying about 

 I /B of the length of the telson, terminal lobes acuminate. Colour, as noted 

 in a 3 r oung specimen collected at Hasvig, Finmark, rather gorgeous, the 

 body being variegated all over with brown, orange, and pure white, 

 gnathopoda tinged with a beautiful carmine. Length of adult female 

 reaching 30 mm. 



Remarks. - This magnificent form was described as early as in the 

 3^ear 1778 by Lepechin as OH I'M/* aculcatus, and subsequently recorded by 

 Owen under another name, viz., Ainpli-itlior Ediwnlxii. Goes restored the older 

 specific name of Lepechin, and referred the species to the genus Awpltilhonofu* 

 of Costa. It is a very distinct species, and easily recognizable both by its 

 large size and by its spiny armature and greatly produced rostrum. The 

 form described by the author at an earlier date, from a solitary specimen, as 

 Tritropis avirostris, I now find is nothing else than a young one of the present 

 species, in which, by some accident, the rostrum had become deformed in a 

 peculiar manner 



