173 



It is witli niucli doubt that these two specimens are referred 

 to Risso's L. Treillianus, for they only differ from the feniales that 

 were captured at Rovigno and referred p. 16(), 171 to L. ser rat us 

 (Penn.), by nniniportant characters presented by the shorter ranms 

 of the outer cmtennnlar fagellum and bij the mandibular palp. 



The ova-bearing female is 86 mm. long. The rostrum the 

 unarmed part of which is distinctly trending iipward, thoiigh the 

 apex is hardly situated higher than the upper border of the 

 carapacc, projects rather little (3,5 mm.) bevond the antenna! 



scales and is ' dentatc. ïlie 3'^ tooth is situated over the 

 5 



orbital margin and, as in L. serratns, the distance between the 



Ist and the 2'! is one and a half as long as that between the 



2<i and the 3<i; the foremost tooth is placed immediately before 



the penultimate joint of the antennular peduncle, just midway 



between the apical tooth and the orbital margin of the carapace ; 



the 3d tooth of the lower margin is placed immediately before 



the foremost tootli of the upper. 



The antennuhir peduncdc, measurcd from the orbital margin of 

 the carapace, is 12,5 mm. long and reaches to the distal (juarter 

 of tlie scaphocerite ; the shorter ramus is JuKt aa lomj as the 

 peduncle and fused to the longer for one-quarter of its length. 

 The shorter ramus extends by about one-third lts length, viz. 4/j mm., 

 heyond apex of rostrum. 



The mandibular palp differs from that of the specimens which 

 were referred to the typical L. serratus, by the stouter form of 

 the 2<1 joint, which is 1,7-times as long as thick ; the l^t or 

 basal joint is 0,8 mm. long, the 2^ 0,52 mm. long and 0,31 mm. 

 thick; the 3^ 1,26 mm. long, 0,25 mm. thick at base, 5-times 

 as long as thick. 



External maxillipeds rcaching by two-thirds the distal article 

 beyond the antennal peduncle. 



The legs of the l^t and of the ött pair reach the end of the 

 antennal scales. The legs of the 2<1 pair project by the fingors 

 and tivo-thirds of the palm beyond the antennal scales : merus 



