151 



The adult ova-bcariug fetnales from the HolUiiidsch Diep are 

 70 — 75 mm. long, specimens of a somewhat smaller size are, 

 however, already also provided with eggs and the Collection 

 contains even two egg-bearing females that are only 44 or 45 mm. 

 long. Like is the case with L. adspersus (Rathke), the male 

 seems to be of a smaUcy size than the female, the largest male 

 specimens of tlie Itollandsch Diep being 65 mm., rarely 70 mm. 

 long. TJic ivhole hodij of L. lonyiroslris is sprinlded with sniall 

 chromatophores^ innumerable small reddish dots of iinequal size ; 

 they are well developed and quite conspicuous on the ujiper and 

 on the lower half of tlie rostrum, on the antennular and an- 

 tennal peduncles, near the distal extremity of the scaphocerites, 

 on the abdominal segments and on the caudal fan, but tliey exist 

 also on the carapace, on the legs and on the pleopods. 



In the adult male the rostrum usually reaches 1 — 2 mm., in 

 the adult female (Fig. 3 — 3c) 1 — 3 mm. heyond the distal extre- 

 mity of the antcnnal scalcs; in the male it often, however, 

 projects only 0,5 mm. beyond the scaphocerites, but rarely in 

 this species the rostrum appears just as long as the scales ; 

 among 160 adult or alraost adult specimens, for the greater 

 part ova-bearing females, the rostrum proved to be about 20-times 

 just as long as the scales, while in 140 specimens it distinctly 

 projected beyond them. In 2 adult male specimens from the 

 HoUandsch Diep the rostrum was just as long or almost just as 

 long as the antennular peduncle, but this is a very rare excep- 

 tion. In young individuals, 40 mm. long or less, the rostrum 

 also often appears just as long as the scales or it reaches only 

 0,5 mm. beyond them, and one young male and 2 or 3 still 

 younger specimens were observed, in which the rostrum reached 

 to midway between the distal extremity of the antennular peduncle 

 and that of the scaphocerites. The rostrum is usually slightly 

 directed upward, obliquely, in a straight or almost straight line 

 from the base to the apex, but often a more or less long proxi- 

 mal part of the rostrum reaches horizontally forward, while the 

 distal part appears more or less distinctly trending upwards. Only 



