J 2 I 



towards the end. The uropods reach nearly the end of telson and their rami are about equal 

 in length. 



The copulatory organs (fig. 5<5) show some minor differences from those of 5. affitie. 

 The terminal process is a little more than three times as long as broad, with its basal third 

 somewhat broader than the next third but without any real angle between these two parts; 

 the terminal part is somewhat widened, spoon-shaped, seen from behind broadly rounded, seen 

 from in front the terminal and a short part of the lateral margin are curved forwards and 

 furnished with about 6 saw-teeth ; as the whole distal part is diaphanous these teeth are visible 

 through the skin when seen from behind as in fig. 5 b. The proximal process is a little shorter 

 and distinctly narrower than the terminal, and shaped as in S. affine. The lateral process at 

 the base a little removed from the proximal process and besides much shorter and less than 

 half as broad ; it is somewhat sinuate, not expanded distally and there cut off very obliquely 

 on the outer side. 



Length of the male 6.5 — 9.5 mm., of the female almost 13 mm. 



Remarks. — The antennular peduncles and flagella are a little longer and more 

 slender than in the two preceding species, and the same is the case with the sixth abdominal 

 segment, but the best character is the shape of the eyes. In the specimens from the u Siboga" 

 they are proportionately light and less or more reddish or yellowish, with the lower third 

 somewhat darker and the median third quite light, lighter than the upper part. In numerous 

 specimens from the Monaco collection they are much darker, but that may be due to the 

 excellent state of preservation. — A specimen from Stat. 203 has an Epicarid attached to the 

 upper side of the ocular segment beneath the frontal plate. 



Dis t r ibu ti o n. — The "Challenger" specimen was taken South of the Cape of Good 

 Hope ; Sars mentions that he had some specimens from the Mediterranean, and in the Atlantic 

 it has been taken as far northwards as South of Iceland : lat. 63°o8 / N., long. 2i°3o'W. 

 Besides I have specimens from the Pacific. 



c. Species with the e 1 o n g a t e d pair o f 1 e g s terminating in real c h e 1 ae with 

 a w e 1 1 d e v e 1 o p e d immovable f i n g e r from t h e penultimate joint. 



24. Stylockeiron maximum H. J. H. PI. XVI, figs. 6a — 6d. 



1908. Stylockeiron maximum H. J. Hansen, The Danish Ingolf-Expedition, Vol. III, 2. Crust. 

 Malac. I, p. 92. 



Stat. 128. July 22. Lat. 4 27 N., long. I25°25'.7 E. 1645 m. HENSEN vertical net, from 700 m. 



to surface. 1 adult female. 

 Stat. 141. August 5. Lat. i°o'.4S., long. I27°25'.3E. 1950 m. HENSEN vertical net, from 



1500 m. to surface. 1 very young specimen. 

 (Stat. 243. December 2. Lat. 4 3o'.2 S., long. I29°25'E. HENSEN vertical net, from 1000 m. 



to surface. 1 very young specimen, probably this species.) 



Description. — This large species is closely allied to 5". abbreviatum G. O. Sars ; 

 in the paper quoted I pointed out the two most conspicuous differences between both forms, 

 and the passage in question may be reproduced here. 



SIBOGA-EXrEDITIE XXXVII. l6 



