260 THE SCHIZOPODA. 



Sta. 4730. Jan. 20, 1905. Lat. 15° 7' S., long. 117° 1.2' W. 300 fms. to surface. 14 specimens. 



Sta. 4732. Jan. 21, 1905. Lat. 16° 32.5' S., long. 119° 59' W. 300 fms. to surface. 9 specimens. 



Sta. 4734. Jan. 22, 1905. Lat. 17° 36' S., long. 122° 35.6' W. 300 fms. to surface. 2 specimens. 



Sta. 4742. Feb. 15, 1905. Lat. 0° 3.4' N., long. 117° 15.8' W. 300 fms. to surface. 2 specimens. 



Finally from the following locality: — 



Fiji Islands. 5 m. South of Suva lightship. Dec. 16, 1897. 100 fms. 1 small specimen. A. Agassiz. 



To the description and remarks in the "Siboga" paper a few points may be 

 added. 



The maxillae (fig. la) have the main part, viz. second and third joints with 

 their lobes, very large in proportion to the fom'th joint; the palp, which is much 

 smaller than in the two following species, scarcely half as long again as broad 

 and only a little more than half as long as the inner margin of the lobe of tliird 

 joint. 



In most adult females the rostrum is long (fig. 4c) and only moderately 

 broad towards the base, but in two or three females the rostrum is very short 

 and broadly rounded (fig. 4d); whether this aberrant feature is an individual 

 anomaly or is due to damage days or weeks before the capture of the individuals 

 cannot be decided. The adult males from the East Pacific differ from those 

 from other oceans by having the very slender rostrum (fig. 4a) appreciably 

 longer, about as long as or a little longer than the breadth of the second antennu- 

 lar joint. Finally' immature males before the last moult may be mentioned. 

 As is seen from a comparison of fig. 4a, representing an adult male, with fig. 4b 

 representing an immature male — and both figures were drawn with the same 

 degree of enlargement — the two distal joints of the antennular peduncles are 

 proportionately more slender and especially the third joint conspicuously longer 

 in the immature than in the adult, furthermore the former has the rostrum 

 somewhat longer and broader at the base than is the case in the adult. — Finally 

 the copulatory organs, as the difference in the relati\'e length of the processes 

 in the adult and in the immature male is interesting and at first sight even be- 

 wildering. 



In the adult N. microps the proximal process is, as shown in the "Siboga" 

 paper, considerably or much longer than the terminal process, while in the 

 immatures males the difference between the length of the two processes men- 

 tioned is slight (Plate 10, fig. lb), thus in this respect only it is but slightly dif- 

 ferent from the feature found in N. atlantica H. J. H. (In the latter species, 

 however, the terminal process overreaches considerably the spine-shaped process, 

 \\hich is not the case in the immature N. microps). And it is very interesting 



