﻿COPEPODA 



193 



Description, f ?. .Size of speriiiiciis from Inj^olf St. 105 was 2-23 mm; anterior division i-66 mm.; 

 nrosome 0-57 mm. Sars' specimen measured scarceh- 2 mm.; Farran's 2-3 — 2-5 mm. 



The shape of the body is scarcely different from .Sars' figures; the appendages, as far as they 

 were examined in the single mutilated specimen, were scarceh- different; posteriorl\-, near the end of the 

 second outer segment of the first pair of legs, a trans\erse row of short spines was found. They///// 

 pair of legs has on the left side the Se standing opposite the Si, as in Sar.s' figure, but on the right 

 side it stands somewhat more distalh'. 



fc?. Size of specimen from ,St. 82 Thor was 2'5 mm.; anterior division 1-65 mm.; urosome 0-85 nun. 

 A male from St. 183 measured 33 mm. 



The shape of the body is rather slender, very much like that of .S". iii(ii{)iiis. The distinction 

 between the head and first tergite is indicated dorsall\', and the fifth thoracic tergite, which is rounded, 

 is well marked out. The rostniiii consists of a basal bifurcate part, whicli 

 is prolonged into a thin rather stiff filament on each side; the oxitline 

 is, above the rostrum, at least in the single, somewhat mutilated specimen, 

 somewhat concave. The abdomen (fig. 7 a) is distincth' half as long as the 

 anterior division, and the comparative length of the somites is 7, 43, 27, 

 30, 4, and 10 for the furca, which is about 1-3 as long as wide. 



The antcinmlar. which were broken, have the proximal segments 

 like those of S. jiiagiius. The iiiitniiiac are scarceh' different from those of 

 the female. The niandiicatory part of the iinuidihular is rather slender; the 

 tliird basipodite is very short and robust; it possesses, somewhat beyond 

 the middle, a single short hair and, more terminally, at least one quite rudi- 

 mentary one. The /i/nxilhi/or are well developed and in most respects like 

 those of the female. The long well developed Li I has 10 .short setae at 

 least, the Li II has one, tiie Li III has 3 at least, and the third ba.sipodite 

 has 5; the Ri I has 2, and the Ri III ^11 have 5 setae; the exopodite 

 has 7 well de\-eloped setae. The iiiaxilhti' and iiinxillipi'ds are in most 

 respects like those of the preceding species. 



The natatory legs were scarcely different from those of the female; 

 on the posterior surface of the third outer .segment in the first pair of legs no spines were observed. 

 The fifth pair of legs (fig. 7b and text-fig. 59b) is in the main like those of the preceding species, 

 but differs, however, in a few respects. The inner terminal process of the first outer segment of tlie 

 right foot is somewhat pointed, not rounded; the right endopodite has the two first .segments some- 

 what convex with a small inner terminal process, which was not observed in the l)igger specimen; the 

 terminal segment is better articulated. The left right leg is scarcely different from tliat of the preceding 

 species except in minor details, as seen when comparing figures (text-fig. 59b); tlie left Re III lias 3 

 fairly long setae. 



Occurrence. The Ingolf I';xi)editiou has gathered a single mutilated female with closing net 

 700 fathoms ",7 '896 St. 105 C)5''34 L. N. 7°3i L. W. 



The S/S Thor has gathered a single male: 



Tlic Ingiilf-|-;vpedilion. Ill, |. ^5 



Text-fig. 59. Scaphocnlatius irr- 



vicornis d. O. Sars. f o". 



a. Pes \' (text X c. 150. b. Pes 



V in situ from the left; teriui- 



ual segments X c- 250. 



