﻿COPEPODA 



8l 



Remarks. In spite of the .small differences enuinerated in the description, I do not donbt that 

 this species is identical with that described by .Sars from Norway, and with that which Wolfenden has 

 described nnder the name of l\scudartidiHs from the Fteroe channel. According to my investigations 

 the size of the specimens varied from 36 to 44 mm., the biggest being those from northern regions; 

 Farran's (1905) specimens measured 3'3— 35 mm., and even 2-65; these small specimens possibly belong 

 to another specie.s. 



17. Chiridius nasutus n. sp. 

 (PI. II fig. 4a; te.xt-figs i8a— e). 



1905. pars? Cliiridius ariiiatiis Boeck. Farraii. 



Description. f$. Size: Specimen from vSt. 167 288 nnn.; anterior division 219 mm.; urosonie 0-69. 



The shape of the body is in the main like that of the preceding species, but somewhat more 

 slender (text-fig. 18 a). The insertion of the autennnlae is apparently better removed from the tip 

 and the rostral spines, which are somewhat longer '' ' 



and basally swollen, and directed more forwards 

 (text-figs 18 b—c). The anterior division is just three 

 times as long as the abdomen. The genital somite 

 (text-fig. 18 d), which has a receptaculum seminis like 

 that of CIi. aniiaf/is. is about i'5 as long as the third 

 and 17 as long as the fourth somite; the furcal rami 

 are 17 as long as wide and 17 as long as the anal 

 somite; the last segment is alnnit half as long as 

 the third one. The aiitciniular. which extend some- 

 what beyond the end of ccphalothorax, but scarcely to 

 the end of the abdominal somite, have the segments 

 24 and 25 well defined ; the measurements differ only 

 in minor details, as the segment 20 is a little longer Text-fig. iS. Ch. mnuitis 11. .sp. 



than 8~9, as the segment 18 is a little longer than ='• "^'^"^ '" dorsal view x 16. b. Rostru,,, from bdow x .50. 



' c. Head in lateral view X (>"■ f'- Ceiiital somite etc. X o". 



21, and as the segment 23 is SCarceU' I'l as long as e. Pe.s IV dext. in anterior view with ahnornial rami X 'S"- 



24. The appendages are like those of CJiiridins 



aniiahis, but the Sp. of the segment 23 extends somewhat beyond the end of the segment 25. The 

 (iiifniiKu- arc like those of the preceding species, 1)ut the exo])odite is 1-5 as long as the endopodite. 

 The iiiitiidihnlac and iiiaxillar are scarcely different, and the niaxilliilar only by the smooth anterior 

 surface of the third ba.sipodite. In the iiiaxilliprds the third basipoditc is 1-5 as long as the .second, 

 and 2-2 as long as the endopodite. The legs are only in minor points different from tho.sc of Ch. 

 ariiiatus: the Se of Re I in the first pair of legs extends a little beyond the end of the .second .seg- 

 ment, the articulation between the Re I and II of the second pair of legs is well developed anteriorly 

 as well as jiosteriorly, and its Irruiiiial spiiir has 30—40 spinules (fig. 4 a). .'V cm-ions difference is 

 found between this species and Cliiridius ii/od,s/ns as well as aniia/iis iu the arrangement of the 

 i^ltnidiiliir porrs\ in the number of the [lores it is, as shown iu fig. 4 a, like Ch. i/iodrs/iis, as a single pore 



Tlic InKolfl-XpL-Jition. 111. 4. ,1 



