iN A NEW SPECIES OF SCLEftOCHKILUS. 



305 



bent chastse is given to show that it is practically identical with tho-c of the Scotia 



P>ay specimen (<;/! text-fig. 1, 11, p. _".>">, and text-tig. 4). 



The first neuropodium bears capillarv ch;et,-i- of l he t \\ o t vpcs shown in text- 

 fig. I. ('. D. The third notopodium and neuropodium were not excised lor examina- 

 tion, but the former contains an anterior row of eighl stronger, bent 

 chaetre, like those in the first two notopodia. 



The fourth and following pa ra pod ia. w hidi do not bear -Wronger, 

 bent ehaetae, contain in each ram us capillarv ch;et;e and about half a 

 do/en furcate cheetse identical in form and in the dimensions of their 

 prongs with those described on p. 'Jilii. but their shafts are shorter 

 (about '4 mm. long). 



I have recentlv had the opportunity of examining the tvpe- 

 specinieii of /''n ii/i'iiiu m'/i/'t/a Ehlers. : which was sent to me from 

 the Koiiigliches /oologisches Museum. Berlin, through the kindness 

 of ProfesMir A XT. COLLIN, and I find that Dr ( JKAVIKR'S specimen does 

 not agree with the tvpe. for in the latter most of i he chsetiferous 

 segments are three-ringed, stronger chaetse are not present in the 

 anterior notopodia, and there are no neuropodial cirri. /:'. i-n/nt<t 

 lias been placed by Professor EHLERS i as a synonym of Oncoscolex 

 <!i<-rn<-/i;i'f/i!< Sehmarda, after he had examined the type-specimen 

 of the latter. 



Direct comparison of Dr (JitAViEii's " Knnn'mu oculata" with the 

 specimen collected in Scotia Bay, allowance being made for thedis- 

 paritv in si/.c and age. shows that they belong to the same species. 

 The di.-i't.-r of the two specimens exhibit an agreement in structure 

 which is particularly striking, and prove that the specimens are 

 specifically identical. There are only two slight difference- between 

 the specimens: (1) tin- eyes of the Scotia Bay example are in 



contact, while those of Dr ( i l: A VIKl;'s specimen are separate, but a 



similar variation in the grade of development of the eyes is met 

 with ill ditl'ereiit individuals of SclerOcheiluS nl'muliix (see p. _".)) ; 

 (_') the lir-i neuropodial cirrus is borne on the I Dili duet ifcrotis TF.XT-FIG. 4. Bent 



I Cl j. 1 T 1 \ \ ch:i la flOlll tin 1 



segment in the Scotia Bay specimen, and on the L'lsl in Dr second notopodium 



GRAVIER'S, but a greater variation is met with in N. minutus, ^ ''"*" 



where the tir>t iteiirocirrus may be borne by the L'.'ith. 'J7tli. L".th, (xyfta^fig.** ]^ 



or :Jlst chu'tiferou- segment (-ec p. '!(!). A minute comparison P- 295.) 



of the two specimen- shows that I hey arc both examples of the same SpecieSj 



N. antarcticus, n. sp. 



* /mil. .I'lLfii., Sii]i[>l. v (11)1)1), ji. ^i;.",. A I'lillrr 'li-.-i-i-i]itinti ni' llic .-] .i-i'i iii.-ii (ft <] li'i-t i'i I at Tun 1 1 '(_-, ( '1 1 i lr) \va - 



III.KKS iii l-'e.<t*i-lu: A". . 1 '.>< '1, ]pp. is], ls-2. 



t Al'lniiiill. h'. ' Math.-Phyi. A'/., X.R, IM. iii, No. 1 (['.mi), p. r,\ X,,ii,,,,,,i Antarcti, I 



Nat. //..-'., vol. vi (1912), p. L'<; ; //. . 1:1111-1903, Kd. xiii, /,<><]., v(1913), pp. 537, 538. 



I KoY. SOC. KMN. TKAXS., VOL. L, -417.) 



